168 PROCEEDINGS OF THE ACADEMY OF [1899. 



The type (No. 79,009) was placed with T. Penistoni, from which 

 it is readily separated by its small size, straight ribs and very differ- 

 ent nucleus. 

 Turbonilla abrupta, new species. Plate VIII, fig. 4. 



Shell of moderate size, rather stout, dead white, irregularly 

 coiled. The first 3 or 4 whorls enlarge quite abruptly, while below 

 the increase is very gradual. Whorls flattened, 9 below the small 

 nucleus, transverse to the axis, with projecting whorls. Suture 

 deep, nearly straight. Transverse ribs about 20, rounded, oblique, 

 nearly straight, separated by wider, deep, flat-bottomed spaces 

 which terminate just above the suture in very square-cut ends. 

 Base well-rounded, smooth. Aperture somewhat elongated, ex- 

 panded below with rounded angles; inner-lip thin, reflected. 



Length, 4 mm. ; diameter, 1 mm. ; length of aperture, 1 mm. 



One specimen (No. 79,012) from St. Thomas, W. I., in the R. 

 Swift collection was labelled as T. pusilla C. B, Adams. That 

 species is described as ha\ang 10 or 11 whorls below the very oblique 

 nucleus, ornamented by 12 stout, transverse -ribs. L., .135; B., 

 .03 inches. 

 Turbonilla inclinata, new species. 



Shell small, slender, gradually tapered, dead white (weather 

 worn). Whorls flattened, 9 below the small nucleus, which has 

 very projecting whorls and is transverse to the axis. Suture deep 

 and straight. Transverse ribs, about 20, exceedingly oblique, in- 

 clined to Ihe left, straight, flattened, rather narrow, with wider, flat- 

 bottomed, moderately deep interspaces terminating at the periphery 

 of the body-whorls in square, clean cut ends. Pillar-lip thin, 

 reflected ; outer-lip broken. 



Length, about 3^ mm. ; diameter, |- mm. ; length of aperture, 

 about |- mm. 



One broken, dead specimen (No. 72,044), from St. Thomas, 

 AV. I. , in the R. Swift collection. It is very different from all 

 other known species, and is easily distinguished by the great ob- 

 liquity of the transverse ribs, in which character it resembles the 

 much larger species, T. Campanelke Philippi. 



Turbonilla compsa, new species. 



One very poor specimen (No. 79,015), without locality, in the R. 

 Swift collection, although without nucleus and with the outer-lip 



