1857-] BAILY FOSSILS FROM THE CRIMEA. 137 



Allied to Rhynchonella subtetrahedra, Dav. (Monog. Brit. Ool. 

 Lias, Brach., Pal. Soc. p. 95. pi. 16. f. 9-12), but differs in the 

 greater number of plaits, and in its greater breadth compared with 

 its length. It has a winged appearance, and belongs to the group 

 Alatce of Von Buch. 



The specimens, of which there are two, were collected from the 

 grey limestone of Balaclava by Major Cooke, to whom it is dedi- 

 cated. 



26. Rhynchonella pectinata, sp. nov. PL VIII. fig. 4, a y b. 

 Shell inequivalve, subtrigonal, slightly convex, longer than wide, 



widest at the front and gradually tapering upwards towards the 

 beak ; beak acute ; foramen large, surrounded by the deltidium, and 

 separated from the umbo ; valves somewhat flattened and fan-shaped, 

 without mesial fold or sinus ; surface ornamented by about twelve 

 large plaits or costse. 



Dimensions. — Height -poths, breadth -j%ths of an inch. 

 Allied to R. pectunculoides, Schlot., but differing in its greater 

 length in proportion to its breadth, and in having more costse. 

 Loc. Gorge of Iphigenia, in red crystalline limestone. 



27. Rhynchonella senticosa, Von Buch ; Davids. Brit. Ool. 

 Lias, Brach., Pal. Soc. p. 73, pi. 15. f. 21. 



Mr. Davidson describes this species from the lowest beds of the 

 Inferior Oolite. M. D'Orbigny places it in the Oxfordian. Our 

 specimen was collected by Major Cooke from the grey limestone of 

 Balaclava, apparently equivalent to Inferior Oolite. 



28. Rhynchonella acuta, Sow. 



From the matrix of Ammonites Jimbriatus. 



Loc. Village of Biasali. Middle Lias or Marl-stone. 



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



29. Rhynchonella variabilis?, Schlot. 



Of this species the back of the rostral valve only is exposed, on a 

 slab of coarse greyish limestone. 



Loc. From the base of the rocks at the Gorge of Iphigenia. 



Lamellibranchiata. Asiphonida. 



30. Ostrea. Small species in a light-brown marl, with but few 



other traces of fossils. 

 Loc. From Karani. Lias shale ? 



31. Ostrea, sp. Associated with Cardium cequistriatum, No. 35, 

 and Terebratula numismalis, No. 18. 



Loc. "Woronzoff Road leading to Kamara. Lower Lias shale. 



32. Ostrea, sp. A coarsely plicated species in the red clay of the 

 Jurassic limestone, associated with Corals, No. 4, spines of 

 Echini, Nos. 13, 14, and Terebratula, No. 21. 



Loc. Bathing- place one mile west of Balaclava. 



33. Gryph^a dilatata, Sow. 



