62 Mr. G. T. Bethune-Baker on new 



dorsal margin slightly curved, but slope of the shell above 

 nearly straight. 



Valves inflated, irregularly undulated, and finely striated, 

 the undulations being more regular and pronounced on the 

 umbonal areas. Lunule flattish, not defined ; escutcheon 

 depressed and bordered by obscure ridges, which become 

 angular near the umbones. Ligament short, broad, and 

 conspicuous. 



Interior surface undulating, white ; pallial sinus wide, 

 ascending, angular, reaching a little beyond the middle of the 

 shell ; adductor scars superficial and not differing much in 

 size. Hinge-plate very short; teeth small and near together, 

 botli posteriors long and thin, that of the right valve being 

 very narrow and not bifid, though it is grooved. 



EXPLANATION OF PLATE I. 



Figs. 1, 2. dementia obliqua, .7. -Br., right valve. 

 Figs. 3, 4. Clementia vatheleti, right valve. 



VI. — Descriptions of new Species of African TJeterocera in the 

 Oxford Museum. By G. T. Bethune-Baker, F.L.S., 

 F.Z.S. 



Notodontidae. 



Stauropus danibce, sp. n. 



$ . Head and thorax chocolate-brown, with a large ad- 

 mixture of greenish rough scales. Primaries creamy grey, 

 thickly irrorated with green and dark red-brown scales; the 

 postmedian deeply crenulate line, more or less obscured, is 

 dark red-brown ; submarginal line dark red-brown, deeply 

 waved, prominent, and continued along the fold across the 

 middle of the cell and less distinctly along the costa ; this 

 somewhat unusual marking should serve to easily discrimi- 

 nate the species. Secondaries pale brown, with the usual 

 Stauropus apical mark. 



Expanse 47 mm. 



Hob. Damba Island, on the Equator in the Victoria 

 Nyanza, 20 miles south-east of Entebbe. 



Type in the Oxford Museum. 



Dr. Carpenter found the larva on April 12th ; it spun up 

 on the 14th of that month, and the imago emerged on 

 May 2nd following. 



