SI* WORMS. TESTACEA. 81. Helix. 



Shell black immaculate, with fpiral fubconvex ftrias and c or 

 whorls, each of the whorls in the upper- part armed with i< 

 iharp fpines: aperture large wide and white; outer lip acute, 

 inner-one thick. 



Navia. Shell tranfverfely grooved, white with blacktfh ftria? 

 fpire pointed, with flattifh whorls, the firft larger and 

 round. 

 Kamm\ Cab. Rudolst. tab. S.fzg. 3. 

 Inhabits the fouthern Ocean: a little more than an inch long. 



Afpera. Shell pointed cinereous tranfverfely ftriate : whorls toothed 

 and marked with red ftreaks. 



Chetnn. conch. 9. tab. I $6: fig. 1 259, 1260. 



Inhabits fea marines of Coromandel, $\ — 8 lines long. 



Shell ovate pellucid, fometimes dirty grey-brown with convex] 

 fpiral ftris and undulate longitudinal tuberculate ftreaks: 

 whorls 7-8, each armed with 1 2 fpines : aperture ovate, outer- 

 lip acute, inner-one brown gloffy, throat pale with pellucid 

 punctured red ftreaks. 



*Stagnalis, Shell imperforate, ovate tapering to a point, fomewhat an- 

 gular by feveral longitudinal wrinkles: aperture ob-J 

 long-oval. 



Donovans Brit.Jhells. ii. tab. 51../%. 2, 



Da cost a Brit, conch, tab, 5. fig. 1 1. 



Pennant Brit. Zool. iv. tab. 8b, jig, 1 36. A. 



Lister conch, tab. 132, Jig. 21, Anim angl. t. 2. f. 21. 



Lifter Exerc anat. tab. z.fig.^, 4. 



Bonan recr, and Muf. kirch, $-fiig. 5$. 



Gualt, test. tab. 5, I. L. Klein ofir, t, 3./. 69. 

 J} Argetw. conch, tab. 2J,fig. I, 2. Zoom, t, S.f, 5,b. 



Seba Muf. 3. tab. ^. fig. 52, 53. 



Born Muf. Caf, Vind. teH.tab. 16. fig. 16. 



Chemn. conch 9. tab. *$$.fig- 1 237 — 1240. 



Inhabits itill waters of Europe: 2§ inches long. 



Shell thin brittle, whitifh yellowifh or cinereous, rarely horny or 

 black, fometimds glabrous, fometimes finely ftriate longitudi- 

 nally : whorls 6 or 7, the firft ventricofe: lip repand and not 

 margined. 



*Fragilis* Shell imperforate, ovate tapering to a point, round pellu- 

 cid: aperture oblong-oval. 

 Lister tab 8. fig. 3. Seba Muf 3. t. 39./; 41—46. 

 Martini Berl. Mag. 4. tab. 9. fig. 35. 

 Schrcetfiuf conch, tab. 7. fig. 8. 

 2. Argenv. conch, tab. zy.n. 6, fig, 4, 



Inhabits 



