WORMS. MOLLUSCA. 52. 
Phelf, Zec-egeh p. 1 3.4. tab. z. fig. 1 3-1 5 ' 
Pall. Spicil. Zool. 9. p. 34 - I’b: 
round frequently on the fandy coalls of the 
Mouth orbicular. 
Ketherlaiuls. 
faia. 
Surface and baft: pulvinatc; cireumference obtufely oval; 
Tides hardly grooved : avenues flat ; crown a little pro- 
minent and central. 
Phelf 7,ee egel. tab. i. pg- 'S—zo. 
Klein echinoa. ed. Le^h- p. 210 - bl-Pg- °- 
Delic. Nat.fel. \.p. 90. lab. D \.fig. 10. 
Inliabits r^hs of a pea, ocliraccous and granulate. 
Surface gibbous on the fore-part, tbe hind-part flat and 
Hoping; circumference oblong-oval and nearly pen- 
tanonilar: bafe globular and a little narrowed: iides 
grooved: avenues fubpiiU'itvatc: crown central. 
Phelf. Zee egel. fab. 2 Jig, 2 l--25i 
Inhabits Bath unequal. 
^“ainus. Surface globular and more Hoping behind, circumference 
acutely oval: bafe globular: Tides groyved; avenues 
fubpiilvinate : crown central. 
Phelf. Zee-egel. tab. 2. ftg. 25-30. _ 
Inhabits probably a variety of Ech, minutus. 
^'‘fonius. Surface globular, circumference ovate Iiearl-fliaped and 
fubtrigonal: bafe pulvinate: fidss flightly grooved: 
avenues pulvinate : crown nearly central. 
Phelf. Zee egel. p. 1 36. tab. z.f:g. 3 1 -36._ 
inhabits- probably a variety of Ecb. minutus. 
C. Vent lateral -. tmuih with pencilled tentacula. 
n 
‘’tenta. 
a. Circular t m^uth central : vent fquare. 
Subconic, with io fpaces alternately narrower: avenues 5, 
lag flat and gaping at the up. 
Barbut tab. i\. fig. H. Zmb. tab. Ct. 
Klein tchin. ed. Lejk. 21 7 tab 20. A, JJ. 
Petpj. And) tab. \ \,fg S- Guall. tejl.t. 210./. (j. 
Brtyn fchin. p.6j^. tab ~!.fig 7 > 
litbShc Wf''" ol'eanU little convex- and and 
circumference I'omeivhat angular; the b,. c a f 
ded by an obtufely toothed vertical line ; vent placed on the 
furfacc and nearly marginal. 
