WORMS. TESTACEA. 58. Turbo- 181 



tf'alter min. Shells /. 24. Montague p. 309. 



Shell half an inch long, often covered with a thin yellowish- 

 brown skin, beneath which arc a few obscure striae on the larger 

 v;liorl : Up and inside white. 



417. T.patlidus. Conic, thick, pale, with 5 rounded 

 slightly bicarinate whorls : pillar smooth. 



Donovan Brit. Shells, v . tab. 178. /, 4. 



Me// half an inch long, with the lower-whorl swelling : aperture 

 suboval, margined. 



4t8. T.parvus. Conic, strong, with 5 or 6 rounded 

 coarsely ribbed whorls. 



Vonau. t. go. Linn. Tr. t. 13.7. 29.30.7. 15. iG.var. 



Shell about an eighth of an inch long ; white, chefnut, or pale 

 rufous, often variegated, sometimes ribbed on the lower whorl 

 only, sometimes worn smooth : aperture suborbicular. 



.419. T. costatus. Glossy-white, with 4 or 5 much : raised 

 whorls with strong longitudinal ribs and fine trans- 

 verse striae : lip bordered by a prominent grooved 

 rim. 



Montagjff't. to./. 6. Linn. Trans. Hi t. \%f. 13. 14. 



Shell about the eighth of an inch long, rather obtuse ; aperture 

 suborbicular with a ridge at the upper angle running, transversely 

 backward : lip bordered by a strong prominent grooved rim, 

 striate in the depression. 



450. T. striatus. Pellucid, glossy- white, with 6 rather 

 rounded whorls transversely striate and faintly ribbed 

 on the upper-part : aperture suboval, margined. 



Linn. Trans, iii. t. 13.7 25. 26. Walk. min. Shells, f. 49. 



Shell about an eighth of an inch long, sometimes covered i/pith a 

 brown skin, rather pointed, finely and regularly striate across i 

 tip hardly acute. 



451. T. Bryercus, Conic, strong, glossy- white, with 7 

 smooth finely ribbed whorls : pillar-lip smooth. 



Montague Brit. Shells tab. 15. /. 8. Donovan t. 178.7. 3. 



Shell nearly a quarter of an inch long, resembling T. costatus, 

 but i& double the size, has more numerous and finer ribs, and is 

 Without the transverse striae : Up not margined, 



452. T.coniferus. Taper, white, rather obtuse: whorls 

 6, with about 12 strong undulate ribs, somewhat pa- 

 pillous at the line of separation. 



Montague Brit. Shell, p. 314. te-A.'5./. 2. 



Shell*, quarter of an inch long, thick, with about 12 undulate 

 ribs, the tops of which at the sutures have the interftices formed 

 into fmall cavities giving them a warty appearance, very finely 

 .triate acrofs : apei lure oval, oblique, strongly margined. 



453. T. denticulatus? Conic, white, obluse : whorls 6, 

 with 9 or 10 oblique ribs denticulate at the line of 

 separation. 



Montague Btit. Shells, p. 315. n, 23. 



Shell a quarter of an inch long, fubpellucid, refembling the last, 

 but has only 9 or 10 ribs not undulate nor striate between tb.cm : 

 aperture fuborbicular, not margined, but thickened at the rib, 



454/ T. Ct'meo:, Oblong-oval; white, strongly decussate, 

 forming the interstices into raised dots. 



Donovan t. z.f. i. Da Costa t.B.f,6.g. 



SheU an eighth of an inch long, thick, rather obtufe, with 4 

 Q 



