134 PKOCEEDINGS OF THE NATIONAL MUSEUM vol.87 



The outer lip also is reenforced by a varixlike thickening behind the 

 peristome ; the inner lip is appressed to the columella as a callus. 



The type has 4.5 whorls, which measure : Length, 4.5 mm. ; greater 

 diameter, 2.3 mm. 



Our figure is taken from the type. 



Genus KURTZIELLA Dall 



KURTZIELLA PERRYAE, new species 



Plate IT, Tiguees, 7, 9 



Shell minute, elongate-turreted, milk-white with a creamy tinge. 

 The first nuclear turn is well rounded, smooth. This is followed by 

 a turn marked by closely spaced axial riblets and 4 spiral cords, the 

 latter rendering the axial riblets roundly nodulose at their junction. 

 The third cord is a little anterior to the middle and forms an 

 angle. Postnuclear whorls appressed at the summit, marked by 

 ver}'- strong axial ribs, which become enfeebled toward the summit 

 and extend anteriorly on the last whorl to the columella. These ribs 

 are more strongly pronounced on the middle of the turns, which they 

 angulate. Of these ribs, 12 occur on the first, 11 on the second, 10 

 on the third, fourth, and fifth, and 5 on the last half of the last turn. 

 The ribs are only about half as wide as the spaces that separate them. 

 In addition to these strong ribs slender, very regular, closely spaced 

 axial threads are present, which are crossed by spiral threads of 

 equal strength, the junctions of which produce slender rounded 

 nodules, that give to the entire surface of the shell a decidedly granu- 

 lose effect. This type of sculpture also characterizes the base where 

 the spirals are a little more distantly spaced and the nodulation less 

 ju-onounced. Columella short and stubby, marked by rather rough 

 oblique lines. Aperture oval, strongly channeled anteriorly with a 

 deep sinus immediately below the summit, whose outer edge is some- 

 what thickened and reflected. Anterior to the sinus the outer lip 

 is produced into a clawlike element. Inner lip appressed to the 

 columella as a callus extending over the parietal wall. 

 ^ The type, U.S.N.M. No. 508G46, was collected by Dr. Perry at 

 Sanibel Island, Fla. It has 7.5 whorls and measures: Length, 6.5 

 mm. ; greater diameter, 2.3 mm. 



This species, while in general type of sculpture and nuclear charac- 

 ters resembling Kurtziella limonitella Dall, differs from it in its much 

 slenderer form, much more distantly spaced and less numerous and 

 less strongly developed axial ribs, and much finer spiral sculpture. 

 It also lacks the dark-colored tip of the columella and nuclear whorls. 



