WORMS. TESTA CEA 57. Trochus. ITT 



57. TllOGHUS. Top Shell. 



416. Tr. zkiphinus. Conic, irn perforate at (lie base 

 spirally striate, the edge of each whorl with a raised 

 smooth margin. 



r. Z00/. /. 8s./. 103. 104.. Donov.t. 5*. Da>Ct>fta t. &/. 3. 4. 



Shell an inch long, nearly as much broad, .pointed, with 7 or 8 

 -A'horls, livid or pale red varied with darker lines and wave?, 

 within iridefcent: aperture angular: bafe ilattish, with circular 

 strfae, without fpots. 



117. Tr. tennis. Come, imperforate at the base,, spirally 

 granulate, no f margined at the edge of the whorls. 



Montague Bfit. Shells, t. io./. 3. Denovan t. 127. 



Shell an inch and a quarter long, rather less broad, brown or 

 jeddish with deeper marks : whorls with feveral rows of minute 

 granulations, but without the raited ridge at the edge : base with 

 feveral circles of fmall reddish fpots. 



418. Tr. exiguus. Conic, imperforate at the base, spi- 

 rally crenate, the edge of each whorl with u raised 

 tubercled margin. 



Donovan t. 8../. 2. Da Dosta t. <i.J, 4. Lister t. 6i6./. 2. 



Shell 3 eighths of an inch long, .grey-brown or purplish, with the 

 tip crimfon, fometimes fpotted with white ; within white, not 

 perlaceous : vuhorls 6, Wftih 4 or 5 fine crenulate ridges, and edged 

 with a tubercled wreath refemblrng a twissed cord : baft with ci- 

 tircular ridges. 



419. Tr. striatus. Conic, imperforate at the base, spi- 

 rally ridged and iinely striate longitudinally, not 

 margined or tubercled at the edge of the whorls. 



lister t. 621. /, 8. Donovan tab. i^.f. i. 



Size of the last, from which it differs in having 6 whorls hardly 

 definable by the line of feparation, with 8 or 9 fpiral ridges on 

 ach, crossed by fine longitudinal stria; ; in wanting the crimlon 

 tip, and large fpiral rib at the end of each w-horl, in being marked 

 by longitudinal reddish lines, and perlaceous within. 



420. Tr. tumidus. Subcomc, tumid, slightly perforated 

 at the base* 'with 5 projecting whorls very iinely and 

 spirally striate, the larger-one with a subcarinate 

 edge at the bottom. 



Montague Brit. Shells p. 280. tab. io./. 4. 



Shell a quarter of an inch long, strong, pointed but not taper, 

 grey or yellowish-brown, or dark purplish-brown with obfcure 

 undulations, within perlaceous. bafe rounded, with a fmall per., 

 foration which is almost clofed by age. 



421. Tr. crassus. Subconic, rarely perforated at the 

 base, with 5 rounded smooth whorls, grey -brown 

 with numerous zigzag purplish-brown lines : outer- 

 lip with a tooth-like protuberance at bottom. 



Donov.l.-ji. Da Costal. 6./. 7. T.r..lineatus. \ 



Shell strong, coarse, top-shaped,, perlaceous when the outer-coat 

 is off: lukorls rounded, separated by a depressed line, marked with 

 close-set zigzag purplish-brown or black lines.: pillar-lip smooth 

 white, not pearly; the white part extending ajmos-t acrofs the 

 baseband flattened as ifworn. 



422.. Tr. Magus. Subconic, perforated at the base, with 

 5 or 6 tumid whorls, finely striate, the ridges of each 

 rising into obtuse tubercles. 



,Br. Zool. t. 80. /. 107. Dtnov. t, 8./. i. Da Coita t. $.f. t. 



