324 TURBONtLLA. 



both crossed by numerous microscopic spiral strioe, ribs fading 

 out at the periphery of the last whorl. Length, 2 mill. 



Atlantic Ocean. 

 T. COMPRESSA, Jeffreys. PI. 75, fig. 88. 



Cylindrical, a little compressed in the middle of each whorl, 

 thick, semitransparent, glossy ; whorls 11, with about 25 longi- 

 tudinal ribs and subequal interspaces ; color white, a young 

 specimen having a broad, obscure chestnut-colored band. 



Length, 6'25 mill. Mediterranean, Azores, Cape Verd Is. 



T. PAUCISTRIATA, Jeffreys. PI. 75, fig. 90. 



Rather thick, semitransparent, lustrous; whorls 9, flatly con- 

 vex, with about 20 straight, slight, irregular longitudinal ribs, 

 fading out on the body-whorl. Length, 6-8 mill. 



Mediterranean ; W. Coast of Africa ; 



Culebra, Danish West Indies. 



Dr. Jeffreys was somewhat doubtful of the distinctness of this 

 shell from T. compressa. 



T. SEMICOSTATA, Jeffreys. PI. 75, fig. 89. 



Rather thick, semitransparent, glossy ; whorls 9, flattened in 

 the middle, with a few slight longitudinal ribs, sometimes cover- 

 ing the upper whorls only, but in most disposed irregularly over 

 the shell ; in one specimen the whole surface is microscopically 

 spirally striated. Length, 3'75 mill. 



Cape Breton, Gulf of Gascony. 



T. MACANDRE^, H. Adams. PI. 74, fig. 59. 



Solid, whitish or light fulvous ; whorls 16, slopingly flattened, 

 with numerous rounded ribs, fading at the periphery, and equal 

 smooth interspaces. Length, 18-24 mill. Vigo. 



Described by Mr. Adams as T. speciosa, preoccupied. 



T. OBLIQUATA, Phil. PL 75, fig. 80. 



Hyaline; whorls 9, convex, with about 14 oblique small ribs 

 and much wider, smooth interspaces. Length, 3 mill. 



Mediterranean Sea. 



Unfigured Species. 



T. ACUTISSIMA, Monts. Mediterranean. 



T. ROSEA, T. MULLERI, T. SfiNEGALENSis, Maltzan. 



Ins. Goree, W. Africa. 



