108 
Napu Musk Deer (Moschus Javanicus, Pallas). 
1-13400 ) Common Pale Globules of the Blood. 
1-12000 ALAR. 1-3200 Common size. 
1-16000 Small size. 1-4000 Small ditto. 
1- 9600 Large ditto. 1-2666 Large ditto. 
1-12325 Average ditto. 1-3200 Average ditto. 
I may add that Mr. Siddall, who has lately at my request mea- 
sured the blood-corpuscles of the Ibex and of the Goat, has obtained 
almost exactly the same results as those above specified. 
Mr. Gulliver also communicated a paper ‘‘ On the Blood-Corpus- 
cles of the British Ophidian Reptiles.”” To this communication are 
added some observations on the figure of the blood-corpuscles of other 
oviparous Vertebrata. 
“The observations were made on perfectly fresh blood, and the 
corpuscles measured as they floated in the serum. 
“Though the blood-discs of Birds and Reptiles preserve their 
shape very clearly when rapidly dried on a ship of glass, they generally 
appear in this state slightly but distinctly smaller than when sus- 
pended in the serum of recent blood; whereas, when the blood-discs 
of Mammalia are dried in precisely the same way they are commonly 
slightly larger than in the wet state, as I have noticed more particu- 
larly in the ‘ Philosophical Magazine’ for January and February 1840, 
pp. 25 and 105.” 
“‘In Mammalia the envelope of the corpuscle is more delicate, more 
susceptible of contraction and of modifications of form, and apparent- 
ly softer, than in Birds and Reptiles ; so that the corpuscles of Mam- 
mals are more liable to shrink a little soon after removal from the 
circulating channels, than the corpuscles of Birds and Reptiles ; and 
it may be that this softness of the blood-disc of Mammals allows it 
to spread out in some degree, even when dried ever so quickly. But 
it is more probable that the corpuscles preserve their usual size and 
form when dried almost instantaneously, and that the shrinking or 
modifications of shape which the corpuscles may undergo in liquid, 
coagulating, or slowly-dried blood, may be influenced as much by 
changes in the surrounding fibrine as by a contractility inherent in 
the corpuscles. The envelope of the blood-dise of Fishes is much 
more delicate and evanescent than the same part in Birds and Rep- 
tiles ; hence in the blood of Fishes, even soon after death, the nuclei 
will be observed in great abundance, while the envelopes have par- 
tially-or entirely disappeared ; and the form of the entire corpuscles 
is not so easily preserved by drying as in the other oviparous verte- 
brate animals. P 
«The following measurements of the blood-corpuscles of the Slow 
Worm, Snake, and Viper, are all expressed in vulgar fractions of an 
English inch. The common sizes are first set down, then a space 
is left; the small and large discs are next noted, and lastly the ave- 
