TRTTNCATELLIILE. 141 



distinct near the middle suture ; remaining whorls four to four 

 and a half, moderately convex, slowly increasing, the last gene- 

 rally smooth below the middle, with a short compressed basal 

 crest ; apertvu-e nearly perpendicular, oblique, subelliptical, 

 slightly effused at base ; peristome simple, continuous, some- 

 what expanded ; right margin surrounded with a slightly pro- 

 minent crest. Length 4^-5, breadth 1^-2 mill. 



Truncatella pulchella, Pfr. in Wiegm. Arch.f. Nat. 1839, i. p. 356 ; 

 Zeitschr. f. Malak. 1846, p. 186 ; Mon. Auric, p. 192. 

 Jay, C'atal. 1850, p. 252. n. 5773. 

 Shuttlew. Diagn. n. Moll. no. 7. p. 155. 

 Poey, Memor. i. p. 393 (excluding' the synonyms). 

 mist. 3Ion. p. 10. n. 6. t. 2. f. 11-15. 

 H. and A. Adams, Gen. rec. Moll. ii. p. 311. 



/3. More distinctly ribbed, with the peristome subduplicate. 

 Hah. Cuba, Jamaica, Portorico, St. Thomas. 



16. Trttncatella elongata. 



Shell subrimate, elongate, cylindrical, rather turrited, trun- 

 cate, moderately solid, whitish (?), sculptured with extremely 

 crowded, rectilinear, thread-like ribs ; suture simple ; remaining 

 whorls seven, moderately convex, slowly increasing, the last not 

 compressed in front ; aperture perpendicular, elliptical ; peri- 

 stome simple, continuous, imperceptibly expanded. Length 

 nearly 6, breadth \\ mill. 



Truncatella elongata, Poey, Memor. ii. 

 Pfr. Mon. Auric, p. 193. 



Hah. Eastern province of Cuba. 



17. Truncatella modesta. 



Shell much elongate, ovate-conic, yellowish horn-colour, 

 with a white upper margin of the whorls, with about twenty- 

 one prominent compressed ribs, aud numerous spiral striae, 

 which are interrupted by the ribs ; apex truncate, with the loss 

 of the upper whorls ; spire with the outlines somewhat curvi- 

 linear; whorls remaining after truncation seven, moderately 

 convex, margined above ; aperture subovate, slightly angulated 

 anteriorly. Length (after truncation) 0T75, breadth O'OO ; 

 length of aperture 0-045 inch (C. B. Adams). 



Truncatella modesta, C. B. Adams in Ann. Lye. New York, v. 

 p. 48 ; Contrib. to Conch, no. 8. p. 132. 

 Pfr. Mon. Auric, p. 193. 



Hab. Jamaica. 



