No. 2369. NEW MOLLVSKS FROM CUBA— TORRE AND HENDERSON. 263 



Type.— Cat. No. 314961, U.S.N.M., was collected by Torre at El 

 Palenque tie Taguayabon, near llemedios. It measures: Length, 13.1 

 mm.; greater diameter. 8 mm.; lesser diameter, 6 mm.; length of 

 aperture within, 4 mm.; width of aperture within, 3.5 mm. Another 

 specimen, a male, measures: Length, 10.5 mm.; greater diameter, 6.4 

 mm.; lesser diameter, 5 mm. 



This subspecies was also found at the Cuevo del Muerto in the 

 Sierra de Meneses, District of Yaguajay, by Torre; also from the Ca- 

 verna Las Damas by the bank of the river Zazoe, near Guayos, by 

 Goodrich. These localities are all in the Province of Santa Clara, 

 Cuba, 



OPISTHOSIPHON (OPISTHOSIPHON) OBTECTUM TENUICOSTUM, new subspecies. 



Plate 42, figs. 4, 5. 



This differs from the typical subspecies in its somewhat more 

 inflated form, by the more narrowly expanded peris tone and its 

 more flattened axial threads. In this subspecies evidences of spiral 

 sculptural elements, except those within the umbilicus, are almost 

 wholly obsolete. 



Type.— Cat. No. 314962, U.S.N.M., was collected by Torre at Ceiro 

 de La Puntilla, near Remedios, Province of Santa Clara, Cuba. It 

 measures: Length, 11 mm.; greater diameter, 7 mm.; lesser diameter, 

 6.1 mm.; length of aperture within 3.9 mm.; width of aperture within, 

 3.4 mm. A male specimen measures: Length, 9 mm.; greater diam- 

 eter, 6.25 mm.; lesser diameter, 5 mm. 



OPISTHOSIPHON (OPISTHOSIPHON) LAMELLICOSTATUM, new species. 



Plate 42, figs 6, 7. 



The shell is elongate-conic, the apex decollated, having three and 

 a half to four convex whorls, the last nonsolute ; the umbilicus closed 

 by expansion of the peristome; the sutures well impressed. The 

 color is yellowish straw, slightty darker on the first postnuclear 

 whorl; no color bands or spots present. The sculpture consists of 

 widely spaced, regularly disposed, lamellar riblets. somewhat more 

 widely spaced on the' early postnuclear whorls. At the summit ol 

 the whorls these riblets are expanded into hollow, white, bladelike 

 tubercles which rather regularly crenulate the suture. Between 

 these axial riblets and parallel with them is a series of exceedingly 

 minute crinkly lirations, visible only through a lens; the spiral 

 sculpture is obsolete, being merely indicated by V>lad(diko projections 

 on the axial riblets, more apparent upon the earlier whorls. On the 

 umbilical wall are a number of obsolete axial cords also indicated by 

 a series of flat tubercles upon the axial riblets. The aperture is ovate, 

 obsoletely angled above; the peristome is double, the inner peritreme 

 slightly projecting; the outer peritreme is broadly expanded, about 



