48 SYRIAN MOLLUSCAN FOSSILS. 



IV, p. 341, PI. xvii, figs. 1 a, b, c, 183G) from the Greensand 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 rosirata is somewhat longer, and its lunule 

 deeper, though margined in the same way. 



While inclined to believe that this species belongs to the fiiniily Cf/primdcc, 

 I refer it with less confidence to VenUicanlia, and not without the feeling that 

 it may prove to be a C//pricardia. 



Loculitij and 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 Libanotica, this species, 

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



Cardium (Acanthocardia) Syriacum Conrad. 



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



Cardium Syriacum Conkau, 1S52, Official Kcport, p. 217, PI. vii, fig. 45. 



Nucleus oblique cordiformis, inceqidlateralis, nltiiudine longitudhmn midto siqjer- 

 ante ; ardice ad marginem lenle curvatus, jfostice subrccfiis : decKvitas posiicalis 

 abntpta, lata, applanata, sidcis mnbonalibus incavata ; iimbones tumidi porrccti ; 

 apices anfemedkmi, aUemiati, aciiminuli, approximati [in teslu sane contigid) : rcgio 

 lumdaris impressionibus pivfttndis dcntium latcralium anteriormn notata ; liimda 

 magna, cordiformis, paididum impressa, suico Icvi 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 

 i-egion 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, 29i mm. ; height, .'51: mm. ; tliickncss, 27 mm. 

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



Although Conrad's description is inadequcate, yet so marked is the agree- 



