154 UROCOPTIS OF HAITI. 



cessory lamella in both species is quite short, and so com- 

 pletely united with the base of the axis that it appears only 

 as a dilation of the latter. 



There are more or less distinct traces of punctures and stri- 

 ation on the last whorl, in U. flammulata, and the suture 

 usually shows a faint and spaced crenation above. 



29. U. MENKEANA (Pfeiffer). PL 38, figs. 12, 13, 14, 15. 



Shell oblong, rather obese, thin, the upper third or fourth 

 tapering rapidly to a narrow concave truncation, closed by a 

 tongue-shaped plug, often concealed. Surface glossy, white, 

 variegated with corneous-brown streaks ; under the lens seen 

 to be closely and finely striated. Whorls 7y 2 to 10, slightly 

 convex, the suture regularly and closely crenate on the cone, 

 obsoletely so on the later whorls. Last whorl a trifle free in 

 front, having a cord-like keel below. Aperture large, white 

 inside, rounded ; peristome expanded and reflexed, continuous 

 and free, or shortly adherent. Axis nearly straight, a little 

 twisted, especially above, having a slight prominence in the 

 middle in the last whorl. 



Length 32, diam. 11.5 mm. 



Length 31, diam. 12 mm. (Pfeiffer 's type). 



Length 30, diam. 10.5 mm. 



Haiti: Neyba, in the Republic of S. Domingo (Salle). 



Cyl. menkeana PFR., P. Z. S., 1852, p. 140, pi. 13, f. 7; 

 Monogr., iii, p. 564; Conchyl. Cab., p. 4, pi. 1, f. 7, 8. CROSSE, 

 Journ. de Conch., 1891, p. 139. 



Larger, thinner and more obese than any of the related 

 forms, the diameter more than one- third the length. The 

 "accessory lamella" is completely united with the columella, 

 forming merely a slight prominence thereon. Pfeiffer states 

 that a perfect specimen has 14 whorls (pi. 38, figs. 14, 15). 

 It is usually decollate, as in fig. 13. The peristome may be 

 either adherent above (as in fig. 12) or very shortly free. 



30. U. TRUNCATA (Dillwyn) . PL 39, figs. 27, 28. 



Shell subrimate, truncate, cylindrical, thin (becoming thick 

 and solid with age), whitish, striatulate, glossy; suture ere- 



