312 DESCRIPTION OF PLATES. 



PLATE V. 



A comparative View of the Flat Vesicles of the Blood in dif- 

 ferent Animals, exhibiting their Size and Shape (CLIV) 

 as they appear through a Lens ^ of an inch focus. 



FIG. 1, Their size in an ox, a cat, an ass, a mouse, and a 

 bat. 



FIG. 2, Their size in a man, in a rabbit, a dog, and a 

 porpoise (CLV). 



FIG. 3, Their size in birds; viz. a pigeon, a hen, a chaffinch, 

 and a duck. 



FIG. 4, Their size in a chick, from the egg, on the sixth day 

 of incubation (see Note cxvi, p. 233). 



FIG. 5, Their size in the common fish, as the salmon, carp, 

 eel. 



FIG. 6, Their size in a full grown viper and in a turtle. 



FIG. 7, Their size in a small viper taken from the belly of 

 its mother (see Note cxvi, p. 233). 



FIG. 8, Their size in a slow-worm (CLVI). 



(CLIV.) See the copious Tables of Measurements of the blood-cor- 

 puscles of vertebrate animals, Note cxvm*, pp. 237 et seq. ; and the 

 Notes there referred to on the size and shape of the corpuscles. 



(CLV.) The central spot in the blood-corpuscles of mammalia should 

 not be confounded with the nucleus of the blood-corpuscle of oviparous 

 vertebrata ; see Notes xcvi and on. 



(CLVI.) The Tables of Measurements, at p. 242, show that the red cor- 

 puscle of the slow- worm (anguis fragilis) is a narrower ellipse than either 

 the corpuscle of the snake, of the adder, or of the boa, as explained in 

 my Paper on the Blood-Corpuscles of Ophidian Reptiles. a Other well- 



a Proceedings of the Zoological Society, August 9, 1842. 



