142 



Bulletin 35 



290 



PAPER No. 19. 



PRELIMINARY NOTICE OF A DISCOVERY OF FOS- 

 SILS IN THE TAMANA DISTRICT, TRINIDAD. 

 Dept. of Agr., Trinidad ; Bull. Agr. Inform., Jan. -Apr., 



1909, pp. 55-56 with plate. 



Page 55 



Mr. P. W. Jarvis, of the Colonial Bank, has been kind 

 enough to furnish me with some samples of fossiliferous rock 

 from Maehipur near Montserrat in the Tamana district. These 

 samples are an indication of the richness of that locality in fossils, 

 and no doubt many remarkable and interesting deposits will be 

 found in the district. The present collection contains corals so 

 highly altered by fossilization as to be scarcely determinable. 

 They are like some of those described by P. M. Duncan from 

 West Indian localities, and better specimens may hereafter be 

 found admitting of specific determination. Most of the specimens 

 are a coral limestone, and in the interstices of this is found a cal- 

 careous jsandy deposit containing numerous foraminifera polyzoa 

 and echinoderm remains, none of which are in a state for identi- 

 fication except for one foraminifer, namely Ampkistegina, and 

 this occurs abundantly, but of small size. The most interesting 

 fossil is a crab, of which I append a description. Among mol- 

 luska there is an olive and a concentrically-ribbed bivalve which 

 might be a Venus, but the hinge and interior are not visible. A 

 small imperfect bivalve seems to be a Limea. 



Ranina cuspidata. — New Species. 



The Carapace is rather evenly convex and the general con- 

 tour is almost circular, antero-lateral angles being formed by four 

 flattened acute spines pointing outwards beyond the general out- 

 line of the Carapace. These spinose projections are somewhat 

 similar to the foliaceous expansions of R. palmacea from which 

 they differ in pointing outwards instead of forwards. The med- 

 ian portion of the Carapace is formed by a round carina which is 

 separated off by moderately deep grooves from the lateral por- 



