70 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



Affinities. — This species differs from Truncatida tetragona Micli- 

 elin, 184G, which it very much resembles in the great separation of 

 the pinnules, in the great divergence of the pinnules, spreading out 

 over the zoarial trunk, in the larger number of nematopores, and 

 in the greater zoarial dimensions. 



Fig. 14. Truncatula vendocinensis, new species. 



A. Longitudiiuil section, X IG, showing tlie tliiclc walled nematopores of the 

 basal surface, to tlie left, 



B. A meridian section, X 3G, passing through the pinnules on each side. 

 Cretaceous (Sautonian) : Vendome (Loir-et-Cher), Fi-ance. 



Occun'rence. — Cretaceous (Santonian) : Vendome (Loir-et-Cher), 

 France, 



C'o^ype,— Canu collection and Cat, No, 68991, U.S.N,M. 



Genus DISCOCYTIS D'Orbigny, 1854. 



1854. Discocytis 

 vol. 5, p, 1061. 



D'Orbigny, Paleontologie frangaise, Terrain Cretace, 



The ovicell is ovoid, very large, placed exteriorly between two 

 pinnules. The tubes are subcylindrical and long, without peristome, 

 with elongated orifice, opening at the extremity of the pinnules and 

 from the exterior side. The dorsal (exterior face) is surrounded by 

 a thick layer of nematopores with thick walls. The cupuliform 

 zoarium consists of a flat base with a narrow peduncle, and a broad 

 cup shaped or funnel shaped head, which is composed of numerous 

 radiating bundles (=pinnules) of zooecia. 



Genotype. — Discocytis (Pelagia) eudesi Michelin, 1844. 



Range. — Cenomanian-Campanian. 



