







&-y 





SNI ! 





£\ 





|c| 





re/ 





/ 





IES 



1SNI 



ES 



IES 



GC 



SNI 



ES I 



54 CONTRIBUTION TO THE PALEONTOLOGY OF TRINIDAD. 



Locality. — Southern main road just south of Pitch Lake, Brighton, Trinidad, 

 in a yellowish-brown, ferruginous marl. 



Geological horizon. — Oligocene, probably a rather late stage of that period. 



Genus CRASSATELLITES Kruger, 1823. 

 Crassatellites sp. indet. Plate IX, Figure 4. 



In the black shales near Coycuar, Venezuela, are a number of very small 

 shells with the marked umbonal-basal carination, and strong concentric groovings 

 characteristic of the young of Crassatellites. 



They are therefore tentatively referred to this genus. 



Locality. — On the trail from Parare to Coycuar, about six miles south of 

 Parare and three south of Caituco, Venezuela. 



Geological horizon. — Basal Upper Cretaceous? 



Genus CARDIUM Linnseus, 1758. 

 Cardium (Trigoniocardia) carolinae new species. Plate IX, Figures 5, 6. 



Description. — Shell small, convex, triangularly cordate, anterior margin 

 sloping in a rounded curve to the basal margin, posterior margin truncated; 

 shell divided, by a prominent carina extending from the beak to the posterior 

 end, into a body area and a truncated posterior area; ribs on the body nine, 

 rather sharp-edged, ornamented by bead-like nodules which on the four ribs 

 towards the carina are on the carina side of each rib, on the remaining five ribs 

 the beads are nearly central; ribs on the truncated area eight, more crowded, 

 less elevated, squamose rather than beaded; interspaces on the body much 

 narrower than the ribs, except the space beside the carinal rib, which is wider 

 than the others, and is beautifully and conspicuously marked by the cross striae 

 of lines of growth which also cross the other interspaces, but there are hardly 

 seen except with a lens. 

 ' Height of shell 11, greatest width 7, diameter 8 mm. 



Remarks. — This exquisite little shell is closely allied to Dr. Guppy's Cardium 

 castum from the Manzanilla beds, 30 but that species has twenty-two stout 

 rounded ribs, and the posterior slope near the beak is different. In general 

 form also it has a resemblance to Cardium maturense Dall from the Pliocene of 

 Matura, Trinidad, and to C. aiminense Dall from Santo Domingo Oligocene beds. 



The species is dedicated to Mrs. Arthur C. Veatch, of Washington, D. C. 



Locality. — Along the shore one thousand feet west of the pier at Brighton, 

 Trinidad, in asphalt. 



Geological horizon.— Upper Oligocene about Chipolan. 



Genus PROTOCARDIA Beyrich, 1845. 

 Protocardia coycuarensis new species. Plate IX, Figure 7. 



Description. — Shell of moderate size, nearly equilateral, subcircular in outline; 

 posterior surface ornamented by fifteen radiating ribs; anterior sculptured only 

 *> Quart. Jour. Geol. Soc. London, vol. XXII, p. 582, pi. XXVI, fig. 4, 1866. 



CD 



C/> 



U) 



SJV 



NVI 



