280 PROCEEDINGS OF THE NATIONAL MUSEUM VoL 89 



TUDOKA (WRIGHTUDORA) GARRIDOIANA GABRIDOIANA ([Gnndlach] Pfelffer) 



Plate 28, Figure 2 



1860. Cyclostoma garridoianum [Gundlach] Pfeiffer, Malakozool. Blatter, vol. 

 7, pp. 26-27. 



The typical members of this subspecies come from El Ymique de 

 Baracoa. It is distinguished from T. (W.) garridoiana baracoensis in 

 having the outer peristome of the inner Up much less strongly expanded 

 and less strongly fluted. 



The specimen described and figured, U.S.N.M. No. 356381, has 4,5 

 whoris and measures: Length, 8.9 mm.; greater diameter, 5.4 mm.; 

 lesser diameter, 4.3 mm. 



TUDORINA, new subgenus 



Shell very large, elongate-ovate, marked by both axial ribs and 

 spiral threads on spire and base. Some of the axial ribs are gathered 

 into tufts at the summit. Outer peristome narrowly expanded. 

 Operculum typical of Tudora. 



Type: Tudora (Tudorina) rangelina (Poey). 



TUDORA (TUDORINA) RANGELINA (Poey) 



Plate 28, Figure 6 



1851. Cyclostoma rangelinum Poey, Memorias soVjre la historia natural de la 



isla de Cuba, vol. 1, p. 98, pi. 8, figs. 13-19. 

 1890. Colobostylus rangehnus Crosse, Journ. Conchyl., vol. 38, p. 303. 

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



Mus., vol. 58, p. 77. 



Shell rather large, broadly elongate-conic, varying from unicolor 

 straw color to brownish, banded with spiral bands, or with inter- 

 rupted spiral bands of brown of varying width and spacing; the in- 

 terior of the aperture varies with the exterior; the peristome is soiled 

 white, marked with brown, or unicolor. Nuclear whorls 2, well 

 rounded, microscopically granulose, the last portion of the last turn 

 showing the beginning of the postnuclear sculptm-e. Postnuclear 

 whorls well rounded, marked by retractively slanting axial riblets 

 and by spiral threads, the combination of the two forming a more or 

 less fenestrated pattern. Both the axial riblets and the spiral threads 

 become more numerous and more closely approximated on the last 

 whorl than they are on the early turns; 2 to 6 or even more of these 

 riblets become fused at the summit to form low whitish denticles, 

 which are appressed to the preceding turn. Suture well constricted. 

 Periphery well rounded. Base moderately long, well rounded, 

 marked by axial riblets and by spiral threads like those on the spire. 

 The base is openly, moderately broadly umbilicated, the umbilical 

 wall being marked by the continuation of the axial riblets and by 



