62 SYRIAN MOLLUSCAN FOSSILS. 



Locality and Position. — Beirut district. Not known to Fraas, but found 

 by Lartet asses rSpandue en Palestine. Since Coquand refers it, iu Algeria, 

 to the same horizon {V Stage rhotomagien) with the last species, like that it 

 is probably from the zone of Ammonites Syriacus, in Lebanon. 



Vola s P . ! 



A single incomplete lower valve, less convex than the last two and pro- 

 portionally wider. Length, about 45 mm. ; height, about 50 mm. The ribs 

 are about twenty in number, and are wide, except those of the anterior and 

 posterior sides, which are narrower. All are very flat, and would entitle the 

 species to the name of Vola planicosta if the specimen were complete enough 

 to warrant a specific description. The upper (left) valve is unknown to us. 

 Coll. Merrill. 



Locality and Position. — Beirut district ; from a chalky marl, probably 

 Senoniau. 



Ostrea Syriaca? Conrad. 



Ostrea Syriaca Conrad, Official Report, p. 212, PI. ii, %. 12. 



Two complete specimens of a small 0}'ster, adhering to each other and 

 giving evidence of having been attached at the umboues. They answer 

 better to the description of this species than to that of any other. Greater 

 diameter of the larger, 47 mm.; of the smaller, 45 mm. Coll. Thomson. 



Local//// itml Position. — Probably from the Beirut district ; from a yellow 

 marl, Turonian. 



Ostrea (Alectryonia) alicula, sp. nov. 



Plate VI, figs. 3 a. b. c. 



Testa oblique cuneiformis ; valva superior fere plana, ad cardinem versus pau- 

 lulum convexa et concenirice tenuiter lamellosa, alioqui ri.r concava et plicis radiantibus 

 />///< demissis nonnunquam dichotomis notata ; valva inferior alte fornicata, umbone 

 producto qffiza, cosiis angustis acutis crebris dichotomis munita. 



Shell obliquely cuneiform ; upper valve nearly Hat, towards the hinge 

 somewhal convex and concentrically delicately lamellose, for the rest slightly 

 concave and having the lamellae crossed by wide. low. radiating folds, some- 

 times dichotomous ; lower valve highly arched, affixed by (lie elongated 

 umbo, and furnished with narrow, sharp, close-set dichotomous ribs. 



Two specimens, both figured. Dimensions of the right-hand individual of 

 the doublet: length, lb mm. ; height, 40 nun.: thickness, 15 mm 



