CUBAN ANNULARirOAE — TORRE AND BART&CH 315 



KEY TO THE SPECIES OF THE SUBGENUS DIPLOPOMA 



Axial ribs fused in groups to form broad hollow tufts at the summit. 

 Outer peristome broad. 



Peristome adnate torrei 



Peristome solute ramsdeni 



Outer peristome narrow architectonica 



Axial ribs not fused in groups to form broad hollow tufts at the 

 summit. 



Axial sculpture well developed. 



Spiral sculpture obsolete on spire pilsbryi 



Spiral sculpture not obsolete on spire songoensis 



Axial sculpture obsolete obsoleta 



ANNULARIA (DIPLOPOMA) TORREI (Ramsden) 



Plate 35, Figure 1 



1915. Diplopoma torrei Ramsden, Nautilus, vol. 28, pp. 34-35. 

 1920. Diplopojna torrei Henderson and Bartsch, Proc. U. S. Nat. Mus., vol. 

 58, p. 80. 



Shell elongate-conic, flesh colored, straw colored, or pale brown, 

 marked by interrupted spiral bands of brown. Nuclear whorls 2, 

 well rounded, microscopically graniilose, the last portion of the last 

 turn showing the beginning of the postnuclear sculpture. Postnuclear 

 whorls well rounded, marked by almost vertical or slightly retractively 

 curved axial riblets, which are frequently hollow. These riblets are 

 gathered into tufts at the summit, 2 to 8 forming a tuft, the tufts 

 being rather irregular in width and spacing; of these axial ribs, 48 

 occur on the first, 58 on the second, 82 on the third, 124 on the fourth, 

 and 204 on the last in the specimen described and figured. The 

 spiral sculpture consists of rather strong threads, which render the 

 axial riblets slightly nodulose at their junction. Of these threads, 

 5 occur on the second, 6 on the third, and 9 on the remaining turns 

 between summit and suture.f Suture moderately constricted. Periph- 

 ery well rounded. Base short, well rounded, narrowly, openly 

 umbilicated, marked by the continuation of the axial ribs and by 5 

 strong spiral threads, which render the axial ribs conspicuously nodu- 

 lose. The axial ribs extend feebly upon the umbilical wall where 1 1 

 additional spiral threads are visible, which also render the axial ribs 

 nodulose at their junction. The last whorl has the outer peristome 

 adnate to the preceding turn. Aperture broadly oval; peristome 

 double, the inner slightly exserted; the outer broadly expanded, 

 fluted, forming a conspicuous auricle at the posterior angle and marked 

 by concentric laminae. Operculum typically diplopomid. 



The specimen described and figured, U.S.N.M, No. 356501, is a 

 cotype received from Dr. Torre and it was collected by Dr. Ramsden 

 at Ojo de Agua, near Filipinas, Guantdnamo, Oriente Province. It 



