48 SYRIAN MOLLUSCAN FOSSILS. 



IV, p. 341, PI. xvii, figs. 1 a, b, c, 1S3G) from the G-reensand of Blackdown, 

 when compared with ours, show a resemblance equally striking. They too 

 have, upon the beaks, concentric wrinkles similar to those of Abeihensis, but 

 smaller; and the two species in other respects differ little externally, ex- 

 cept that the anterior part of rostrata is somewhat longer, and its lunule 

 deeper, though margined in the same way. 



While inclined to believe that tbis species belongs to the family Gyprimdae, 

 1 refer it with less confidence to VeniUeardia, and not without the feeling that 

 it may prove to be a Ct/pricardia. 



Local/'/// ami Position. — Vicinity of Abeih. Fraas makes his Astarte Liha- 

 notica to be one of four characteristic fossils of the Sandstone stage of the 

 Cenomanian (see pp. G, 7). If not identical with Libaiwtica, this species, 

 which was taken from sandstone, probably belongs to the same horizon. 



Cardiurn (Acanthocardia) Syriacum Conrad. 



Plate III, figs. 7 a, b, c. 



Cardium Syriacum Conrad, 1S52, Official Report, p. 217, PI. vii, fig. d-5. 



Nucleus oblique cordiformis, incequilateraHs, altiiudine hngitudinem muUo super- 

 ante ; antice ml marginem /rule curvalus, postice subrectus : declivitas posticaMs 

 abrupta, lulu, applanata, suleis umbonalibus incavata ; umbones tumidi porrecti ; 

 apices antemediani, attenuati, acuminaU, approximati {in testa sane contigui): regio 

 lunularis impressionibus profundis dentium JateraUum anteriorum notata ; lunula 

 magna, cordiformis, paululwm impressa, sulco levi terminata. 



Internal cast obliquely heart-shaped, inequilateral, much higher than 

 long; gently curved at the front margin, the hinder being nearly straight: 

 posterior slope abrupt, broad, flattened, grooved with furrows on the um- 

 bones; umbones swollen, long ; beaks placed before the middle, attenuate, 

 pointed, approximate (in the complete shell doubtless in contact): lunular 

 region marked by deep impressions left by the anterior lateral teeth; lunule 

 large, cordate, superficial, bordered by a slight furrow. 



Twelve casts. Dimensions of the specimen figured, and of a larger im- 

 perfect cast : — 



Of the former: length, 29J mm. ; height, •">! nun. : thickness, 27 nun. 

 Of the latter: " 33 mm.; " 40 mm. ; " 32 mm. 



Although Conrad's description is inadequate, }^et so marked is the agree- 



