No. 2369. NEW MOLLUSKS FROM CUBA— TORRE AND HENDERSON. 259 



riblets expand into hollow white bulbs at the suture above, impart- 

 ing to it an irregualr crenulate appearance. Spiral sculpture is 

 confined to the umbilical wall and consists of a scries of low cords 

 which are, in perfect specimens, concealed by the expanded peristome 

 covering the umbilicus. The aperture is vertical, oblong-ovate and 

 obtusely angled above; the peristome is doubled, the inner peritreme 

 of which is decidedly projecting; the outer peritreme is broadly ex- 

 panded and bent forward on the outer or right side of the aperture; 

 it is less broadly expanded but somewhat fluted at the lower portion 

 of the aperture; on the inner or left side of the aperture it is suddenly 

 recurved back, forming a notch and completely covering the umbili- 

 cus except for a slight chink behind the notch; it also covers and is 

 adnate to the whorl above; above the posterior angle the outer 

 peritreme is strongly expanded into a projection affixed to the whorl 

 above on its inner and flaring out on its outer side; the face of this 

 projection is roughly, concentrically ribbed. Back of this projection 

 is a small siphon which deflects backwards and downwards into 

 the narrow space between the solute portion of the last whorl and 

 communicating with the axis of the shell. Communication with the 

 interior of the shell is through a small pore near the anterior angle of 

 the aperture. The operculum is typical of the genus. 



Type. — A female specimen, Cat. No. 314957, U.S.N.M., from Loma 

 de Borje, measures: Length, 13.8 mm.; greater diameter, 7.8 mm.; 

 lesser diameter, 6.75 mm.; length of aperture within, 4.6 mm.; width 

 of aperture within, 3.5 mm. The smallest specimen observed in a 

 large series has a length of 10.75 mm. 



The type lot is from the Loma de Borje, an isolated hill near the 

 eastern end of the Cubitas range, on the right side of the river Maxi- 

 mus, and was collected by Miss Barbara Hubbard. Other lots are 

 from " Santa Cruz" between "Las Minas" and "Los Cangilones" and 

 in " Yaguajay," all localities in a series of isolated hills near "Borje," 

 in the municipality of Nuevitas, Province of Camaguey, Cuba; col- 

 lected by Torre. 



Specimens from "Borje" are usually somewhat larger than those 

 from other localities. 



OPISTHOSIPHON (OPISTHOSIPHON) PROTRACTUM, new species. 



Plate 41, figs. 5 and 11. 



The shell is oblong-ovate, spire decollated, leaving three and a 

 half whorls moderately convex, the last whorl shortly solute, the 

 umbilicus completely closed by an expansion of the peristome. The 

 suture is deeply impressed and crenulated. The color is chestnut, 

 rather shining and with a series of indistinct interrupted color- 

 bands of a darker chestnut. There are seven of these narrow bands 

 on the body whorl of the type specimen. The sculpture consists of 



