Miscellaneous. 377 



fish, the large species of Gadus, or other voracious and well-armed 

 inhabitants of the sea. Lastly, as a Bucephalus has also been met 

 with in the livers of Paludince, and Gasterostoma in the intestines of 

 the pike, the eel, and other fishes, and even of the duck, I cannot 

 help thinking that the freshwater species belonging to this group of 

 Trematodes are more numerous than has hitherto been thought. 

 The differences mentioned above between the marine Bucephalus of 

 the ocean and that of the Mediterranean may also perhaps acquire 

 greater value when a complete and comparative study of these 

 animals has been made. — Comptes liendus, August 17, 1874, vol. 

 lxxix. p. 485. 



Note on the Enemies of Difflugia. By J. Leidy. 



Prof. Leidy remarked that in the relationship of Difflugia and 

 Amoeba we should suppose that the former bad been evolved from 

 the latter, and that its stone house would protect it from enemies to 

 which the Amoeba would bo most exposed. The Difflugia has many 

 enemies. I have repeatedly observed an Amoeba with a swallowed 

 Arcella, but never with a Difflugia. "Worms destroy many of the 

 latter, and I have frequently observed them within the intestine of 

 Nais, Pristina, Chcetogaster, and JEolosoma. I was surprised to 

 find that Stentor polymorphous was also fond of Difflugia, and I have 

 frequently observed this animalcule containing them. On one oc- 

 casion I accidentally fixed a Stentor by pressing down the cover of 

 an animalcule-cage on a Difflugia which it had swallowed. The 

 Stentor contracted and suddenly elongated, and repeated these move- 

 ments until it had split three fourths the length of its body through, 

 and had torn itself loose from the fastened Difflugia. Nor did the 

 Stentor suffer from this laceration of its body ; for in the course of 

 several hours each half became separated as a distinct individual. — 

 Proc. Acad. Sri. Philad. 1874, p. 75. 



On the Colour of the Kittens of the Species of Cats (Felidae). 

 By Dr. J. E. Gray, F.K.S. &c. 



The British Museum received a very young specimen of a jaguar 

 from M. Verreaux in 1860, labelled Leopardus onca, Mexico. The 

 body and head are 8| inches long, the tail 4| inches long. It is of 

 a nearly uniform brown colour, without any indications of darker 

 spots. The head, neck, and front of throat are rather paler than 

 the rest of the body, the hinder part and the feet being rather 

 darker. The upper lip is whitish, with a spot on each side of the 

 front, just under the nostrils. It is somewhat like the young of the 

 hunting leopard (Gueparda guttata) in the British Museum, de- 

 scribed and figured P. Z. S. 1867, t. xxiv., but very different from it. 



The young leopard, or panther (Leopardus varius), which was 

 born in the Zoological Gardens, has, like its mother, numerous spots 

 or roses on all parts of the head, bodv, and limbs ; but the tail is 



