152 GEOLOGY AND PALEONTOLOGY OF THE WEST INDIES. 



Argyrotheca dalli, new species. 



(Plate 16, Figures 5 a-c.)  



The following is a description of this species: 



Shell minutely punctate, with many simple, rounded ribs increasing in 

 number by intercalation; dorsal valve flat; ventral valve inflated; cardinal 

 areas high, triangular in ventral valve, linear in dorsal valve; delthyrium 

 (probably) triangular; median septum of dorsal valve high in front, nearly 

 meeting the opposite valve, very low at beak. 



Alt. of ventral valve, 13.3 mm.; alt. of dorsal valve, 10 mm.; width, 12.5 

 mm.; diam., 7 mm. 



Guppy 1 lists Argiope clevei Davidson from St. Bartholomew, but I 

 have been unable to find any other reference to that species. It may 

 be the form here described. 



Localities. — Point between Anse Ecaille and Anse Lezard and point 

 between Colombier Point and bay next St. Jean Bay, St. Bartholomew, 

 stations 6897 a, b, Vaughan. 



Geologic horizon. — Upper Eocene. 



Type.—U. S. Nat. Mus. No. 167201. 



Liothyrina vaughani, new species. 

 (Plate 16, Figures 1 a-c.) 



The following is a description of this species: 



Shell large, inflated, glabrous; dorsal valve suborbicular, ventral valve ovate, 

 occasionally prolonged in a linguiform projection filling a corresponding emar- 

 gination in the dorsal valve; beak closely incurved; foramen small, circular. 



Length, 43 mm.; breadth, 36 mm.; thickness, 18.5 mm. 



This species was identified as Terebratula carneoides Guppy by 

 Cleve, 2 but the beak of Liothyrina vaughani is more closely incurved 

 than that of any previously described species from the American 

 Tertiary. 



Locality. — Northwest side of St. Jean Bay, St. Bartholomew, station 

 6924, Vaughan. 



Geologic horizon. — Upper Eocene. 



Type.—U. S. Nat. Mus. No. 167202. 



BRACHIOPODS FROM TRINIDAD. 



For the sake of completeness, references are included to 3 species of Lio- 

 thyrina from San Fernando, Trinidad. The types are in the collection of 

 the U. S. National Museum. 



Terebratula trinitatensis Guppy, Quart. Journ. Geol. Soc. London, vol. 22, p. 296, plate 19, 



figs, la, lb, 1866. 

 Terebratula carneoides Guppy, loc. cit., p. 296, plate 19, fig. 2, 1866. 

 Terebratula lecta Guppy, loc. cit., p. 296, plate 19, fig. 3, 1866. 



1 Guppy, R. J. L., Geol. Mag., Dec. 2, vol. 1, p. 443, 1874. 



2 K. svenska Vet.-Akad., Handl. Bd. 9, No. 12, p. 26, 1871. 



