316 ANTILLEAN FOSSILS— (i UPPY JXD DA LL. vol. xix 



Oligocene of Jamaica, Veiulryes (duppy, 2259). No. 107118, U.S.N.M. 

 Allied to O. cinctus and O. hastatns, Adams. 



PYRAMIDELLA (LONGCH^US), doubtful species. 



Ditrupa bed, Pointapier, Tiinidad,(luppy (22(;()). Ko. 107119, U.S.KM. 

 These fragments are obviously the youngs of a larger species, perhaps 

 the preceding. They do not oiler satisfaetory characters for a specific 

 description. 



TURBONILLA PLASTICA, Guppy, new species. 

 (Plate XXVIII, fig. 4). 



Elongate turrited, longitudinally ribbed, the ribs narrower than 

 their spirally-striate interstices; whorls about 7, exclusive of the apex, 

 which is large, sinistral, smooth, and composed of about 3 turns set on 

 in a plane continuous with the axis of the shell and at ligiit angles to 

 the plane of the succeeding whorls; ai)erture simple, ovate; columella 

 reHected. Alt. 3.5, lat. 1 mnj. [G.J 



Ditrupa bed, Pointapier,Trinidad,CTuppy(2123). :t^o. 107113, U.S.N.M. 

 Distinguished by its larger nucleus irom T. tiirris, Orbigny, and the 

 following species: 



TURBONILLA TURRITISSIMA, Guppy, new species. 

 (Plato XXVIII, i\ii. 5.) 



Subulate-turrited, many-wliorled, longitudinally ribbed, the inter- 

 stices between the ribs cancellated by less-pronounced spiral lines. 

 Whorls {'1 lii) slightly rounded; aperture suboval, with a slightly 

 twisted columella. Length of a large imperfect example 8, breadth 

 2 mm. Length of a small perfect example 5, breadth 1.5 mm. A large 

 example has 10 whorls, l>ut the spire is broken. A smaller example 

 has 9 to 10 whorls. [G.) 



Oligocene of Jamaica, Veudryes (Guppy, 2258). No. 107114, U.S.N.M. 

 The following forms are as distinct as species usually recognized in 

 this grouj), but believing the range of variation to be much greater 

 than usually allowed for, I am inclined to think they ma}" eventually 

 prove varieties of the preceding species. [G.j 



TURBONILLA ANGULATA, Guppy, new species?. 

 (Plate XXVIII, fig. 10. ) 



A form with strongly angulate whorls giving a step-like ap]>earance. 

 In this the spiral striic between the longitudinal ribs are fine and 

 thread-like. Alt., 3.5 mm. 



Oligocene ofJamaica,Vendryes, (Guppy, 2258a). No. 107115,U.S.KM. 



