1866.] GUPPY JAMAICAN MOLLrSCA. 289 



above with a series of longitudinally elongate tubercles, and some- 

 what ribbed near the aperture; the last whorl spirally grooved 

 anteriorly ; spire small, elevated, acuminate ; outer lip thickened, 

 toothed internally ; columellar callus with a prominent edge. 



This shell is distinguished from the preceding, which it somewhat 

 resembles, by the middle part of the whorls being smooth, by the 

 shorter spire, and the somewhat steplike overlapping of the whorls. 

 Both these species, as well as C. venusta from the San Domingan 

 Miocene, seem to have relations with PUurotoma. They belong to 

 the subgenus Stromhina of Morch. 



23. Cancellaeia Bakretti, spec. nov. PI. XYII. fig. 11. 



Shell stout, ovate-turreted, cancellated by numerous equidistant 

 and close longitudinal and transverse ribs, of which the trans- 

 verse are somewhat more distinct than the longitudinal ; whorls 8, 

 somewhat compressed, very slightly angulated near the suture ; 

 aperture ovate, rather narrow : columella strongly folded ; outer lip 

 blunt, very slightly sinuate anteriorly, deeply grooved within. 



The specimens seem to be scarcely adult, and the species may, 

 when full grown, have a columellar callus like that in the next 

 species. 



24. Cancellaria l^evescens, spec. nov. PI. XYII. fig. 12. 



SheU. very thick, ovate, spire cancellated by numerous ribs, of 

 which the longitudinal are the more distant and more prominent ; 

 whorls 8; last one forming about two-thirds of the height of the 

 shell, nearly smooth, but with fine lines of growth decussated by low 

 distant ridges, the latter becoming quite obsolete near the aperture, 

 except anteriorly, where they are more distinct ; aperture widest 

 anteriorly; columella strongly folded with two verj^ prominent 

 plaits ; callus thick, spreading ; outer lip blunt, obsoletely dentate, 

 grooved internally ; canal short, tortuous. 



This species, allied to C. reticulata, Dillw., was at first considered 

 as a variety of that species, an opinion afterwards abandoned. The 

 characters given will readily distinguish it from that recent species. 

 It partakes in some measure of the characters of G. ohesa and C. solida, 

 Sow. 



25. Cancellaeia Moorei, spec. nov. PL XYII. fig. 7. 



Shell ovate, ventricose, subrimate, longitudinally striated and orna- 

 mented with stout, rounded, distant, variciform costse, which are 

 crossed by spiral ribs ; whorls about 7, increasing rapidly ; aperture 

 rounded ovate; columellar caUus thin, with prominent edges; 

 columella twisted, with three plaits ; canal reflected. 



2Q. Pleurotoma con-sors. Sow. 



Quart. Journ. Geol. Soc. vol. vi. p. 50. 



27. Pleurotoma venustum. Sow. 



Quart. Journ. Geol. Soc. vol. vi. p. 50, pi. 10. f. 7. 



