252 PROCEEDINGS OF THE NATIONAL MUSEUM Vol.89 



TUDORA (EUTUDOKEX) ROTUNDATA (Poey) 



Plate 23, Figure 2 



1851. Cydostoma rotundatum Poey, Memorias sobre la historia natural de la 

 isla de Cuba, vol. 1, pp. 419-420, in part, pi. 34, figs. 19-21. 



1856. Ctenopoma rotundatum Pfeiffer, Malakozool. Blatter, vol. 3, pp. 60, 126. 



1920. Tudora {Tudorops) rotundata Henderson and Bartsch, Proc. U. S. Nat. 

 Mus., vol. 58, p. 77. 



Shell small, yellow. Nuclear whorls decollated in all our speci- 

 mens. Postnuclear whorls decidedly inflated, strongly rounded, 

 marked by almost vertical axial riblets, of which 68 occur on the first, 

 108 on the second, and 150 on the last; these riblets are expanded 

 into strong auricles at the summit; they are likewise expanded at the 

 periphery, where these two elements meet and usually fuse. The 

 spiral sculpture consists of feeble indications of threads, of which 5 

 are present on the first turn, 6 on the second, and 7 on the last be- 

 tween summit and suture. These spiral threads render the axial 

 riblets som.ewhat wavy and slightly scalloped. Suture strongly con- 

 stricted. Periphery inflated, well rounded. Base rather long, well 

 rounded, marked by the continuation of the axial riblets and by 7 

 spiral threads, which grow progressively stronger from the periphery 

 toward the umbilicus, the last two about the umbilicus forming strong 

 scallops at their junction with the axial ribs. Aperture circular; 

 peristome double, the outer very broadly expanded, deeply notched 

 on the middle of the inner lip, posterior to which it is reflected over 

 the preceding turn, completely covering the umbilicus; the outer 

 peristome is marked by slender, concentric lamellae; the inner peri- 

 stome is slightly exserted. Operculum typically tudorid. 



Gundlach states of this species (Malakozool. Blatter, vol. 3, p. 

 126, 1856): *'It w^as gathered at the entrance of Santa Cruz de los 

 Pinos under stones and decaying leaves. The animal is pale straw 

 yellow with the tip of the feelers somewhat thickened and brownish. 

 The upper part of the neck with an ochraceous suffusion, the sides 

 darker." 



The specimen described and figured, U.S.N.M. No. 11042, is one of 

 7 collected by C. Wright at Loma de Rangel, Pinar del Rio. It has 

 3.2 whorls and measures: Length, 6.3 mm.; greater diameter, 4.5 mm.; 

 lesser diameter, 3.4 mm. 



TUDORA (EUTUDOREX) UNDOSA ([Gniidlach] Pfeiffer) 



Shell small, varymg in shape from elongate-ovate to elongate-conic, 

 flesh colored with a yellowish tinge. Nuclear whorls about 2, 

 strongly rounded, microscopically granulose, forming a slender apex. 

 Postnuclear whorls decidedly inflated, strongly rounded, and marked 

 by slightly retractively slanting axial ribs, which are not all of the 

 same strength, larger sublamcflar elements bemg separated by a 

 number of less strongly developed and less elevated ribs. At the 



