140 MR. A. D. BARTLETT ON THE BREEDING [April 9, 



marginal shields ; the areolae being plain brown, as in the younger 

 specimen. 



Emys crassicollis, Gray, Cat. Tort. Croc. Brit. Mus. p. 16, 1844. 



Hab, Camboja. 



Two specimens, adult and young. 



As in Geoemyda macrocephala, the sternum of the young specimen 

 is rather higher than the adult, and the centre is separated from the 

 side by a distinct marginal keel, which is not so visible in the more 

 adult specimen. 



CisTUDO AMBOiNENSis, Gray, Syn. Cat. Tort. Croc. Brit. Mus. 

 p. 30, 1844. 

 Hab. Camboja. 



One specimen, adult, of the high, oblong variety. 

 The sternum is white, with an irregular black spot on each shield. 



Crocodilus porosus, Schneid. 



Crocodilus porosus. Gray, Cat. B. M. p. 58. 



C. biscutatus, Cuvier, Oss. Foss. v. 65. t. 2. f. 8. 



Hab. Camboja. 



There is a young specimen of this species, rather more than 4 feet 

 long, in the collection. It has no appearance of the ridges on the 

 centre of the hinder part of the skull, on which Crocodilus siamensis, 

 Schl., and C. galeatus, Cuvier (Oss. Foss. v. t. 1 . f. 9), is founded ; 

 indeed it is very doubtful if these were not accidental malformations 

 in the skull figured. 



2. Remarks on the Breeding of the larger Felid^e in 

 Captivity. By A. D. Bartlett. 



(Plate XXII.) 



The Lion {Felis leo) appears to breed more freely than any other 

 species of Felis, and the number of young at a birth is greater, not 

 unfrequently four and sometimes five being produced in a litter. It 

 is remarkable that these animals breed more freely in travelling col- 

 lections (wild-beast shows) than in zoological gardens ; probably the 

 constant excitement and irritation produced by moving from place 

 to place, or change of air, may have considerable influence in the 

 matter. 



The Tiger (Felis tigris) has rarely bred in confinement ; but there 

 are several well-authenticated instances of the female Tiger breeding 

 with the Lion. The hybrids lived, and in due time arrived at ma- 

 turity. 



Animals of this mixed breed have been exhibited in a travelling 

 menagerie kept by Mr. Atkins ; the appearance of the animals at 

 once bespoke their mixed origin. 



I have more than once met with instances of the male Jaguar {F. 

 onca) breeding with a female Leopard (F. leopardus) : these hybrids 

 also were reared recently in Wombwell's well-known travelling col- 



