354 PROCEEDINGS OF THE NATIONAL MUSEUM Vol.89 



umbilical wall is marked by the closely crowded axial riblets, which 

 here are a trifle weaker, and by 10 spiral threads, of which the outer- 

 most is much stronger than those withm, which are of equal strength 

 and almost equal spacing. Aperture subcircular; peristome double, 

 the two peristomes coextensive on the outer and basal lip, while on 

 the inner lip the outer extends slightly beyond the inner ; at the poste- 

 rior angle the outer forms an auricle which is adnate to the preceding 

 turn, while the inner projects as a strong shelf. Operculum typically 

 aimularid. 



The specimen described and figured, U.S.N.M. No. 35C331, is a 

 topotype collected by Gundlach at Cafetal Ermitano, Yateras, Oriente 

 Province. It has 4.4 whorls and measures: Length, 8.8 mm.; greater 

 diameter, 11.9 mm. ; lesser diameter, 9.3 mm. 



Gundlach states of the animal of this species (Malakozool. Blatter, 

 vol. 6, p. 74, 1859): "On clifi^s. Animal gray with whitish dots, 

 especially so' on the rosy colored head. Feelers from the middle to 

 the base red but with brownish tip. Snout reddish, red at the edge and 

 brown at the base." 



ANNULARIA (ANNULAREX) INCERTA. new species 



Plate 45, Figures 1-3 



Shell broadly turbinate, flesh colored, with whitish diaphanous spots 

 that are arranged m spiral series ; peristome white ; interior of the aper- 

 ture orange. Nuclear whorls 1.6, small, inflated, strongly rounded, 

 forming a rather elevated spire. Postnuclear whorls inflated, strongly 

 rounded, marked by very strong, almost lamellar axial ribs, of which 

 38 are present on the first postnuclear whorl. On the succeeding 

 turn there is a differentiation into stronger ribs with finer threads 

 between them. These, however, are few in number, varying from 1 

 to 3, which gam rapidly in strength so that on the last turn there is 

 a complete confusion of strong and fine threads ; sometimes 5, 6, or 8 

 of the finer threads may be present between the coarser ribs; again, 

 they may be absent altogether, about 80 of the stronger threads 

 being present on the last turn. The strong axial ribs form rather 

 conspicuous auricles at the summit. The spiral sculpture consists of 

 feeble threads which scarcely render the axial riblets weakly nodulose. 

 Suture strongly, deeply chamieled. Periphery well rounded. Base 

 short, strongly rounded, openly umbihcated, and marked b}^ the 

 continuation of the axial ribs and weak indications of spiral threads. 

 On the umbilical wall, however, the spkal sculpture becom^es decidedly 

 pronounced, 1 1 strong threads being present, of which the outermost 

 one marks the edge of the umbilicus, which is much stronger than the 

 rest. The junction of the axial ribs and spiral threads within the 

 umbiHcus forms sharp nodules. Aperture broadly oval; peristome 



