188 PROCEEDINGS OF THE NATIONAL, MUSEUM Vol.89 



grayish dots. Sole of the foot a Httle paler than the sides, deeply 

 medially cleft. The motion may be direct or jerky. The animal 

 suspends by a mucous thread when at rest. 



OPISTHOSIPHON (BERMUDEZSIPHONA) SUBOBTECTUM GUAJABANENSE. new 



subspecies 



Plate 14. Figure 13 



A large series of specimens of this subspecies were taken by Bartsch 

 on Cerro de Guajabana, near Caibarien. It is most nearly related to 

 0. (B.) subohtedum quintanense, but it is readily distinguished from 

 that by its darker color, interrupted spiral bands, and stronger sculp- 

 ture. There are 46 axial ribs on the first of the remaining whorls and 

 61 on the last turn. 



The type, U.S.N.M. No. 535459, has 3.5 whorls remaining and 

 measures: Length, 12.5 mm.; greater diameter, 7.9 mm.: lesser 

 diameter, 6.0 mm. 



Animals of this subspecies, collected by Bartsch at Guajabana 

 August 8, 1928, were described by him as having the dorsal parts 

 sooty, a little paler about the base of the tentacles and eyes. Entire 

 body, except the sole of the foot, covered by numerous flattened 

 papillae, which are made up of many whitish dots. Tentacles sooty 

 with a dusky orange ring about the base. Sole of the foot deeply, 

 medially cleft, smoke gray, with an olivaceous tinge. The animal 

 when at rest suspends by a mucous thread. In this subspecies the 

 male is smaller than the female. 



OPISTHOSIPHON (BERMUDEZSIPHONA) SUBOBTECTUM QUINTANENSE, new 



subspecies 



Plate 14, Figure 14 



This race was collected by Bartsch at Loma de Quintana, a lime- 

 stone block about 4 miles slightly southwest of Caibarien, and an 

 equal distance a little east and north of Remedios. This is one of the 

 elongate-ovate members. The shell is pale and the ribs are very 

 poorly developed. In size it approaches 0. (B.) subohtedum guaja- 

 banense, but it is easily distinguished from guajabanense by its pale 

 color and feeble sculpture. There are 34 axial ribs on the first of the 

 remaining turns and 68 are on the last whorl. 



The type, U.S.N.M. No. 535460, has 3.4 whorls remaining and 

 measures: Length, 11.8 mm.; greater diameter, 7.3 mm.; lesser 

 diameter, 5.9 mm. 



Animals of this subspecies were collected by Bartsch at Loma de 

 Quintana on August 9, 1928, and were described by him as having the 

 upper part of smoke-gray color, paler on the forehead, with a pinldsh 

 area above the base of the tentacles, which are pale orange tipped with 



