174 PROCEEDINGS OF THE ACADEMY OF [April, 



This species is easily to be distinguished from N. canrena by the 

 noticeably channelled suture, absence of subsutural plication, and 

 the characters of the umbilicus. Gabb grouped them with the 

 .specimens of A'', canrena. 



The type and seven other specimens are No. 2875, A. N. S. P. 



Aclis (Amblyspira) bartschiana n. sp. 



The shell is long and slender, smooth. Nuclear whorls lost; the 

 following whorls are slightly concave, the suture prominent as a 

 sharp, low ridge; the penult whorl has an angle projecting incon- 

 spiciously just above the suture, last whorl is sharply angular in 

 front, the angle entirely disappearing on its last half. The aperture 

 is small, ovate, diagonal. Peristome continuous across the parietal 

 wall, the columella somewhat thickened, simple. 



Length 3.6, diam. 0.95, length of aperture 0.75 mm.; 10 post- 

 nuclear whorls. 



Type No. 3016, A. N. S. P. 



A characteristic little shell, named for Dr. Paul Bartch, whose 

 industry and acumen in the classification of Pyramidellidoe are bring- 

 ing order into this once chaotic group. 



Pyramidella forulata famelica n. subsp. 



The shell closely resembles P. canaliculata, but differs by its 

 narrower contour, smaller sutural channel and by having faint 

 trace? of spiral striation. Last whorl has a small peripheral carina, 

 but only the weak trace of a furrow below it. There is fine crenula- 

 tion below the suture and a narrow umibilicus bounded by a cord- 

 like fasciole. 



Length 10.5, diam. 3 mm.; 13 whorls (apex entire). 



The shell is somewhat narrower than the Bowden form which we 

 take to be the adult stage of P. forulata Guppy,^ yet a thorough 

 comparison of good series may show that there are transitions. 

 The type of forulata is, we believe, a quite young shell. 



Turbonilla (Pyrgiscus) beatula n- sp. 



Shell rather rapidly tapering, the whorls slightly prominent and 

 convex below the suture, elsewhere nearly flat, with sculpture of 

 vertical, rounded ribs about equal to the intervals, and extending 

 from suture to suture. Intervals minutely striate vertically, the 

 striae cut by incised spiral lines, of which there are eight on the 

 penult whorl. A few similar spirals may be seen on the otherwise 



3 Pyramidella forulata Guppy, in Dall, Proc. U. S. N. Mus., XIX, p. 315, PI. 

 '28, fig. 13. 



