1855.] BAILY — SOUTH AFRICAN FOSSILS. 463 



Small bivalve shells of what appear to be the following genera, 

 but too indistinct to determine specifically, were also included in this 

 collection : — 



CoRBULA ; like C. carinatay D'Orb. 



PoROMYA?; furrowed form. 



LuciNA ; like L. caperatay from Blackdown. 



Pectunculus. 



Cardium. 



LUCINA, NUCULA, ASTARTE, and SOLECURTUS? 



ECHINODERMATA. 



Genus Hemiaster, Desor. 



Hemiaster Forbesii, nov. sp. PI. XII. fig. 1. 



This, the only Echinoderm in the collection, is deprived of nearly 

 all trace of its test ; some fragments, however, accompany it with the 

 tubercles and pores well preserved. 



The contour is broadly cordate, with the greatest elevation poste- 

 riorly, and slightly declining anteriorly. The dorsal ambulacra are 

 widely petaloid, very unequal, and all lodged in deep excavations. 

 The antero-lateral ones are l^ time as long as the posterolaterals. 

 The latter are broadly ovate and have about 20 pairs of pores in each 

 row. The antero-laterals are oblong ovate, and have about 30 pairs 

 of pores in each series, lodged in rather broad transverse grooves. 

 The hollowed-out portion of the odd ambulacrum is very broad and 

 extends round to the mouth. The elevated spaces between the petals 

 are narrow, and as if pinched up. The sides are very prominent ; 

 the caudal extremity is obtuse ; the vent is obscured. The mouth is 

 transversely oval. A fragment of the shell of another specimen of 

 this species, from between the anterior and posterior ambulacra, is 

 covered with slightly scattered small equal tubercles, the interspaces 

 being granulated. The specimen is not sufficiently perfect to distin- 

 guish its fasciole. 



Length 1 inch ^th. Breadth 1 inch ^ths. 



Dedicated to the late Professor Edward Forbes, who has added so 

 much to our knowledge of this class of animals, both recent and 

 fossil, and by whose much-lamented death science has lost one of her 

 most able advocates. 



Locality. — Cliifs of S. African coast, near the Umtafuna and Um- 

 zambani Rivers. 



PISCES. 



Placoid Order. Squaloid Family. 



CoRAX. Represented by a tooth, nearly allied to C incisusy 

 Egerton *, from Pondicherry. 



Locality. — Cliffs of S. African coast, near the Umtafuna and Um- 

 zambani Rivers. 



* Trans. Geol. Soc. 2 ser. vol. vii. p. 92. 



