270 PROCEEDINGS OE THE NATIONAL, MUSEUM Vol.89 



TUDORA (AGUAYOTUDORA) BERMUDEZI BERMUDEZI. new subspecies 



Plate 26, Figure 8 



This subspecies comes from La Caridad, on the road southeast of 

 Camaguey, Camagiiey Province. It differs from T. {A.) hermudezi 

 sibanicuensis in being much larger and stouter. 



The type, U.S.N.M. No. 493441, has 5.3 whorls remaining and 

 measures: Length, 14.0 mm.; greater diameter, 7.3 mm.; lesser di- 

 ameter, 6.1 mm. 



TUDORA (AGUAYOTUDORA) BERMUDEZI SIBANICUENSIS. new subspecies 



Plate 26, Figure 9 



This subspecies was collected by Bermudez at Finca San Pablo 

 near Sibanicu, Camaguey Province. It differs from T. {A.) hermudezi 

 bermudezi in being much smaller and much more slender. 



The type, U.S.N.M. No. 493442, has 4.5 whorls remaining and 

 measures: Length, 10.7 mm.; greater diameter, 6.0 mm.; lesser di- 

 ameter, 5.0 mm. 



TUDORA (AGUAYOTUDORA) RECTA ([Gundlach] Pfeiffer) 



Shell ovate, varying in color from flesh colored to pale brown, 

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

 inflated, well rounded, microscopically granulose. Postnuclear whorls 

 inflated, strongly rounded, marked by axial ribs, which vary materially 

 in strength in the different races, not infrequently with a finer thread 

 between the stronger ribs. The summits of the stronger axial ribs 

 are expanded into hollow auricles and in the early whorls the axial 

 ribs are also expanded at the periphery, forming an interlocking ele- 

 ment in the suture with the auricles at the summit. In some of the 

 races the axial ribs are somewhat sinuous and slightly nodulose. 

 Suture well constricted. Periphery inflated, well rounded. Base 

 moderately, broadly, openly umbilicated, marked by the continuation 

 of the axial ribs. The umbilical waU bears spiral threads, which 

 render the axial ribs nodulose, particularly so near the outer limit of 

 the umbilicus. The last whorl is solute for a varying distance. Aper- 

 ture broadly oval, with more or less of a carina at the posterior angle; 

 peristome simple. Operculum typically tudorid. 



The species is restricted to Camaguey Province. We are recognizing 

 three subspecies, which the following key and descriptions wiU help 

 to differentiate: 



KEY TO THE SUBSPECIES OF TUDORA (AGUAYOTUDORA) RECTA 



Auricles at the summit closely spaced. 



Axial ribs closely spaced martiensis 



Axial ribs distantly spaced barreti 



Auricles at the summit not closely spaced recta 



