VAEICELLA, HAITI. 119 



Haiti : Mt. Platon, 30 miles northeast from Aux Cayes 

 (Smith). 



Achaiina histrio PFE., Malak. Bl. xiii, 1866, p. 85; Novit. 

 Conch, ii, p. 300, pi. 72, figs. 17, 18. Glandina histrio Pfr., 

 CROSSE, Journ. de Conehyl. 1891, p. 97. 



This rare form is known only by the original specimen. 

 It seems related to the V. denticulata group in form, yet 

 differs strikingly in 'coloration. 



67. V. IMPRESSA (Pfeiffer). PL 18, fig. 28. 



Shell oblong-turrite, thin, smooth, irregularly marked with 

 impressed longitudinal lines, fulvous. Spire turrite, the apex 

 rather acute; suture impressed, submarginate. Whorls 6 l /2, 

 flat, the last about two-fifths the total length. Columella arcu- 

 ate, abruptly truncate at the base. Aperture oblique, sinu- 

 ate-oval ; peristome simple, the right margin receding at 

 the base. Length 8.5, diam. 2.66, aperture 3 x 1.5 mm. 

 (Pfr.). 



Haiti: around Santo Domingo City (Salle). Also Porto 

 Rico, St. Johns and St. Thomas. 



Achatina impressa PFR., P. Z. S. 1851, p. 148; Conchyl. 

 Caib. p. 354, pi. 29, f. 16, 17; Monogr. iii, 491.Snl>ulina im- 

 pressa Pfr., CROSSE, Journ. de Conchyl. 1891, p. 151. 



The original description and figures are given. In Mono- 

 graphia vi, p. 231, Pfeiffer adds the locality St. Johns, 'col- 

 lected by Riise. From a study of the specimens before me 

 from Haiti, Porto Rico and St. Thomas I am disposed to unite 

 G. terebrcrformis Shuttl. as a synonym or variety, though I 

 have not seen type or topotypes of V. impressa. The some- 

 what greater size and colored streaks of Shuttleworth 's form 

 seem to 'be its only distinguishing characters 1 , and we have no 

 evidence that Pfeiffer's type of V. impressa was a fully adult 

 shell. 



Var. terebrccformis (Shuttleworth). PI. 19, fig. 33. 



Shell turrite-subulate, thin, very smooth, irregularly marked 

 with remote impressed lines, very glossy, rufous corneous, 

 here and there ornamented with darker or reddish streaks. 



