1855.] BAILY SOUTH AFRICAN FOSSILS. 457 



Shell compressed, nearly circular, smooth, with 6 whorls, flattened, 

 rounded towards the keel, abruptly and perpendicularly depressed at 

 its umbilical margin ; umbilicus wide ; back keeled ; the sides ob- 

 liquely and faintly striated ; aperture oblong, compressed. 



This characteristic Ammonite (named after the discoverer) belongs 

 to the section Lcevigati, established by Prof. E. Forbes, and is nearly 

 related to Ammomtes Remhda from Pondicherry. The prismatic 

 colours of the nacre are still preserved. 



Locality. — "White-men's Houses," coast of S. Africa, near the 

 Umzambani River, in compact siliceous grit containing numerous 

 fossils, and in soft greenish sandstone. 



Genus Baculites, Lamarck. 



Of this characteristic cretaceous genus there are three specimens, 

 of, I believe, one species only, associated with a furrowed Poromya 

 in a soft greenish sandstone. 



Baculites sulcatus, nov. sp. PI. XI. fig. 5. 



B. testa ovata, subcompressa, Isevi vel transversim undulata ; dorse 

 leviter compresso ; ventre crassiore, obtuso ; apertura obliqua, 

 sinuata ; septis lobatis. 



Length of the most entire specimen, 2 inches. 

 Greatest breadth, ^ths of an inch. 

 Thickness, ^ths of an inch. 



Shell elongate, ovate in section, rather flattened, broadest at the 

 aperture, and slightly tapering ; with smooth transverse undulations, 

 strongly marked near the aperture, and gradually becoming lost 

 towards the lower extremity ; back slightly compressed, ventral side 

 rounded ; aperture very oblique ; septa lobed. 



This species appears to be distinct from, although closely allied to, 

 Xhe Baculites anceps, figured by D'Orbigny from the Craie Chloritee, 

 and differs from it in the greater rotundity of the dorsal side, and 

 greater angularity of the transverse undulations, the section exhibit- 

 ing a form more nearly approaching that of Baculites Faujasii from 

 the Chalk of Ireland. 



The shell is partly preserved, showing its prismatic colours. 



Locality. — Cliffs of the coast of S. Africa, near the Umtafuna and 

 Umzambani Rivers. 



Gasteropoda. 



Genus Solarium, Lamarck. 



Solarium pulchellum, nov. sp. PL XII. fig. 3. 



S. testa discoidea, spira parva, anfractibus 5, rotundatis, longitudi- 

 naliter transversimque striatis ; umbilico parvo, externe crenulato ; 

 apertura rotundata. 



Diameter, y^o^ths of an inch. 



