264 ANTILLEAN OBELISCUS. 



the striae stronger below the suture. The embryonic and early 

 whorls are decidedly larger than in 8. bacillus. The figured 

 specimens measure : 



Length 17, diam. 4.3 ? aperture 4.7 mm. ; whorls 8%. 



Length 18, diam. 4.2, aperture 4.4 mm.; whorls 9%. 



The largest of an abundant series taken near Sancti Spir- 

 itus, Prov. Santa Clara, measures: length 17.5, diam. 3.9, 

 apert. 4.5 mm., whorls 



Var. zaza nov. PI. 40, figure below fig. 4. 



On the rocky hill at Zaza del Medio, Prov. Santa Clara, I 

 found a slender form of the species. The very pale greenish- 

 yellow shell is composed of 9 to 9% whorls ; the spire is more 

 slender and tapers more regularly than in 0. komalogyra, 

 the lateral outlines being straight. In adult shells the later 

 whorls have a white-bordered suture. 



Length 18.5, diam. 3.9, aperture 4 mm. ; whorls 9y 2 . 



Length 18, diam, 4, aperture 4.3 mm. ; whorls 9. 



Length 17.3, diam. 3.7, aperture 4 mm.; whorls 9%. 



In 0. bacillus Pfr. the early whorls are more attenuate 

 than in these shells. 



22. 0. TEREBRASTEE (Lamarck) . PI. 30, figs. 5, 6, 11, 12. 



Shell cylindric-turrite, somewhat glabrous, corneous-brown- 

 ish; whorls 9, flattened, the last 'more ventricose; lip thin, 

 acute. Length 9 to 10 lines (Lam.). 



Porto Kico (Mauge, type loc.). San Juan, Ceiba, Huma- 

 cao and Luquillo (Blauner) ; Quebradillas, Vegabaja and 

 Las Marias (Gundlach) ; Lois'a (Swift). 



? Helix terebraster FERUSSAC, Prodrome, p. 55, no. 370, no 

 description. Bulimus terebraster Lam., An. s. Vert., vi, pt. 

 2, p. 124, no. 28 (April, 1822) ; Edit. Desh., viii, p. 234. 

 MENKE, Zeitschr. f. Malak., 1853, p. 63. PFR., Monogr., iii, 

 653. Stenogyra (Obeliscus) terebraster Fer., SHUTTL., Diag- 

 nosen n. Moll., no. 6, p. 140, in Mittheil. naturf. Ges. Bern, 

 1854, p. 48. Stenogyra t., MARTENS, Conch. Mittheil., i, p. 

 94, pi. 17, f. 9-11; Jahrb. d. Mai. Ges., iv, 1877, p. 349; 

 Nachrichtsblatt, xxiii, 1891, p. 132. CROSSE, Journ. de Con- 



