270 ANTILLEAN OBELISCUS. 



ular. The spire tapers very regularly to the obtuse summit,. 

 which is usually amputated and plugged in adult shells. 

 Whorls remaining about 8 or 9 (according to Pfeiffer 11 in 

 perfect shells), the earliest ones somewhat -convex, the rest 

 almost flat. The aperture is rhombic, rather oblique, lilac- 

 tinted within; outer lip acute; columella vertical, straight- 

 ened, but varying from slightly concave to a little convex in 

 the middle. A thin film covers the parietal wall. 



Length 45, diam. 11, aperture 11 mm. ; truncate, whorls Sy^. 



Length 41, diam. 11, aperture 12 mm. ; truncate, whorls 9. 



Length 48.3, diam. 13, aperture 13.2 mm. ; truncate, whorls 



Santo Domingo: Tablaso near San Cristobal (A. Salle, 

 large typical form), and Maniel (small form). Dondon, in 

 northern Haiti (Rolle). 



Bulimus salleanus REEVE, Conch. Icon., v, pi. 88, f. 657 

 (Feb., 1850). PFR., Monogr., iii, p. 397. Obeliscus salleanus 

 Eve., CROSSE, Journ. de Conch., 1891, p. 149. 



Reeve's figures (fig. 1) are 41-42 mm. long and apparently 

 perfect at the apex. Those from Salle before me (fig. 3) are 

 a little larger, but have lost the tips. The largest I have 

 seen were taken in Santo Domingo by Gabb (fig. 2), but he 

 did not note the exact place. The species is remarkable for 

 its spiral sculpture, as well as for the unusual size and solid- 

 ity. The subgeneric position of the form is uncertain. It is 

 not nearly related to the other Obelisks of the Antilles. 



27a. Var. DISPARILIS Pilsbry, nov. PL 40, fig. 4. 



Shell very much smaller and thinner, with 10% to 11 

 whorls, the 'apex generally perfect ; early whorls usually more 

 attenuate than in 0. salleana. Yellowish, the cuticle when 

 unworn very shortly pilose in spiral lines. 



Length 30, diam. 6.4, aperture 7.3 mm. 



Length 28, diam. 6.4, aperture 7 mm. 



Santo Domingo City (H. Prime, type lac.), and other local- 

 ities in S. Domingo. 



0. salleanus var. &,, minor CROSSE, Journ. de Conch., 1891, 

 p. 81, no description. 



