176 ANCISTROSYRTNX, DRILLIA. 



synonyms. The latter is probably erroneously assigned to 

 Panama, on Cuming's authority ; it is evidently a young shell, and 

 that Reeve should have placed it in Pleurotoma is suggestive. 



Japan. 

 Yar. SPINICINCTA, von Martens. Fig. 99. 



Chestnut-brown, surface rougher, whorls 9, instead of 7-8, 

 spines longer, more numerous, with oblique rows of short spines 

 upon the canal. L. 67, diam. (without the spines) 14*5 mill. 



W. Australia. 



Genus ANCISTROSYRINX, Dall, 1881. 



Shell with the posterior surface of the whorls concave, with 

 a broad deep sinus, bordered externally by a pectinated elevated 

 frill, directed backwards. 



A. ELEGANS, Dall. 



Shell with the canal about the same length as the spire, acutely 

 tapering before and behind ; white ; whorls nine, of which two 

 are embryonic ; aperture very long and narrow ; anterior surface 

 of the whorls everywhere sculptured with even uniform spiral 

 rows of rounded nodules beautifully reticulated by the lines of 

 growth ; one row about the middle of the whorl slightly elevated 

 above the others ; carina fringed with delicate triangular points ; 

 posterior surface of the whorls, except for lines of growth, 

 smooth, with one row of nodules just inside the carina; canal 

 straight, columella not thickened, but somewhat twisted anteri- 

 orly, outer lip sharply angulated by the carina. 



L. 27 mill., of which 12 mill, are behind the carinal notch ; 

 max. width, 12 mill. ; width of aperture, 4 mill. Defl. 45. 



Florida Reefs (Pourtales) ; off Havana (Agassiz). 



Unfigured. 



Genus DRILLIA, Gray. 



Section BRACHYSTOMA, Swain son. 



A. Alatae. 



^ 



D. STROMBOIDES, Sowerby. PI. 10, fig. 58. 



Shell with a sutural band, and oblique longitudinal ribs below 

 the periphery, sculptured by revolving lines, which are some- 

 what granular towards the base of the body-whorl ; aperture 



