CUBAN ANNULAEIIDAE — TORRE AND BARTSCH 213 



aperture. Operculum typically opisthosiphonid. Siphon at the 

 posterior angle of the aperture directed backward into the sutui-e. 

 The type, U.S.N.M. No. 314951, was collected by Torre and 

 Henderson at Paso de Lesca, Sierra de Cubitas, Camaguey Province. 

 It has a little over 3 whorls and measures: Length, 12.2 mm.; greater 

 diameter, 8.7 mm.; lesser diameter, 6.4 mm. 



OPISTHOSIPHON (CUBITASIPHONA) DEVIATUM. new species 



Plate 17, Figure 7 



Shell elongate-ovate, orange-brown with a broad band of brown at 

 the periphery; peristome yellowish white. Nuclear whorls decollated. 

 Postnuclear whorls inflated, well rounded, marked by slightly retrac- 

 tively slanting axial riblets, which are a little more distantly spaced on 

 the early turns than on the later; on the last whorl they are about as 

 wide as the spaces that separate them. Of these riblets, 86 occur 

 upon the first of the remaining turns, 146 upon the second, and 170 

 upon the last. Some of these riblets fuse at the summit to form 

 minute white cusps. These riblets are of rather irregular development 

 and spacing, and they are best shown on the last turn. Suture 

 strongly constricted. Periphery inflated, well rounded. Base short, 

 openly umbilicated, inflated, well rounded, marked by the continua- 

 tion of the axial ribs, and within the umbilicus by 14 spiral threads. 

 Last whorl solute for about one-fourth of a turn. Apertm'e broadly 

 oval ; peristome double, the inner moderately exserted ; the outer only 

 slightly expanded on the outer lip and but little more so on the inner, 

 forming a conspicuous auricle at the posterior angle. Operculum ? 

 Siphon at the posterior angle directed into the suture. 



The type, U.S.N.M. No. 355487, was collected by Torre at Cantera 

 de Montejo, Arroyo Hondo, 3 leagues east of Camaguey. It has 3.5 

 whorls and measures: Length, 11.2 mm.; greater diameter, 8.2 mm.; 

 lesser diameter, 6.4 mm. 



OPISTHOSIPHON (CUBITASIPHONA) PAREDONENSE Torre and Henderson 



Shell elongate-ovate, varying in color from flesh color through 

 orange to pale or dark brown or even purplish brown, unicolor, or with 

 a broad peripheral spiral zone of brown. Nuclear whorls 2, small, 

 well rounded, microscopically granulose, showing the beginning of the 

 postnuclear sculpture on the last portion of the last turn. Postnuclear 

 whorls inflated, strongly rounded, marked by slightly retractively 

 slanting axial riblets, which vary in strength and spacing in the 

 different subspecies. Some of these riblets fuse at the summit to form 

 cusps which are variable in strength but which are usually constant 

 in the different subspecies. Suture strongly constricted. Base 



