ART. 10 CRETACEOUS FAUNAS OF THE CAROLINAS STEPHEJSTSO ^T 17 



Dorsal margin long and slightly arched behind the beak, short and 

 concave in front of the beak; anterior margin sharply rounded; 

 ventral margin broadly and regularly rounded; posterior margin 

 subangular below, truncated, slightly concave, sloping obliquely 

 forward and rounding into the dorsal margin above. 



Surface marked by concentric growth lines which become rather 

 coarse back of the umbonal ridge, and by several stronger concentric 

 channels which mark resting stages in growth. 



ReTnarhs. — This species differs from its nearest known relative 

 Veniella {Etea) carolinensis (Conrad), in its markedly greater size 

 and relatively greater height, and in the pronounced arching of the 

 umbonal ridge. 



Locality. — From the new Rocky Point quarries, a mile northeast 

 of Eocky Point station, Pender County, IST. C. Collected by L. B. 

 Kellum in 1923. 



Geologic position. — Upper Cretaceous, upper part of Peedee for- 

 mation, upper part of Exogyra costata zone. European equivalent, 

 upper Senonian (Maestrichtian). 



Type material. — The material is in the United States National 

 Museum and includes the holotype, a right valve. Cat. No. 73436, and 

 three internal calcareous sandstone casts, Cat. No. 73437, one of 

 which has clearly impressed upon it the concentric markings of the 

 outer surface of the shell. 



CRASSATELLITES CARD LIN ANA. new species 



Plate 7, figs. 1, la, 2 ; plate 8 



Description. — Shell large, elongate, inequilateral, moderately con- 

 vex. Beaks prominent, incurved, slightly prosogyrate, situated about 

 0.37 the length of the shell from the anterior end. Umbonal ridge 

 nonprominent. Dimensions of the holotype, a left valve: Length, 

 64 mm. ; height, 48 mm. ; convexity, 15 mm. Dimensions of a well- 

 preserved right valve: Length, 66 mm.; height, 52 mm.; convexity, 

 16 mm. 



Hinge of left valve with two cardinal teeth, the anterior one 

 strong and trending obliquely forward, the posterior one nearly 

 vertical in trend, thin above, becoming stronger and more prominent 

 below, the two cardinals separated by a deep somewhat expanding 

 socket lined on the sides with fine transverse striations. Hinge of 

 right valve with one strong prominent cardinal tooth sloping 

 a little forward in front of the resilifer, and a very weak 

 anterior cardinal sloping strongly forward in front of a 

 socket of only moderate depth. No true laterals are present, but 

 the margins of the shell under the lunule and under the escutcheon 



