TURBONILLA. 331 



Turbonilla interrupt a. 



Fig. 173. 



Shell small, subulate, brownish-white, reticulated with numerous ribs and re- 

 volving lines, which arc interrupted by the ribs, and the faintly colored bands. 



Turritella interrupta, Totten, Sillim. Joiirn. xxviii. 352, fig. 7. — Adams, Bost. Joiirn. 



Nat. Hist. ii. 275. — Goulu, Iuv. 1st ud. 2G8, fig. 173. — De Kay, N. Y. Moll. 112, 



pi. 6, fig. 1 23. 

 Turbonilla interrupta, Stimpsov, Clieck Lists, 5. 



Shell small, very slender and pointed, pale brownish-white, glossy; 

 whorls eight or ten, slightly convex, the suture well-deiined, ^,.^ ^^^ 

 on which are from twenty-five to thirty straight, l)lunt ribs, 

 crossed by about fourteen revolving lines, which are inter- 

 rupted by the ribs ; these lines are arranged in pairs, but 

 so close to each other as not always to be distinguished, and 

 would usually be regarded as one ; on the anterior half of t. inter. 

 the lower whorl the ribs vanish, and the fine revolving lines "''""' 

 are uninterrupted. In fresh specimens may be seen a purplish band 

 just below the suture, and on the anterior whorl two faint yellow 

 ones; aperture a1)0ut one sixth the length of the shell, ovate, sharply 

 angular l)ehiiid ; outer lip sharp and simple, inner lip slightly everted. 

 Length, one fourth of an inch ; breadth, one tenth of an inch ; di- 

 vergence, twelve degrees. 



First found l)y Colonel Tottcn in the liarbor of Newport, Rhode 

 Island ; and since found by Professor C. B. Adams, in Dartmouth 

 Harl)or, l)y dredging below low-water mark. He has also found it 

 in New Bedford Harbor. Four fiithoms near East Boston. 



It is readily recognized by its slender, pointed, glossy appearance, 

 and its reticulated surface. Several recent and fossil species re- 

 seml)le it in shape and size, among which are Turbo elegantissinius, 

 Montagu, Turritella ccqualis^ Say, and T. laqueala, Conrad. 



This species does not belong to the genus Turritella, but will 

 probably come under the genus Eulima of Risso. 



Turbonilla nivea. 



Chemnilzia nivea, Stimpsox, Proc. Bost. Soc. iv. 114 (1851) ; Shells of New England, 40. 

 Turbunilla nivea, Stimpson, Ciieck Lists. 5. 



Shell aciculated, sul)-cylindrical, white, shining; whorls eleven, 

 flattened, longitudinally plicate ; folds straight, interstices perfectly 



