374 SOWERBY : MARINE SHELLS OF SOUTH AFRICA. 



PELECYPODA. 



Basterotia obtusa Sowb., n. sp. 



Testa ceqiiivalvis, incequilateralis, quadrato-siihovata, leviter 

 inflata^ antice abbreviata, rotiinde tnoicata, postice obtuse 

 angiilata, oblique prodiccta, sordida, coucentrice dense striata. 

 Umboues approxiuiati, leviter prominentes. Car do ifi titraque 

 valva deutein tinicum valde productum, leviter exciirvatum, 

 postice lamina abbrevitata crassiuscula angulato-elevata 

 muiiitus. Impressiones viusculares vix perspicua. 



Antero-post. 12, umbono-marg. 8 millim. 



Hab. Durban. 



The genus Basterotia Mayer in Homes ('Die Fossilen 

 MoUusken des Terticer-Beckens von Wein,' vol. iv., p. 40, 

 pi. 3, fig. II a-g, 1859) was founded on a fossil species 

 B. corbuloides Mayer. The recent type is Corbula qnad- 

 raia Hinds {'Proc. Zool. Soc.,' 1843), for which Recluz 

 proposed the generic name of Eucharis ('Journal de Con- 

 chyliologie,' vol. i., p. 168, 1850); name pre-occupied by 

 Latreille in 1804. The new species Basterotia obtusa re- 

 sembles B. corbuloides in form, but instead of a keel from 

 the apex to the posterior margin, it has only a very obtuse 

 rounded angle. 



Pandora dissimilis Sowb., n. sp. 



Testa fere crquivalvis., ifia^quilateralis, oblonga conpressa, pos- 

 tice lalior, antice angustior, utrinque obtuse subafigulata ; 

 extus sordida, concefitrice irregulariter rugata. Margo dor- 

 salis acutus ; anticus curtus leviter declivis ; posticus lo/igus 

 rectiusculus ; lunula nulla. Aiargo ventralis leviter fiexuo- 

 sus. Valvis utrinque leviter hiantis. Umbones acuti. Cardo 

 lira longa crassiuscula, oblique descendens, ligamejttum fer- 

 ente ; in valva dextra dente imicus elevatus claviforniis 

 instructus. Pagina interna margaritacea iiidescens ; im- 

 pressiones musculares duce subcirculares. 



Antero-post. 4^, unibono-matg. 2J millim. 

 Hab. Sea Pointy Cape Town. 



After some hesitation I have decided to place this 

 remarkable species in the genus Pandora. It differs very 



J.C., vii., Apr. 1894. 



