262 PROCEEDINGS OF THE NATIONAL MUSEUM Vol.89 



continuation of the axial riblets and by 4 broad spiral threads, which 

 render the axial riblets conspicuously scalloped at their junction. The 

 umbilical wall is marked by the feeble continuation of the axial riblets 

 and by 12 spiral threads; here, also, the combination of the two forms 

 feeble scallops. Last whorl solute for one-tenth of a turn. Aperture 

 subcircular; peristome double, the inner moderately exserted; the outer 

 moderately, broadly expanded, a Uttle wider on the inner lip and the 

 parietal wall than on the outer and basal lip, marked by concentric 

 lamina. Operculum typically ramsdenid. 



U.S.N. M. No. 356490 contains 2 specimens from the type locality, 

 Malano Cave, Oriente Province, one of which we have figured. It 

 has a little over 3 whorls and measures: Length, 6.8 mm.; greater 

 diameter, 4.1 mm.; lesser diameter, 3.6 mm. The other specimen 

 has a little over 3 whorls and measures: Length, 6.9 mm.; greater 

 diameter, 4.5 mm.; lesser diameter, 3.8 mm. In one of these speci- 

 mens the first postnuclear whorl is slightly solute, showing the typical 

 solute characteristic of Ramsdenia. 



The exceedingly strong, hollow lamellose ribs will distinguish this 

 species from all other Ramsdenias. 



TUDORA (RAMSDENIA) NOTATA, new species 



Plate 25, Figures 5, 8 



Shell elongate-conic, flesh colored, with a conspicuous spiral band 

 of brown a little posterior to the middle of the base. Nuclear whorls 

 2, formmg a subglobular apex, well rounded, microscopically granu- 

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

 beginning of the postnuclear sculpture. The first two postnuclear 

 whorls are very strongly solute, corkscrew-shaped, the first one 

 marked by distantly spaced, lamellar axial riblets; the rest of the 

 postnuclear whorls inflated, strongly rounded, marked by sinuous, 

 rather closely spaced, sublamellar axial riblets, of which 84 occur on 

 the first of the remaining turns, 126 on the second, and 142 on the 

 last. Some of these riblets are expanded into hollow auricles at the 

 summit. The spaces between the axial riblets are not marked by 

 incised spiral lines, but are granular. Suture strongly constricted. 

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

 by the continuation of the sinuous axial riblets and by 2 spiral threads, 

 one of which is on the middle and the other marks the junction of the 

 umbilical wall with the base. The spiral cords render the axial 

 riblets conspicuously scalloped. The umbilical wall is marked by 

 the continuation of the feeble axial riblets and by 3 spiral threads; 

 the junction of these with the axial riblets renders them feebly scal- 

 loped. Last whorl solute for one-third of a turn. Aperture sub- 

 circular; peristome double, the inner moderately exserted; the outer 



