1899.] NATURAL SCIENCES OF PHILADELPHIA. 151 



importauce, as it contains the specimens figured in Try on' s Manual 



as Adams' species. 



Turbonilla Pilsbryi, new species. Plate VIII, fig. 9. 



Shell of good size for the genus, stout, pure opaque white, in 

 some places semitransparent, lustrous, regularly coiled, with the 

 entire surface, except the nucleus and ribs, covered by numerous, 

 unequal, spiral grooves, so crowded that the spaces between them 

 appear like fine, uneven threads. Whorls swollen, indistinctly 

 bevelled on the top, 6 below the prominent, oblique, flattened 

 nucleus. Suture distinct. Transverse ribs about 26, very deli- 

 cate, scarcely more than little raised lines, slightly oblique, the 

 inclination toward the aperture (to the right), separated by wide, 

 shaUow spaces. Body-whorl elongated, well-rounded, with the 

 ribs extending well over the base, gradually decreasing in size to 

 the inner-lip. Aperture oblique-ovate with continuous peritreme ; 

 inner-lip represented by a thin glaze; columella having an obscure, 

 median, toothlike swelling; outer-lip thickened within, with well- 

 rounded edge. 



Length, about 4^ mm. ; diameter, about li mm. ; length of 

 aperture, about 1 mm. 



One specimen (No. 72,045) found at St. Thomas, W. I , by R. 

 Swift. 



This very beautiful species was labelled as T. Riisei Morch, 

 which was originally described by Morch (Syn. Moll. Mar. Ind. 

 Occid., p. 165, 1875) as having the form of Bmoina Catesbyana 

 d'Orbigny (Hist. I' He de Cuba, atlas, PI. XTI, figs. 1, 2). The 

 type from St. Thomas, W. I., collected by Riise, Avas club- 

 shaped, thick, deep yellow, white at the suture, Avith two darker 

 bands, the superior one near the suture and the other median, with 

 very delicate spiral strise. Costse numerous, about 40, continuous 

 to the aperture, which is ovate Avith a continuous thickened peri- 

 treme, with a thickened white lip and an indistinct columellar 

 fold. Length, 3| mm. ; diameter, 1^ mm. 



The figure given by Tryon {Manual, PI. 76, fig. 27), although 

 said to be figured from the type, represents a species very difTerent 

 from either form. 

 Turbonilla asperula, new species. 



Shell small, slender, golden brown, Avith slight lustre, consisting- 

 of 6 moderately convex, someAvhat shouldered Avhorls belou' the 



