OF THE BLOOD A.XD CIRCULATION. 



197 



naked eye (fig. 211, a b). They are, consequently, from eight 

 rger here than in man. After the Proteus, we 

 e the largest 



blood-corpuscles in ^ 



the land salamanders, & ^ 



where they measure ^ 



in the long diameter 

 from the 1-5 Oth to 

 the l-60th of a line. 

 In the water sala- 

 manders they are still 

 very large, from the 

 l-70th to the l-80th 

 of a line in length 

 (fig. 212). In the 

 frog and toad they 

 are from the 1 -80th to 

 the 1-1 00th of aline 

 in length (fig. 213). 

 In the lizards, ser- 

 pents, and tortoises, 

 they are throughout 

 smaller, though still 

 measuring from the 1-1 22d to the l-150th of a line in length. 



In the majority of 

 fishes, and particu- 

 larly in all the bony 

 fishes, the blood-cor- 

 puscles are of a 

 rounded oval (fig. 

 214), not much long- 

 er than broad, flat- 

 tened, and from the 

 l-150thtothel-200th Fig . 2 13. A, a, a, a, b, blood-globules of 

 of a line in the long the edible frog (Rana esculenta} ; c, lymph 

 diameter. In the granule. B, blood-globules after the action 

 skates and sharks, of acetic acid. 



again, they are notably larger, and very similar to those of the 

 frog ; they are as much as from the 1-5 Oth to the 1-1 00th of a 

 line in the long axis. It is remarkable that in the cyclop- 

 tomes they greatly resemble those of man, being rounded, 

 discoidal, vaulted, slightly bi-concave (fig. 215, a, b\ and mea- 



Fig. 212. Blood and lymph-globules of the 

 great water-newt (Triton cristatus). o, 6, 

 blood-globules ; a*, a blood-globule with eccen- 

 tric nucleus ; c, lymph-granules, d, e t blood- 

 globules in progress of development ; they are 

 surrounded with delicate involucra. Globules 

 of this description are found abundantly in the 

 blood of well-fed animals generally. 



