•CUBAN ANNUUARIIDAE TORRE AND BARTSCH 267 



TUDORA (AGUAYOTUDORA) SUA VIS. new species 



Plate 26, Figure 5 



Shell elongate-ovate, varying from pale yellow to pale brown, some- 

 times with a brown band at the suture. Nuclear whorls 2, inflated, 

 strongly rounded, microscopically granulose. Postnuclear whorls 

 inflated, strongly rounded, marked by very closely spaced, low, 

 rounded axial riblets, which are separated by spaces about as wide as 

 the riblets. There are 431 of these on the last whorl. The riblets 

 do not form cusps at the smnmit. The spiral sculpture is absent on 

 the spire. Suture strongly constricted. Periphery of the last whorl 

 well rounded. Base short, well rounded, marked by the continuation 

 of the axial ribs and by 5 almost obsolete spiral cords, which grow 

 successively a little stronger from the periphery toward the umbilicus. 

 The umbilicus is broad and open and its wall bears 8 spiral cords, 

 which grow successively stronger from within toward the outside. 

 The axial riblets cross these spiral cords and their interspaces. Last 

 whorl solute for about one-fifth of a turn. Aperture broadly oval; 

 peristome simple, slightly auriculated at the posterior angle. Oper- 

 culum typically tudorid. 



The type, U.S.N.M. No. 493432, comes from Guaicanamar, Cama- 

 giiey Province. It has 6.5 whorls and measures: Length, 12.1 mm.; 

 greater diameter, 7.0 mm.; lesser diameter, 5.8 mm. 



This species is easily distinguished from all the other Aguayotudoras 

 by its fine ribbing. 



TUDORA (AGUAYOTUDORA) CRISTAT A, new species 



Shell thin, elongate-ovate, pale brown, with interrupted spiral bands 

 of chestnut brown. Nuclear whorls 2, inflated, well rounded, micro- 

 scopically granulose, forming a rather small apex. Postnuclear whorls 

 inflated, rather high between summit and suture, marked by retrac- 

 tively curved axial ribs, which form conspicuous scallops at the sum- 

 mit, where frequently several of them are fused together to form a 

 tuft. On the early turns the axial riblets become expanded also into 

 scallops at the periphery where they interlock with those at the smnmit 

 of the succeeding turns. The spiral sculpture is obsolete or very 

 poorly developed. Suture strongly constricted. Periphery of the 

 last whorl well rounded. Here the scallops mentioned for the early 

 turns are absent. Base short, well rounded, with a mere umbilical 

 chink, but without apparent perforation, marked by spiral cords, 

 which are low and broad anteriorly, and which become stronger 

 toward the umbilicus, where they render the axial ribs weakly scal- 

 loped. The exposed portion of the umbilical wall shows slender spiral 

 threads, which also form minute scallops at their junction with the 



