NOTES AND JlKMOn.VNIW. 27«^ 



the corpuscles are not constant structiu\>s, M. l\>ncIiot lias made son»i> 

 observations,* of which the t'oHowinu; are the cliict' conclusions : 



(1) The red and wliite corpusch>s are doriv»>d rn)ni the sann> ana- 

 tomical elements. ('2) The nuclei of the white corpusch>s unihir^^o 

 complete segmentation, hut (J?) this scgn\entiilion dot's not o(MMU' so 

 long as theyax'o freely suspended and moving in (lu> scmmum. (■{) Th(^ 

 rod corpuscles are " tinal chMuentary forms." (5) Tlie so calh^l roti- 

 culum in these corpnsi-les of the Triton is mendy tlie n-sult <d' the 

 partial division of the substance of the nnch^us. ((i) In dovoh>p- 

 meut these nuclei reach a cortiiin maximum size, and thou (b>('rt>aH(>. 

 (7) The red blood-corpus(dcs themselves (lisiip|)rar by dissolution iti 

 the serum. (8) There is no iissiparous muitiplienliion of r(>d blood- 

 corpuscles aft(U" that tlies(^ bodi«is become provided with hiemoglobin, 

 (9) As is well known, the red corpuscles may b(^ discoid or ovoi<l 

 in shajHi, rthI it is suggestt^d that there is some relation bi'tweeii tlieso 

 two forms and the nu)lecular state of tlio contiined luenioglobin. Tlio 

 nucleolus of the corpuscdes is dciliiuid as being that point, or thoso 

 points, which luivo a greater " (dcctivo alii n i t.y " for carmine. Tho 

 paper is illustrated by a plate of sixteen (igures. 



Division of Cartilage Cells. — An importiuit rcHeareh on this Hubject 

 is publislKid by W. ScbleiclKir,! whose results agree in the main with 

 those of Flenmiing.J but diller in many points not wholly iininiportiuit. 

 Schleicher denies the pr(!S(jn(;e of a true intranuclear n(^t\vorl(, bid/ 

 describes rods, fd)res, and granules (Stiibeheii, If^iidchon, tind Korner), 

 as existing witliin the nu(d(!us. 'j'h(i lirst step in tho division of 

 a cartilage cell consists in the disintegration of the niudear irKimbrano ; 

 next, the contentsof tin; nucleus the rodH,(V:e.,unrl(!rgoan extraonlinary 

 series of changes of form and position, the whole nueleiis at the mimo 

 time constantly changing its position. After a time, the rods, itc, 

 take on a more or less [larnllel arrangement, and then, be(;oiriinf^ 

 approximated at their extremities, form a more or b;sH fuHilorm figure, 

 corresponding to the spiiidle-nmdeiiH of other observeiH. The approxi- 

 mated ends of tho rods then fuse together, and division tiiht'S plaeo 

 along a piano taken through the centre, and pe,ip(;ndiciilar to the long 

 axis of the spindle. 'J'he nuclei of the two daughter-eel Is are tliiiM 

 produced; each of these beeomr;s resolved int(» rods and (ibrcH, thoHO 

 undergo changes of form, and, at length, those situated towiudu the 

 peripliery of the nucleus curve roiitifi and fuse with one another, 

 forming a new nuclear membrane. In the membranebms Ktato of tho 

 nucleus a connection was observed betw«;en its fibreft and thoKO 

 occurring in the protoplanm of tlie e,ell the intriieelliilur network 

 of other authors. Some observatioriH made tended to tli<; ojiinio/i that 

 the intracellular fibres arone, by a proecHS of de,|;i.ri]in;itio;i, from th<) 

 capsule of the cell. 



Influence of the different Colours of the Spectrum on Animali,— 



The article of M. E. Yung, of which we gave an abstract (ffun 



* Kobin'rt '.Joiirn. Au-'it. <:t, I'liyw.,' xv. (\HT.i) '.>. 

 + ' Archiv. f. Mikr. Anat..,' xvi. (\H1H) 2J.V 

 X Thi'.. Jonrn;.], ii. CIW^ K57. 

 VOL. II. T 



