138 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. June 17, 



Single valves of adult shells, with massive hinge-areas in a similar 

 matrix with the Corals, Nos. 2, 3, and 6. 

 Loc. Soudaxioxia. 

 Presented by the Imperial School of Mines, St. Petersburg. 



34. Gryph^ea incurva, Sowerby. 



Associated with Ammonites, Nos. 40, 41, and 42, in reddish marly 

 limestone with ferruginous granules. 

 Loc. Village of Biasali. Middle Lias. 



Section Siphonida. 



35. Cardium ^equistriatum, sp. nov. PI. VIII. fig. 6, #, h. 



Shell subtrigonal, convex ; umbones prominent and contiguous 5 

 anterior surface ornamented with concentric and very regular small 

 ridges, posterior portion with radiating longitudinal lines, widely 

 distant at the margins. 



It differs from Cardium truncatum of the Lias in being less con- 

 cave, and its radiating posterior lines are more widely distant, and the 

 concentric ridges more defined and regular, the umbones being placed 

 nearest the posterior side. 



Dimensions. — Height p ths, breadth i%ths of an inch. 



Loc. Woronzoff Road. Lower Lias. 



36. Astarte complanata, Roemer, Verst. pi. 6. f. 28. 

 Associated with the Cardium last described, No. 35 ; Ostrea, 



No. 31, and Terebratula numismalis, No. 18. 



Loc. "Woronzoff Road leading to Kamara. In dark-brown shales. 

 Lower Lias. 



Gasteropoda. Holostomata. 



37. Natica, sp. A large species allied to Natica Clio, D'Orb. Ter. 

 Jur. pi. 292, but too imperfect for description. 



Loc. In red clay of Jurassic limestone between the Monastery 

 and Balaclava. 



Dimensions. — Height %jfo inches, breadth 1-j^- inch. 



38. Nerin^ea grandis?, D'Orb. 



A fragment of what appears to be this species. 



Loc. Village of Djanatai. 



Presented by the Imperial School of Mines, St. Petersburg. 



Cephalopoda. Tetrabranchiata. 



39. Ammonites Uralensis?, D'Orb. in Geol. of Russia. 



A fragment of apparently a young individual of this species from 

 red Jurassic limestone. 



Loc. Bathing-place one mile west of Balaclava. 



40. Ammonites Raquinianus ?, D'Orb. Ter. Jur. pi. 106. 



A fragment of what appears to be this species, although somewhat 

 doubtful, obtained from the same matrix as the next species, No. 41. 

 Loc. Village of Biasali. Middle Lias. 

 Presented by the Imperial School of Mines, St. Petersburg. 



41. Ammonites Jurensis?, Zieten ; D'Orb. Ter. Jur. pi. 100. 



