CUBAN ANNULARIIDAE — TORRE AND BARTSCH 379 



The type, U.S.N.M. No. 356288, was collected by Dr. Ramsden at 

 Embrita, Monte Toro, Oriente Province. It has 4.8 whorls and 

 measures: Length, 10.0 mm.; greater diameter, 10.8 mm.; lesser 

 diameter, 8.2 mm. 



ANNULAltlA (ANNULARELLA) MAYENSIS Torre and Ramsden 



Plate 55, Figures 7-9 



1914. Annnlaria maycnsis Torre and Ramsden, Nautilus, vol. 28, p. 50. 

 1920. Tudora (Tudorellata) mayensis Henderson and Bartsch, Proc. U. S. Nat. 

 Mus., vol. 58, p. 75. 



Shell helicoid, straw colored. Nuclear whorls almost 2, well rounded , 

 smooth, except for the last portion of the last turn, which shows the 

 beginning of the postnuclear sculpture. Postnuclear whorls inflated, 

 strongly rounded, marked by rather strong, retractively curved, axial, 

 sublamellar riblets, of which 90 occur on the second and 102 on the last 

 whorl. These riblets become slightly expanded at the summit. On 

 the last whorl finer threads occur between the sublamellar threads, 

 which vary from 2 to 5 in number. The spaces separating the coarser 

 threads also vary correspondingly in width. Suture narrowly chan- 

 neled. Periphery well rounded. Base short, well rounded, marked 

 by the continuation of the axial riblets. Umbilicus broadly open, 

 the umbilical wall marked by the continuation of the closely crowded 

 axial riblets and b}'" 13 spiral threads, which render the axial riblets 

 slightly nodulose at their junction; the outermost spiral thread is 

 considerably stronger than the rest. Last whorl solute for about 

 one-tenth of a turn. Aperture broadly oval; peristome double, the 

 inner almost coextensive with the outer except at the posterior angle, 

 where it forms a conspicuously projecting shelf; the outer narrowly 

 expanded but forming a conspicuous auricle at the posterior angle. 

 Operculum typically annularid. 



The specimen described and figured, U.S.N.M. No. 356320, is one 

 of 2 topotypes collected by Dr. Ramsden. It comes from ''La Isa- 

 belita," La Maya, Oriente Province. It has a little over 3 whorls and 

 measures: Length, 10.0 mm.; greater diameter, 12.8 mm.; lesser 

 diameter, 9.8 mm. 



ANNULARIA (ANNULARELLA) YUNQUENSIS (PfeifTer) 



Plate 55, Figures 1-3 



1860. Cyclostoma yunquense Pfeiffer, Malakozool. Blatter, vol. 7, p. 26. 



1861. Choanopoma yunquense Bland, Ann. Lyceum Nat. Hist. New York, vol. 7, 



p. 27. 

 1920. Annularia {Annularella) yunquensis Henderson and Bartsch, Proc. U. S. 

 Nat. Mus., vol. 58, p. 73. 



Shell turbinate, thin, translucent, yellowish flesh colored. Nuclear 

 whorls almost 2, well rounded, smooth. Postnuclear whorls increas- 



