WORMS. MOLLUSCA. 52. Echinus. 153 
^^°daay. Xhe fore-part orbicular and perforated with 2 foramina, 
* the hind-part 8-toothed; avenues lanceolate. 
ediniui. ed. Lesk.p. 211. tah. zz.fig. C, D. 
Breyn echin. p. 64.. tab. 7. fig. 5, 6. 
Gualt. teji. tah. 1 10. F. 
2’ Margin lo-touthed. Seba Muf. 3. tab. 15.7%- 15, i6- 
■ Inhabits -Shell whitilh-afli ; adulate, the pieces convex ; 
cro-Mti urabilicatc : avenues emarginate. 
^’’^‘culus; Pore-part orbicular entire, hind-part unequally toothed = 
avenues lanceolate cleft and bent. 
Klein echin, ed. Lejk p. 212. tab. zz‘ Jig. E, F, 
Rumpf. Ainb. tab. \t^.jig. 1. 
Bretn. echin. tab. p.fig. 3, 4-. 
Bocc. obferv. p, 273. f.g. 15. 
Valent. Muf. 3. p, 1 77. jig. z. 
Argenville Conch. 2, tab. fijg. D. 
z. Klein echinod. ed. Lejk. tab. ^t^.fg. 6 , 7. 
Seba. Muf. 3. tah. tS-flS' * 9 > 
Inhabits the Indian Sea. Shell flat, fuborbicular, n'ot perforated, 
compofed of hexangular pieces ; the bafe flat with impreffed 
grooves: avenues o\2\'. rounded : vent ova\, 
g. With 10 avenues on fhe crown, the rays flralght biporous 
and ficllate : mouth and vent approximate in the middle 
part of the baje. 
Surface globular, with an orbicular circumference: bafe 
narrow and flat in the middle: ftdes grooved : avenues 
pulvinate: crown excentric. 
Phef. Zee-egel.p, 131. a. 1. tah. l.fig. 1 — 5. 
Klein. EcLin. ed. Lejk. p. Zi^.tab. 4K. 2 a. 2 e. 
Inhabits Shell ycllowifli-afti : crovun perforated with 4 pores: 
mouth circular: vent rather oblong and finaller than the 
ntoiuh. 
Surface globufar^ circumference fuborbicular-: bafe pulvi- 
nate : lides very lightly grooved: avenues llightly pul- 
viiiate: crown central, 
Phelf. Zeregel. p. 131. a. 2. tab. i.fg.bs — 10. 
Inhabits •peihaps a variety of the lait. 
Mouth very minute and orbicular. 
Surface globular, circumference fuboval; bafe a little nar- 
rowed: fides grooved: .avenues fubpulvinate: crown 
Central. 
‘^‘is. 
VOL. IV.--U 
Plelfi 
