Oeoathi- 
Jos. 
G-Liculus. 
Nucleus. 
Centralis. 
Fraum, 
Ed 
WORMS. MOLLUSCA. 52. Echinus. 153 
The fore-part orbicular and perforated with 2 foramina, 
the hind-part 8-toothed: avenues lanceolate. 
Klein. ecbinod. ed. Lesk, p. 211. tab. 22. fig. C, D. 
Bireyn echin. p. 64. tab. 7. fig. 5, 6. 
Gualt. teft. tab, 110. fig: F. 
z. Margin 10-toothed. Seba Maf. 3. tab. 15. fig. 15, 16. 
Inhabirs———S4ell whitifh-afh; affulate, the pieces convex; 
crowva umbilicate : avenues emarginate. 
Pore-part otbicular entire, hind-pait unequally toothed: 
avenues lanceolate cleft and bent. 
Klein echin. ed. Left p. 212. tab. 22/9. B, E. 
Rumpf. Amb. tab. 14. fig. 1. 
Breyn. echin. tab. 7. fig. 3, 4. 
Bocce. objerv. p. 273. fig. 19. 
Valent. Muf; 3: p. 177. fig. 2: 
Argenville Conch. 2, tab. 7. fig. D. 
2. Klein echinod. ed, Left. tab. 4g. fig. 6, 7. 
Seba. Muf. 3. tab. 15. fig. 19, 20. 
Inhabits the Jndian Sea. Shell flat, fuborbicular, not perforated, 
compofed of hexangular pieces; the bafe flat with impreffed 
grooves: avenues oval: mouth rounded : vent oval. 
3. With 10 avenues on the crown, the rays firaight biporous 
and ficllate: mouth and vent approximate in tbe middle 
part of the bafe. 
Surface globular, with an orbicular. circumference: bafe 
narrow and flat in the middle: fides grooved: avenues 
pulvinate: crown excentric, 
P bef. Zee-egel. p. 131. m. 1. tab. 1. fig. 1—5. 
Klein. Echia. ed. Left. p. 213. tab. 48. 2a. 2 €. , 
Inhabits Shell yellowifh-afh : crowa perforated with 4 pores: 
mouth circular: «er rather oblong and fmaller than the 
mouth. 
Surface globufar, circumference fuborbicular: bafe pulvi- 
nate: fides very lightly grooved: avenues flightly pul- 
vinate: crown central. 
Phel. Zee-egel. 5..131. n. 2. tab. 1. fig. 6—10. 
Inhabits———perhaps a variety of the laft. 
Mouth very minute and orbicular, 
Surface globular, circumference fuboval: bafe a little nar- 
rowed: fides grooved: avenues fubpulvinate: crown 
central. ; 
VOL. IV.-2U. | Piel. 
