146 WORMS. MOLLUSCA. 52. Echinus. 
*Vulgarise Orbicular; with ro avenues, 2 of them always near each 
other 
Morton Noribbampt. p. 235. s. 2. tab. 10, fig. 11, 
Lif}, lap cochi. p. 210* fig. 18. 
Luid th. brit. p. 46. n 944--950. 
Klein echtzod. lesh. tab, 13, fiy. C—k. f. 14, f. a——k. j 
Walco dico. t, E, 1. f- 1, 2. a. f. 2« 1. g. d. f. 2. g. f^ 1. 
Aidrow. Muy. 2- 455, f£ 3--6. 
Qlear Mu. Gottorp.t.21, f. 5, 6. 
Scoi pendrites, Ovum anguinum. Bef. gag. cont. tab. 19. 
- . Buftonite , Mw. Calcecl. p. 353. 
Run. Amboin. tab. 1, fig. 6—O. 
Mircat. metals. p. 246. figs 1—4. 
Mell. ech. Wagr: p. Fs ta0. 1, g..3s 4s 
Myll, memor. Saxon. p. 45-47» J§+ 2s 4» $1 Qs 10. 
Volkm. filef fubterr. p. A79. tad. 3€; fig. 6, E 
Helou. hithogr. angerb. p. 71V. tab. 8, fig. 13. 
Breyns echin. pr 57. tab. 2. fig. 35 4- 
Bytem. biblioth. app. tab. 25, fig. 270. 
Found frequently in a foflile ftatest in numberlefs varieties of form. 
Quadri- | With 4 avenues of pores. 
fafciatus. Klein echinod. ed lesk. p. 170. tab. 47, fige 3—Ss 
Gehler chara. foffil. extran. p. 133, Ag- te 
Waich diluv. tab, 9, d. fig. 3, g. fies 7--Qe 
"Found in. a foffile ftate: circumference fometimes orbicular, 
fometimes approaching to an oval, 
Sexfafiae With 6 avenues of pores. 
fus. Klein echimod, ed. lesk f. V70, fab. 50, fige 1,2. 
Gehler chara&. foffil. ext. p. 13, fig. 2» 
Walch diluv. monum. fuppl. Mes 9, g- fig. 4--6. 
Found hitherto only in a foffile ftate. 
b. The bafe exaéily circular. 
Subuculus. Avenues to, biporous; fpaces ro, s larger and 5 lefs: 
mouth and vent fmall, orbicular. 
Le. Klein echinod. ed. lesk. tab. 14, fig. l, me 
2. Klein echinod. ed lesk. tab. 14, f. n, 0. 
Found only in a fofüle ftate: tbe {paces befet with very fmall 
circles: pores of the avenues very minute and crowded clofe 
together, 
c. The bafe oval. 
Cyclofomus. Oblong, fubdepreffed : crown with 5 pores: mouth placed : 
in the middie and round: vent oblong and near the 
mouth. 
Klein 
