MACROCERAMUS, HAITI. 129 



the shell, except on the smooth protoconch. Whorls somewhat 

 convex, the last well rounded. Aperture nearly round, some- 

 what oblique, the outer lip a trifle expanded, columellar lip 

 dilated. 



Length 16, diam. 7.5, apert. 4.5 mm. ; whorls 11%. 



Length 18, diam. 6.6, apert. 4.8 mm.; whorls 10 (truncate). 



Santo Domingo (Gabb, Salle). 



This form differs from M. tenuiplicatus chiefly in being 

 much more coarsely plicate-striate, and in its more robust 

 shape. It is much more coarsely striate than M. lineatus or 

 gabbi, and differs notably from both in the color-pattern, 

 which is constant, in the main, in 11 specimens from three 

 sources before me. Those from Gabb (fig. 54) have fewer 

 longitudinal dark lines and are larger than the shells received 

 from Salle, in the Robert Swift collection (figs. 52, 53). I 

 believe that this species is what Weinland mistook for lineatus 

 when he described var. glabrata; and the locality Azua, Santo 

 Domingo, quoted by Crosse for M. lineata, probably pertains 

 to this form. 



Group of M. klatteanus. 

 10. M. CYRTOPLEURUS (Pfeiffer). PL 24, figs. 77, 78. 



" Shell subperf orate, oblong- turrite, rather solid; strongly 

 ribbed, the ribs curved; somewhat glossy; white, painted with 

 round, brownish-corneous spots in somewhat oblique rows. 

 Spire with somewhat convex lateral outlines, turrite, the apex 

 acute, pale corneous; suture simple. Whorls 12, moderately 

 convex, the last a little narrower, slightly exceeding one- fourth 

 the whole length, having a thread-like keel and ornamented 

 with a narrow, corneous basal band. Columella very slightly 

 folded. Aperture somewhat oblique, lunate-subcircular ; peris- 

 tome thin, with somewhat converging margins, the right 

 margin very much arched, only a trifle expanded, the colu- 

 mellar margin dilated. Length 15, diam. 4.75 mm. ; oblique 

 length of aperture 4, width 3.5 mm." (Pfr.) 



Santo Domingo: Barrero (A. Salle). Type from Cuming 

 collection. 



Bulimus cyrtopleurus PFR., Conchyl. Cab., p. 126, no. 165, 



