CUBAN ANNUIiARIIDAE TORRE AND BARTSiCH 209 



double, the inner exserted and slightly reflected; the outer narrow on 

 the outer and basal lip, expanded into a conspicuous auricle at the 

 posterior angle and on the inner lip posterior to the middle, spreading 

 out as a broad flap, which touches the preceding whorl on the parietal 

 wall and which partly hides the umbilicus. Opercidum typically 

 opisthosiphonid. Siphon at the posterior angle of the aperture 

 behind the peristome directed into the suture. 



The type, U.S.N. M. No. 535477, was collected by Doctors Palmer 

 and Bermudez at Cayo Cruz, north of Camagiiey, Camagiiey Provmce. 

 It has 3.5 whorls remaining and measures: Length, 9.2 mm.; greater 

 diameter, 7.3 mm.; lesser diameter, 5.4 mm. 



OPISTHOSIPHON (CUBITASIPHONA) BERRYI Clapp 



Shell elongate-ovate, varying in ground color from flesh color to 

 orange, pale brown and dark brown, usually with a broad subperiph- 

 eral band which, however, may be wanting. The peristome is flesh 

 colored or pale yellow; the interior varies in intensity of coloration 

 with the exterior. Nuclear whorls 2, small, weU rounded, microscopi- 

 cally granulose, with the last portion of the last turn showing the 

 beginning of the postnuclear sculpture. Postnuclear whorls inflated, 

 strongly rounded, marked by almost vertical or slightly retractively 

 slanting, very closely spaced axial riblets, which vary in strength in 

 the different subspecies. On the early whorls these riblets are 

 distantly spaced, but they become more closely approximated as the 

 shell increases in size, and on the last whorl they are usuaUy about as 

 wide as, or almost as wide as, the spaces that separate them. Some 

 of these riblets become expanded and fused at the summit to form 

 slender cusps, which extend into the suture. These cusps vary 

 considerably in strength in the different subspecies. Base inflated, 

 strongly rounded. Umbilicus varying from almost closed by the 

 reflected outer peristome to entirely open, depending upon the sub- 

 species, marked by the continuation of the axial riblets and by spiral 

 threads. The latter are confined to the umbUical region. Aperture 

 broadly oval; peristome double, the inner moderately exserted and 

 slightly reflected; the outer strongly expanded, always more so on 

 the inner lip than on the outer, that of the inner lip notched either 

 narrowly or broadly, the part posterior to the notch being reflected 

 over the umbilicus. A conspicuous auricle is always present at the 

 posterior angle of the aperture. The outer peristome shows concen- 

 tric laminations. Operculum typically opisthosiphonid. Siphon at 

 the posterior angle of the aperture, directed backward into the suture. 



This species is restricted to the Cubitas Alountain region of 

 Camagiiey Province, where it breaks up into a number of geographic 

 races, which we shall designate as subspecies, and which the following 

 key and descriptions will help in recognition: 



