Faba. 
Iuecualis. 
T . 
Ranaiaut, 
JBufonius, 
Placenta. 
WORMS. MOLLUSCA. 52. Echinus. 155 
Phelf, Zee-ezel, pe 134. tab. 2. fig. 13--15, 
Pall, Spicil. Zool. 9. p. 34. tab. Y. fig. 25. 
Found frequently on the fandy coalts of the Netherlands. 
Mouth orbicular, 
Surface and bafe pulvinate: circumference obtufely oval; 
fides hardly grooved: avenues flat: crown alittle pro- 
minent arid central. . 
Phelf. Zee egel. tab. 2. fig. 16--20, 
Klein echinoa. ed. Lesk. p. 216. tab. 37. fig, 6. 
Delic. Nat, fel. 1. p. 9o. tab. D i. fig. 10. 
Inhabits——-Size of a pea, ochraceous and granulate. 
Surface gibbous on the fore-part, the hind-part flat and 
floping; circumference cblong-oval and nearly pen- 
tangular: bafe globular and a little narrowed: fides 
grooved: avenues fubpulvinate: crown central. 
Phelf. Zee egel. tab. 2 fig, 21--25. stake 
Inhabits Back unequal. 
Surface globular and more floping behind, circumference 
acutely oval: bafe globular: fides grooved: avenues 
fubpulvinate: crown central. 
Phelf. Lee-egel. tab. 2. fig. 25--30. 
Inkabits——probably a variety of Ech, minutus. 
Surface globular, circumference ovate heart-fhaped and 
fubtrigonal: bafe pulvinate: fides flightly grooved: 
avenues pulvinate: crown nearly central. 
Phelf. Zee-egel. p. 136. tab. 2. fig. 31 -36. 
Inhábits—— probably a variety of Ech. minutus. 
C. Vent lateral: mouth with pencilled tentacula. 
a. Circular; mouth central: vent Squares 
Subconic, with to fpaces alternately narrower: avenues s, 
lax flat and gaping at the tip. 
Barbut tab. vi. fg. 11. Rumpf. Amb. tab. v4. zig. G. 
Klein echin. ed. Lefé. p. 217 tab 20. A, B 
Petiv. Amb tab. 11, fig. 5. Gualt. tefl. t. 210. f. G. 
Bruyn echin. p. 64. tab. 7, fig 7, S. 
Seba Muf. 3. tab. 15. fig. 21, 22." ! 
Inhabits the Southern Ocean; a little convex and and conoid ; the 
circumference fomewhat angular; the bafe flat : fpaces divi- 
ded by an obtufely toothed vertical line; vent placed on the 
durface and nearly marginal. 
U2 b. Heart- 
