98 



Annals of the South African Museum. 



MARGINELLA BBOCKTONI, n. sp. 



Shell five whorls, oblong ovate, pale maize colour, somewhat 

 diaphanous, highly polished with margin, base, and suture of a pale 

 fulvous brown. Spire exserted, obtusely conical. Suture but 

 moderately impressed. Whorls slightly convex. Columella with 

 three very oblique plaits. Aperture long and narrow, but broadening 

 at base. Outer lip curved back at the shoulder and the base, slightly 

 margined, smooth within. There is the indication of a callus at the 

 shoulder. Base somewhat recurved. 



Long. 17 mm. ; max. diam. 8 mm. 



Hab. Cape Point (S. Africa), N. 50 E., 18i miles, 180 fathoms, 

 2 specimens, s.s. Piefer Faure. 



This species, except for the plicae, has some likeness to biplicata, 

 Kr., but is double the size of that species. It has also some resem- 

 blance to succinea, Conrad. The specific name is chosen out of 

 respect for Mr. J. E. le Brockton Tomlin, whose researches on the 

 genus are well known. 



The type specimens of both species are in the S.A. Museum 

 (Nos. A1954 and A1956 respectively). 



