14° 



Bulletin 35 



288 



PAPER No. 18. 



ON SOME FOSSIL SHELLS FROM COMPARO ROAD, 



TRINIDAD. 



Published in the July No. (1908) of the Bull. Misc. Inform., 

 Botanical Dept. Trinidad, pp. 114-115. 



Page 114 



Among the fossils submitted to me for determination at dif- 

 ferent times by Mr. Cunningham-Craig, lately Government Geol- 

 ogist, was one collection of peculiar interest consisting of fresh 

 water shells of Genera and species not now found in Trinidad 

 and forming a fauna completely distinct from any now existing 

 here. The locality given me was Comparo Road. I furnished 

 Mr. Craig with the names of the shells and notes on them ; but 

 as I have already waited some considerable time and it may be 

 long yet before any general paper by him appears I think it as 

 well to put on record the names of these fossils. 



1. Hemisinus sulcatus, Conr. 

 Amer. Journ. Conch. 1870. 



Conrad assigns H. tenellus as a near ally of this shell. It is 

 however very closely akin to H. bicinctus Reeve an existing spe- 

 cies of South American Rivers. Melania cingulata Moricand 

 (Journal de Conch, i860, PI. xii F. 6) and M. (Melanopsis) bra- 

 siliensis Mor. (Ibid. PI. xii, F. 7.) are also very near. 



2. Leptoxis c7'enocarina , Myricand. 



An inhabitant of Brazilian rivers. A remarkable and aber- 

 rant form of Melania. 



3. An 0 don bate sit, Woodward. 



Ann. and Mag. M. H. 1871-4 Ser. Vol. vii. P. 103 PI. v. F. 10. 



There is no need to go to Asia for the nearest Analogue of 

 this Bivalve, which is related to the Anodon Leotaudi of our 

 Rivers and equally so to A. sirionos Orb. and A. puelchana Orb. 



