472 ZOOLOGY. 



1. Byihinia, sp. nov(?). 

 Antalo. A single specimen only. 



2. Melania tuberculata, Miill. 



Stream at Ailat, Samhar, very little above the sea- 

 level. 



3. Lymnea Natalensis, Krauss. 



Stream at Guna-Guna, on the highlands. Some 

 specimens are precisely similar to those from South 

 Africa ; others are rather more tumid. 



A larger variety was obtained in the stream forming 

 the head of the Haddas river, near Takonda. 



4. Physa contorta, Mich. 

 Lake Ashaugi. Specimens from the Nile in the 

 British Museum have a smaller mouth. Others from 

 Natal are very similar in form. 



5. Physa, sp. 

 Stream on Wadela plateau, at about 9,500 feet near 

 Yasendy^. The two specimens obtained are small, and 

 probably immature. They resemble in form P. fon- 

 tinalis, but are not smootli like that species, nor have 

 they any internal labiation. They may possibly be only 

 an elongated variety of P. contorta. 



6. Aticylus fluviatilis, Miill. 



Streams, Guna Guna, &c., Tigr^. 



7. A. sp. 

 Stream near Mai Wahiz, Tigr^. Four small specimens 

 found. They closely resemble some varieties of the 

 Indian A. verruca, Bens. 



