248 



DESCRIPTIONS OF NEW SPECIES OF MARINE SHELLS 

 FROM SOUTH AFRICA. 



By EDGAR A. SMITH. 



(Read Lefore ihe Society, September loth, 1902). 



Plate IV. 



1. Natica kraussi. (PI. IV., fig. i). 



Testa globosa, perspective ii/nbUicata, albida, zonis duabus vel tribus 

 interruptis fuscescentibus vel rtifescentibus cincia, epidermide tenui 

 olivacea indiita, striis spiralibiis teiniibus sculpta, Uneisgiie incrementi 

 obliqids striata ; anfradus quinqiie^ cehriter accrescentes, convexi, 

 sutura profunda fere canaliculata sejitncti, ultinius antice vix descen- 

 dens ; apertura setiii-circularis, alba, zonis externis plus minus con- 

 spicuis ; columella rectiuscula, super iie callosa, incrassata ; callus in 

 uinbilico niediocris, ascendens. Operculum corneuui, flavescens, pauci- 

 spirale, incrementi lineis striatum, ad suturavi leviter carinatuni. 

 Diam. major \b\mm., min. 14, alt. 15. 



Hab., Durban, Natal (Burnup); Mauritius (Robillard in Erit. Mus.). 

 The transverse colour-bands are not very conspicuous in some speci- 

 mens, and are usually more or less interrupted into series of spots. 

 The uppermost is a little below the suture, the second about the 

 middle of the body-whorl, and the third upon the base. The spire is 

 a little raised, and the apex stained with a brownish tint. The spiral 

 striae are distinct and rather deeply incised in tlie type, and they are 

 visible upon and beneath the periostracum. In other examples they 

 are finer and less conspicuous. Type in British Museum. 



2. Assiminea umlaasiana. (PI. IV., fig. 3). 



Testa ovata, supra acuminata, solida, iniperforata, pallide fuscescens, 

 IcBvis, subnitens ; anf -actus sex convexi, sutura leviter obliqua sejuncti, 

 ultimus haud descendens, ad peripheriani obsolete obtuse subangulatus ; 

 apertura piriformis, longit. totius \ haud cequans ; peristoma intus 

 leviter incrassatum, margine columellari calloso, antice crassissimo, 

 effuso, Longit. 3^ mm., diam. 2 h. 

 Hab., in caves in the ocean cliff about half-a-mile south of the 



mouth of the Umlaas River, Natal (Burnup). 



Remarkable on account of the very much thickened anterior part of 



the columella. With the exception of delicate oblique lines of growth 



the shell is smooth. Type in British Museum. 



3. Astralium (Bolma) andersoni. (PI. IV., fig. 7). 



Testa turbinata, turrita, imperforata, roseo-purpurea, apicem versus 

 pallida, albo nigroque variegata ; anfractus sex, supra declives, in 

 medio angulati, ad angulum nodosi, infra ad suluiam carina ti, et 



