WORMS. TJSSTACEA. bS, Turbo, tft 



iValker 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 

 whorl : Up and inside white. 



447. T.paltidus. Conic, thick, pale, with 5 rounded 

 slightly bicarinate whorls : pillar smooth. 



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



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

 suboval, margined. 



448. T. parvus. -Conic, strong, with 5 or 6 rounded 

 coarsely ribbed whorls. 



■Donov. t . 90, linn. Tr.t. 13./. 29. 3°'/« *3- 16.cdr. 



Shell about an eighth of an inch long; white, chefnut, or pa!« 

 rufous, often variegated* sometimes ribbed on the lower whorl 

 only, sometimes worn smooth ; apertitre suborbicular, 



449. T. costatus. <Glossy-white, with 4 or 5 much raised 

 whorls wi8i strong longitudinal ribs and fine trans- 

 verse strias : lip ^bordered by a prominent grooved 

 rim. 



Montagues, to./. 6. Linn. Trans* iii t. 13/. 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. 



•tinn. Trans, iii. J. 13* /. 25. 26. Walk. min. Shells./. 49, 



Shell about an eighth of an inch long, sometimes covered with a 

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

 Up hardly acute, 



451. T. Bryereus. Conic, strong, glossy- white, with 1 

 smooth finely ribbed whorls : pillar-lip smooth. 



Montague Brit. Shells tab. 15./, 8. Donovan t. 178./. 3, 



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

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

 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. tgb. 15./. a. 



Sheila, quarter of an inch long, thick, with about »* undulate 

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

 into fmalt cavities giving them a warty appearance, very finely 

 striate acrofs : aperture oval, oblique, strongly margined, 



453. T. denticutatus. Conic, white, obtuse : whorls 6, 

 with 9 or 10 ohltyue ribs denticulate at the line of 

 separation. 



Montague Bt it. Shells. p. 315. -». 23. 



Shell a quarter of an inch long, fubpetlucid, refernbling the last,, 

 but has only 9 or 10 ribs not undulate nor striate between them ; 

 aperture fuborbiculan, not margined, but thickened at the rib. 



454. T. Cimex* Oblong-oval; white, strongly ilecussa^S| 

 forming the interstices into raised dots. T j , ' 



Donovan t. 2,/. t. Da Costa t. 8./, 6. 9. 

 •tffctfan eighth of an inch long, thick, rather obtufe, wrtli v* 

 Q 



