iss WORMS. MOLLUSCA. 52. Echinus: 
Orbiculatus Granulate ; avenues biporous, the pores united by a tranf- 
verfe imprelled line, and the intermediate fpaces di- 
vided by a ferrate line in the middle, the reft of the 
furface §-parted. 
Klein. ecbinod. ed. leske, p. 194. tab. 41, figs 2. 
Walch manum. diluv. p. 181. tab, 41, fs 2- 
Bourg. petrif. p. 27. tab. $3, fig. $52. 
Found in a petrified flate, and a vcry indiflin& fpecies. 
f. Flat on both fides; the avenues refembling petals: mouth 
central, flat, toothed: crown with 4 pores. 
+ With a finuate margin and perforate furface. 
Biforiss The bafe with $ gtooves and ro flexuous radiate lines: near 
the vent 2 oblong foramina 
Kein echinod. ed. lesk. p. 169. tab. 21. A, B, 
Lele. nat. fl. Y. p.92. tab. D. i fig. 1. 
St. Muller Linneifch. Naturf. 6. B. tab.8, f. 8. 
Inhabits ; above a little convex and pale yellowith-ath, 
beneath ochraceous: fometimes roundifh, fometimes obtulely 
triangular; the margin fometimes finuous, fometimes flexu- 
ous: mouth obtufely pentangular: went fometimes circular, 
fometimes tran{verlely oval; the adjacent foramina fometimes 
fhorter and fubovate, foinetimes longer, narrower or linear: 
avenues vefembling ovate petals or leaves, confifting of a fingle 
inner row of dots, and a row of oblique ftriz penetrating the 
fheil, 
Pestaporus, Avcnnes emarginate at the tip: vent near the mouth, with 
$ foramina. 
Klein echinod, ed. leske, p. 197. tab. 21, fig. C, D. 
Hugh, Barb. 280. tab. 24, fig. 3, 4. 
Seba Muf. 4. tab. I$, f. 9, 1o. 
Argenu. conch. 2. 5. 63. tab. 7, fig. Cs 
Gualt. tef. fab. 110, fig. E. 
Delic. nat fel. V. p. 93. tab D. i. fig. 16, 
Inhabits ——¢ obtutely pentagonal ; above whitifh-afh with a 
reddifh tinge; beneath hollowed towards the middle, white 
with a little yellow and blue veins ; fiel with prominent divi- 
fions:- avenues ovals. mouth obtufely pentagonal, the lips a 
little prominent and perforated with a foramen: went nearly 
íquare with adjacent linear and fuboval foramina; croaa 
marked with a pentagonal ftar, 
Hewegoruss Orbicular, with narrow avenues, and 6 narrow foramina 
near the vent. 
Klein echinod ved, efe, 2.199: tab. $0, fig. 35 4« | 
Seba 
