OUBAIsr ANNULARIID^AE TO'RRlE AND BARTSCH 243 



ADAMSIELLA (CUBADAMSIELLA) PROCAX (Poey) 



Plate 21, Figure 6 



1851. Cyclostoma procax Poey, Memorias sobre la historia natural de la isla de 



Cuba, vol. 1, pp. 104, 106, pi. 7, figs. 12-14. 

 1854. Ci'stvla? procax Pfeiffer, Malakozool. Blatter, vol. 1, p. 95. 



Shell small, elongate-conic, of wax yellow ground color with inter- 

 rupted spiral bands of brown, which are arranged in both axial and 

 spiral series. Nuclear whorls almost 2, forming a somewhat mam- 

 millated blunt apex, with the whorls inflated, strongly rounded, and 

 microscopically granulose. Postnuclear whorls very inflated and 

 strongly rounded, the first one marked by about 60 threadlike, retrac- 

 tively curved axial riblets. These riblets become decidedly dimin- 

 ished on the next whorl, which has only about 40. From this point 

 they increase in number on each turn to the last whorl, which shows 

 more than 60. Beginning with the second whorl and continuing 

 through the last turn, the riblets become sublamellar, and are 

 rendered sinuous and slightly vertebrated by the poorly developed 

 spiral threads, which are almost obsolete. These riblets extend prom- 

 inently to the summit, but they scarcely show indications of becoming 

 enlarged at the summit. Suture very strongly constricted. Peri- 

 phery inflated, strongly rounded. Base short, inflated, strongly 

 rounded, very openly umbilicated, marked by the continuations of the 

 axial riblets and by a faint suggestion of spiral threads. The axial 

 riblets extend into the open umbilicus, but here there is no indication 

 of spiral sculpture. The last whorl is solute for about one-fourth of a 

 turn. Aperture very broadly oval, almost circular, not evenly curved, 

 the outer lip being much more strongly arched than the inner; per- 

 istome double, the outer thin, narrow, flaringly expanded and slightly 

 auriculate at the posterior angle, a little wider on the outer lip than on 

 the parietal wall; the inner peristome is slightly exserted and reflected, 

 very distinct from the outer, the inner peristome showing the external 

 color bands. Operculum thin, corneous, with subcentral nucleus and 

 with a thin lamella rising on the inner edge of the turns, which is 

 slightly outward bent. The rest of the operculum is covered by fine 

 granules. 



The specimen figured, one of nine, U.S.N.M. No. 535336, has 9.2 

 whorls and measures: Length, 9.8 mm.; greater diameter, 4.3 mm.; 

 lesser diameter, 3.2 mm. 



This species, for which Poey did not cite a locality, was lost for some 

 time. It has recently been rediscovered by Hermano Le6n at Lomas 

 de Buenos Aires, between Cienfuegos and Trinidad. 



223580—40 8 



