199 WORMS. TESTACEA. 59, Helix. 



Jdams Linn. Trans, ill. p. 67, 



Shell imperforate, aperture with a much fpread margu.,, 



D. Taper. 



539, H. elegantisaima. White, glqssy, tapering to a 

 fine point, with oblique equidistant grooves: aper- 

 ture a little angular below. 



Montague t. io,J. 2, Donovan t. i"jg,f, \. Turbo, 



Shell about a quarter of an inch long, often covered with a brown 

 skin, with 9-13 flattish whorls, the ribs of which arc broader than 

 the grooves ; aperture fuborbicular ; inner lip a little reflected, 



540. H, dtcussata. White, tapering to a fine point, finel/ 

 decussate: aperture angular at both ends, 



Montague Brit. Shells f. 399. tab. 15, f. 7. 



Shelly tenths of an inch long, with 8 or 9 slightly raifed whorls> 

 strongly striate longitudinally., and crossed by very fine lines : 

 aperture fuboval, contracted at both ends : lip slightly reflected. 



541. H, subulata. Pale flesh-colour, with testaceous 6r 

 chesnut spiral bands, tapering to a fine point, smooth ; 

 aperture ovaL 



Da Costa p. 117. Donovan t. 172. Turbo. 



Shell 3 quarters of an inch long, glossy., fometimes white or 

 reddish, with about 10 tlat whorls, marked with lighter or darker 

 bands ; aperture Kiuch rounded at top, and contracted at bottom. 



542, H. polita. White, quite smooth, tapering to a point, 

 imperforate : aperture oval. 



J?r, Zool. t. 79, 'upper fig, Donovan t, 177. Turbo. 



Shell about half an inch long, polished, with 9-13 flat whorls t 

 aperture ending in a sharp point ; inner-lip reflected, 



543. H. bifacinta. White, with an interrupted brown 

 band, oblong, slightly wrinkled and umbilicate: 

 aperture oval, 



$r, Zooi. t. 82. /, 119, Donov. tab. 18. * Turbo. 



Shell nearly 3 quarters of an inch long, with rather rbunded 

 whorls, and brown or chesnut streaks forming a band or two at the 

 base : Up a little reflected, forming a s^naU perforation, 



544, H. octona. Pale horny, with 8 rounded finely 

 striate whorls, very slightly umbilicate ; aperture 

 roundish. 



linn. Transact, viii. p. 211. tab. ^f. 10. 



Shell about the size of a grain of rye, with 8 tumid whorls; 

 perforation so fmall as hardly to be diftinguished : aperture near- 

 ly orbicular, 



545. H. octanfracta. Horn-colour, with 8 flattish finely 

 striate whorls, imperforate : aperture oval. 



$r. Zoolt. 86. /. 135. Montague, tab, i,/. 8, 



Shell above ,5 eighths of an inch long, often covered .with a 

 blackish skin : differs from the last in being of a wore conic form, 

 without the least trace of perforation, and in the whorl* not 

 being fo distincly feparated, 



546, H. Lackhecmensis,. Rusty-brown, oval-oblong, a little 

 rugged, slightly perforated : aperture rouwdish-lu 

 nate, with a reflected margin. 



Montague Brit. Shells p. 394, tab, u^/, 3. 



Shelf 3 quarters of an inch long, rusty-brown varying to horn, 

 colour and grey, with 7 flattish whorls : aperture whitish, with 

 often a purplish tinge : lip reflected, and forming a linear cavity, 



