NO. 1110. PROCEEDINGS OF THE NATIONAL MUSEUM. 305 



tlie West Indies, while the corals, which are described by the late P. M. 

 Duncan, are remarkably different from those of the existing fauna. 



In the present paper those species followed by the name of Mr. 

 Guppy were described by him, the others by the writer. Mr, Guppy 

 notes that the new species from the Trinidad rocks, herein described, 

 have for the most part been detected since 1890, during his reexplora- 

 tion of the microzoic rocks of the' island. The strata are briefly 

 described in his paper on the "Tertiary microzoic formations of 

 Trinidad," read before the Geological Society of London in June, 1892, 

 and published in the issue of the Journal of the society for Novem- 

 ber, 1892. 



Wm. H. Dall. 



DESCRIPTION OF THE SPECIES. 

 RINGICULA, doubtful species, junior. 



Oblong-ovate, turrited; whorls 5, s^jirally ribbed by rounded costse 

 with narrow (linear) interstices; aperture suboval; columella with two 

 strongly twisted folds; spire conic; apex smooth, blunt. Length 3 

 mm., breadth 2 mm. [G.] 



Ditrupa bed, Pointapier, Trinidad, Guppy (2270). No. 107108, 

 U.S.N.M. Shells all incomplete and too young to name or discriminate, 

 but useful as establishing the presence of this genus in the beds, 



TORNATINA BULLATA, Kiener. 



T. canalicidata, Okhigny, Moll. Cuba, I, p. 133, pi. iv bis, tigs. 21-24, 1853; not 

 of Say. 



Oligocene of Jamaica (Guppy, 2267). No. 107110, U.S.N.M. 



PLEUROTOMA VENUSTA, Sowerby. 



P. rcnusta, Sowerby, Jouru. Geol. Soc. Loud., VI, p. 50, pL x, fig. 7, 1849. 



P. jamaiceiise, Guppy, Journ. Geol. Soc. Lond., XXII, p. 290, pi. xvi, fig. 6, 1866, 



Oligocene of Jamaica and Haiti; Ditrupa bed, Pointapier, Trinidad, 

 Guppy (2118, 2255). No. 107140, U.S.N.M. Very young specimens of 

 several other species were obtained from this locality, but they were 

 not suflficiently matured for description. 



CLATHURELLA AMICTA, Guppy, new species. 

 (Plate XXVII, fig. 12.) 



Fusiform-ovate with longitudinal ribs crossed by revolving (spiral) 

 ridges which rise upon them ; whorls about 7, strongly keeled in the 

 middle by one of the most prominent of the revolving ridges, some- 

 times the uppermost one, but in other examples the third or fourth; 

 aperture elongate-oval; jieristome broadly expanded and reflected; 

 sinus in-oduced. Alt., 4.6 mm. [G.] 



Oligocene of Jamaica, Vendryes (Guppy, 2273). No. 107142, U.S.N.M. 



Proc. N, M. vol. xix 20 



