Quarterly Journal of Microscopical Science, Volume 19J. and A. Churchill, 1879 |
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Expressions et termes fréquents
abactinal acid alveoli ambulacral amongst animals aperture appears arenaceous bacilli become blastomeres blood body brain canal cavity chambers character Characters.-Test chromic acid close columnar condition connection considerable contain contractile Crinoids described diam diameter distinct dorsal dredgings ectoderm Elasmobranchii elongated embryo epiblast epithelial cells epithelium fathoms fibres fibrils figures filaments flagellum Foraminifera ganglion genus germinal streak Globigerina granular groove head-kidney hypoblast intracellular network latter layer length less longitudinal lumen medullary membrane mesoblast mesoderm millim mouth mucous cells mucous glands Müllerian duct notochord nuclei observed olfactory lobe olfactory nerve olfactory pit oral plates posterior present primitive streak protoplasm regard rudiment seen segmental duct shell side species specimens spores stage stained structure submaxillary gland substance surface thick thickened thin tion tissues trace transverse tube vacuole ventral vertebrates visceral clefts wall Wolffian duct
Fréquemment cités
Page 440 - Club desire to place on record their sense of the great loss which they have sustained by the sudden death of their ordinary member, Dr.
Page 418 - The neurenteric passage persists but a very short time after the complete closure of the medullary canal. It is in no way connected with the allantois, as conjectured by Kupffer and Benecke, but the allantois is formed, as I have satisfied myself by longitudinal sections of a later stage, in the manner already described by Dobrynin, Gasser, and Kolliker for the bird and mammal. The...
Page 426 - ... ganglia. These ganglia are closely approximated and united by 5 or 6 commissures. They give off large nerves to the oral papillae. (2) The ventral nerve cords are covered on their ventral side by a thick ganglionic layer,1 and at each pair of feet they dilate into a small but distinct ganglionic swelling.
Page 381 - Dr. Klein, therefore, believes that whilst the evidence adduced by himself in support of the cause of pneumo-enteritis in the pig being a bacillus is sufficient to warrant a positive statement in the affirmative, that adduced by Davaine, Pasteur, and others in favour of a like cause for septicaemia is not.
Page 425 - I have had an opportunity of making investigations on some well-preserved examples of Peripatus Capensis, a few of the results of which I propose to lay before the Society. I shall confine my observations to three organs. (1) The segmental organs, (2) the nervous system, (3) the so-called fat bodies of Mr Moseley. In all the segments of the body, with the exception of the first two or three postoral ones, there are present glandular bodies apparently equivalent to the segmental organs of Annelids....
Page 427 - Peripatus was supposed to differ from normal Arthropoda and Annelida, viz. the absence of ganglia on the ventral cords, does not really exist. In other particulars, as in the amount of nerve cells in the ventral cords and the completeness of the commissural connections between the two cords, &c., the organisation of the nervous system of Peripatus ranks distinctly high.
Page 6 - ... projecting into the body cavity on each side at the root of the mesentery. It extends from the anterior end of the Wolffian body to the point where the foremost opening of the head-kidney commences. We have found it at a period slightly earlier than that of the first development of the headkidney. It is represented in figs.
Page 186 - Crinoids, exactly . the same position that ike internal mouth of Antedon occupies at the peristome, while the position of the string-like ridges (in case they represent passages as I can hardly doubt), is analogous with that of the open food grooves of recent Crinoids. The annular groove on the casts is probably an impression of the annular vessel of which the calcareous parts have decomposed. This organ, in the fossil state, heretofore only observed in the case of Aclinocrinus Vemeuilianus, existed...
Page 110 - I had occasion to examine the blood of a considerable number of animals, and eventually (July 1877) detected organisms in the blood of a rat, which at first sight I took to be of the nature either of vibrions or spirilla. The blood, when transferred to the microscope, appeared to quiver with life, but for some considerable time nothing could be detected to account for this animated condition, as the blood-corpuscles were somewhat closely packed. On diluting the blood with a half per cent, solution...
Page 208 - I use crystallised haematoxylin dissolved in the following mixture:—Prepare a saturated solution of calcium chloride in 70 per cent, alcohol, with the addition of a little alum ; after having filtered, mix a volume of this with from six to eight volumes of 70 per cent, alcohol. At the time of using the liquid pour into it as many drops of a concentrated solution of haematoxylin in absolute alcohol as are sufficient to give the required colour to the preparation of greater or less intensity, according...