BARBOUR: SOME WEST AFRICAN AMPHIBIANS. 131 



about decided to consider this second specimen as the type of a new 

 species. Lack of sufficient material, however, makes this doubtful. 

 The specimen in the Schwab collection differs in having very large 

 eyes, larger than shown in Boulenger's figure. (P. Z. S. Lond., 1900, 

 pi. 29, fg. b.) The interorbital space is narrow, less than the width 

 of an eyelid. The back is covered with very fine granules in regular 

 lines instead of being " smooth and shiny." The profile is less slanting 

 than in G. batesii, so that the muzzle is thick and heavy. 



Astylosternus diadematus Werner. 



Nieden has noted the identity of Astylosternus Werner with Tricho- 

 batrachus Boulenger. The seven hairy frogs before me force the 

 conclusion that T. robustus Boulenger is a synonym of Werner's A. 

 diadematus. The amount of emargination of the tongue, the size 

 and position of the vomerine teeth groups, and the extent of the web 

 between the toes shows such variation as to agree with the descriptions 

 of both these species. Three of the seven specimens were procured 

 some time ago by exchange for the Museum of Comparative Zoology ; 

 the other four came with the Schwab collection. The University 

 of Michigan received thirteen examples, all from Efulen, Kribi, 

 Cameroons. 



Dilobates platycephalus Boulenger. 



A single example in the Schwab collection adds this species to the 

 fauna of Cameroons. Its occurrence is not, of course, unexpected, 

 as most of the species originally described from Gaboon have long ere 

 this appeared in collections from Cameroons. 



Nyctibates laevis, sp. nov. 

 Plate 2, Fig. 1. 



Type, M. C. Z. 2629, a single example from Efulen, Kribi, Cam- 

 eroons, taken by the Rev. George Schwab. 



Similar in general habit to N. corrugatus Boulenger (Ann. Mag. 

 N. H., ser. 7, 1904, 13, p. 261-2). It differs in smaller tympanum, 

 longer hind limb, large digital dilations, smooth skin on back, and 

 absence of the fine folds on the back converging posteriorly. 



