204 PROCEEDINGS OF THE ACADEMY OF [May-Oct., 



may be seen; aperture serailunate; peristome thin; columella slightly 

 reflexecl; parietal wall thin. 



Alt. 1.3, diam. 1.88, alt. of aperture .75, diam. .88 mm. 



Picked from leaf mould collected at the Costa Mine, about 15 

 miles from Bueicito, Prov. Oriente, Cuba, by Louis H. Bregy in 

 March, 1920. 



The type is in the cabinet of The Academy of Natural Sciences 

 of Philadelphia, being tray number 46,089. 



This species has narrower whorls and smaller umbilicus than 

 Zonitoides maya Pils.; Z. 'paracusis Bkr. is smaller; and Striatura 

 neomexicana Pils. has a wider umbilicus, fewer whorls, is more de- 

 pressed, and has a duller surface. 



Caecilioides domingensis new species. PI. VI, flg. 15. 



Shell small, subcylindrical, translucent corneus; apex obtuse; spire 

 high, composed of four and one half moderately convex whorls; 

 suture rather deep; surface shining, sculptured with a few irregular 

 incremental striae; base convex, imperforate; aperture about one- 

 third the altitude of the shell, oval, narrow above and broader below; 

 lip acute, slightly arcuate; basal hp convex; columella truncate, 

 comparatively thick, concave; parietal wall nearly straight; parietal 

 callus thin. 



Alt. 2.27, diam. .79, alt. of apertui-e .75, diam. .54 mm. 



The types are tray number 44,654 in the Academy's collection, 

 and were picked from earth collected by Dr. W. L. Abbott, one mile 

 northwest of Sanchez, Santo Domingo. 



This species has a deeper suture, more convex whorls, and a more 

 obtuse apex than Caecilioides consobrina Orb. 



Opisthosiphon maynardi new species. PI. VI, figs. 0, 10, 11, 13. 



Shell conical, thin, opaque, reddish brown above and greyish- 

 yellow below, and a white line composed of sharp points at the 

 suture; apex truncate, widely perforate, provided with a bluish 

 plug of shell matter in the end of the decollated whorl; spire high, 

 conic, composed of nearly four convex whorls; suture deep, acutely 

 dentate; the last whorl free from the penultimate whorl near the 

 aperture and again united to it by the parietal callus; last whorl 

 evenly arcuate, provided with two slightly thickened, white, spiral 

 Hues near, and four others visible within, the umbilicus. The sur- 

 face of the shell has a dull silk-like sculpture, and many very indis- 

 tinct vertical costae, about sixty on the penultimate Avhorl; body 

 whorl nearly smooth near the aperture; aperture entire, wide, ellip- 



