CUBAN AN NULARIEDAE— TORRE AND BARTSCH 327 



KEY TO THE SPECIES OF THE SUBGENUS TROSCHELVINDEX 



Shell cylindro-conic. 



Outer peristome broadly expanded. 



Outer peristome rayed tracta 



Outer peristome not rayed jiguanensis 



Outer peristome not broadly expanded. 



Axial and spiral sculpture conspicuous candeana 



Axial and spiral sculpture subobsolete inculta 



Shell not cylindro-conic. 

 Shell elongate-conic. 



Junction of axial ribs and spiral cords forming cusps arangiana 



Junction of axial ribs and spiral cords not forming cusps bebini 



Shell not elongate-conic but elongate-ovate. 

 Sculpture decidedly reduced in strength. 



Tufts at the summit strongly developed barbouri 



Tufts at the summit feebly developed minia 



Sculpture not decidedly reduced in strength. 



Inner lip of outer peristome crenulated rocai 



Inner lip of outer peristome not crenulated agrestis 



ANNULARIA (TROSCHELVINDEX) TRACTA ([Gundlach] Poey) 



Plate 37, Figure 7 



1S5S. Cyclostoma tradum [Gundlach] Poey, Memorias sobre la historia natural 



de la isla de Culia, vol. 2, p. 4, nornen nudum. 

 1858. Cyclostoma irackmi [Gundlach] Pfeiffer, Malakozool. Blatter, vol. 5, 



p. 45. 

 1865. Choanopoma iradum [Gundlach] Pfeiffer, Monographia pneumonopomo- 



rum viventium, suppl. 2, p. 102. 

 1920. A7inularia {Annularia) trada Henderson and Bartsch, Proc. U. S. Nat. 



Mus., vol. 58, p. 73. 



Shell very cylindro-conic, flesh colored, with rather broad inter- 

 rupted spiral bands of brown; the dots composing these bands are 

 arranged in both axial and spiral series, which give to the shells a 

 somewhat varicid appearance. Nuclear whorls decollated. Post- 

 nuclear whorls well rounded, marked by feeble, slightly retractively 

 slanting axial riblets, of which two or more are gathered into hollow 

 denticles at the summit. The spiral sculpture consists of feeble 

 threads a little stronger than the axial ribs, of which eight are present 

 between the summit and the suture on the last turn. The junctions 

 of the axial ribs and spiral threads scarcely form nodules, while the 

 spaces enclosed between them are shallow, elongated pits having their 

 long axis parallel with the axial sculpture. Suture well constricted. 

 Periphery strongly rounded. Base rather long, scarcely rounded, 

 narrowly, openly umbilicated, marked by the continuation of the 

 axial ribs and seven spiral threads, which are a trifle heavier than 

 those on the spire. Seven additional spiral threads are present within 

 the umbilicus. These are of about the same strength as those on the 

 base. The spiral threads and the axial ribs on the base and in the 



