G. GENERAL NATURAL HISTORY AND ZOOLOGY. 325 



which have never been shown to be incorrect. 12 A, July 

 31,1873,265. 



CONDITION OF THE LIVER DURING LACTATION. 



Investigations Avith various animals, by L. de Sinety, show 

 that tliere is a peculiar fattiness of the liver which begins, 

 continues, and ends with lactation, and is independent of the 

 period of pregnancy ; and that the fat is deposited in portions 

 of the liver entirely different from those in which it occurs as 

 the result of infiltration, degeneracy, or artificial processes. In 

 the former case, the fat is found, for the most part, in the cells 

 adjoining the central vein, very seldom in the external ones; 

 while in the latter the process of deposition is from the ex- 

 terior toward the interior.. This localization of fat deposit 

 was most decided in the livers of the human subject, and in 

 dogs, and less so in the herbivora. 28 C\March^ 1873, 141. 



THE BLOOD CORPUSCLES OF THE BATRACHIAXS. 



Mr. George Gulliver has lately published a table of meas- 

 urements of the red blood corpuscles of Batrachians, from 

 Avhich we learn that the animal possessing those of largest 

 dimensions is the Atiiphiuma tridactyluin of the Southern 

 Atlantic States, in which the longest diameter of the cor- 

 puscle is -jj^, and the shortest -^s of an inch. The next to 

 this is the Proteus anguiwus^ in which the longest diameter 

 is i_, and its shortest -f^ of an inch. Measurements are 



4005 



given of the blood corpuscles of various other species of sal- 

 amandroids, as also of frogs and toads ; and Mr. Gulliver 

 generalizes upon his observations as follows : 



1. The largest red blood corpuscles belong to the Proteidce, 

 and the largest of all to Amphiuma of this family. 



2. The smallest corpuscles occur in frogs and toads ; and 

 the smallest of all in some species of Piffo, though the com- 

 mon toad has slightly larger corpuscles than the common 



frog. 



3. The corpuscles are much larger, without exception, in 

 the Urodela (tailed) than in the Anura (tailless batrachians). 



4. The difference between the corpuscles of Sireclon and 

 Ijepidosiren is scarcely appreciable (or naught), save that 

 the nucleus is smaller in the former. 



5. Amjyhiuma and Sieboldicty both caducibranchiate spe- 



