144 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [June 1 7, 



SlPHONIDA. 



80. Cardium protractum, Eich. Voy. Horn. pi. 6. f. 6-8. 

 This small species is common at most of the localities. 



Loc. Dock-yard, Sevastopol ; Quarantine ; Monastery ; and Gorge 

 of Iphigenia. 



81. Cardium amplum, sp.nov. PI. IX. fig. 2, a-d. 



Shell thin, much broader than high, ornamented with about fifteen 

 much elevated radiating ribs, which are strongly imbricated towards 

 the margin, and unequally distant, widely separated and more curved 

 towards the posterior slope of the shell, where the costse become 

 suddenly closer ; umbones subcentral, margins crenulated, hinge-line 

 long and but slightly curved ; right valve with a slightly prominent 

 cardinal and two lateral teeth. 



Dimensions. — Height ^ ths, breadth f^ths of an inch. 



The only specimen of this small and delicate species is a very per- 

 fect right valve. 



Loc. Monastery of St. George. 



82. Cardium Demidoffi, sp. nov. PI. IX. fig. 3, a, b, c. 



Shell elongated, subtrigonal, ornamented with about twelve widely 

 distant and sharp ribs, closely imbricated and less prominent on the 

 posterior slope of each valve ; umbones anterior and approximating, 

 margins crenulated. 



Dimensions. — Height -^-ths, breadth -^ths of an inch. 



Very abundant from the Monastery of St. George (in the bed R 

 of the section) ; mostly casts of the interior. Our figured specimen 

 has a portion of the shell still attached. 



This species differs from Cardium Fittoni by its greater breadth 

 in proportion to its height, and in having more numerous and less 

 elevated ribs, without the sharp and prominent asperities of that 

 species. 



Dedicated to M. Anatole Demidoff, author of the fine work on 

 Southern Russia and the Crimea. 



83. Cardium Fittoni, D'Orb. in Murchison's Geol. of Russia. 

 Loc. Sevastopol ; Monastery. Casts collected by Major Cooke 



and Capt. Cockburn ; and, with the shell attached, from the Quaran- 

 tine Harbour. 



84. Cardium carinatum, Desh. Mem. Soc. Geol. de France, 1838, 

 p. 54. pi. 2. f. 16-18. 



Loc. Kertch. In iron-ore. Collected by Dr. M'Pherson. 



85. Cardium squamulosum, Desh. ibid. p. 48. pi. 1. f. 14, 15. 

 Loc. Kertch. In iron-ore. British Museum Collection. 



86. Cardium macrodon, Desh. ibid. p. 49. pi. 1. f. 3-6. 



An interesting specimen of this nearly smooth Cardium, in which 

 the shell has been converted into phosphate of iron, the interior con- 

 taining crystals of carbonate of lime. 



Loc. Kertch. In iron-ore. Collected by Dr. M'Pherson. 



