278 DR. W. A. CUNNINGTON OX 



bases of the fourth pair of legs are also visible much as in the 

 male. 



The proportions of the abdomen are likewise indicated as 

 affording a distinction between the species, yet it appears that, 

 as a rule, the female abdomen is really longer than broad, the 

 measurements agreeing closely with those of the male, though 

 of course the shape is distinctly different in the two cases. 

 While these additional observations slightly modify the account 

 o-iven by Thiele, thei-e can be no reasonable hesitation in 

 identifying the species, which is readily distinguished by the 

 conspicuous pigment spots and the nature of the antennfe and 

 maxillipeds. 



Tanganyika. — The species is apparently quite common in this 

 lake, as the collection contains more than thirty specimens 

 obtained from various localities. It does not appear to be 

 confined to one host, and it was in some instances found in 

 association with the endemic species of Arguhts. 



Occioi^rence. —Qumhu, 13/10/04. From gill -arches and roof of 

 mouth of large specimen of Ckti'ias rohecchii. Four males and 

 four females. A female of A. striatus was associa.ted with these. 



Sumbu, 20/10/04. From branchial arches and roof of mouth 

 of two smallish specimens of Clarias robecchii. Six males and 

 six females. 



Yua, 29/10/04. From surface of head and mouth of very 

 large female specimen (length 1550 mm., weight 30-6 kilogr.) 

 of a Siluroid (? Clarias lazera) — native name Muomi. Five 

 males and five females, with which a single A, striatus was 

 associated. 



Kala, 18/11/04. From mouth-cavity and gill-bars of large 

 Lates microlepis (length 910 mm.). Two females, associated with 

 specimens of Dolops ranarum. 



Ndanvie, ^jlj^'o. From surface of head and body of large 

 Lates microlepis. One male. Specimens of A. riibroptmctatus 

 were associated with this. 



YiCTOEiA Nyanza. — From this lake, too, specimens of 

 A. africamts were obtained by the Expedition for the first time. 

 All of them, as it happens, were collected at Bukoba, on the 

 western shore, the place at which Stuhlmann first discovered 

 Dolops [Gyropeltis] rana7-um. Curious to relate they were also 

 associated in every case with specimens of the latter, living with 

 them on a common host. 



Occurrence. — Bukoba, 24/4/05. From surface of body, mouth 

 and gill-chambers of a large Siluroid {^. Bagrus degeni) — native 

 name Nfui. One female specimen, associated with a number of 

 Dolops ranarum. 



Bukoba, 24/4/05. From surface of body and inside mouth of 

 large Protopterus cethiopicus (length 1040 mm.). Four males, 

 five females, associated with Dolops ranarum. 



Bukoba, 24/4/05. From surface of body, mouth, and gill- 

 chamber of large Siluroid (? Clarias angnillaris) — native name 



