t$6 WORMS. MOLLUSC A. 52. Echinus; 



prblculatus Granulate; avenues biporous, the pores united by a tranf- 

 verfe imprelfed line, and the intermediate fpaces di- 

 vided by a ferrate line in the middle, the reft of the 

 furface cj-parted. 



Klein, ecbinod. ed. leske, p. 194. tab. 41, fig. 2. 



Walch monum. diluv. p. i 8 1 . tab. 41 , /. 2. 



Bourg. pet, -if. p. 77. tab. 53, fig. 352. 



Found in a petrified ftate, and a very indiflinct fpecies. 



f. Flat on both fides ; the avenues refembling petals : mouth 

 central, fiat, toothed: crown with spores* 



t With ajinuatc margin and perforate furf ace. 



&ifcrist The bafe with 5 grooves and zoflexuous radiate lines: neaf 

 the vent 2 oblong foramina. 



Kmin ecbinod. ed. lesk. p. 169. tab. 21. A, B, 



Lehc. tiut.fi. 1. p. 92. tab. D. I. fig. I. 



St. Mutter Lmneijcb. Katurf 6. B. t*b.8,f. 8. 



Inhabits •• ■ 4 above a little convex and pale ycHowifh-afh, 

 beneath ochraceous: fometimes roundifh, fometimes obtuiely 

 triangular; the margin fometimes finuous, iometimes flexu- 

 ous : mouth obtuiely pentangular: vent fometimes circular' 

 fometimes trsnfverlely oval j .the adjacent foramina fomctimei 

 /horter and fubovate, fometimes longer, narrower or linear: 

 avenues refembling ovate petals or leaves, confiding of a fingle 

 inner row of dots, and a row of oblique ftriae penetrating the 

 (hell, 



Pehtaporus. Avenues emarginctte at the tip : .vent near the mouth, with 

 5 foramina, 



Klein ecbinod, ed. leske, p. 197. tab. 2\ } /ig. C, D, 



Hugby Barb. 280. tab. 24, fig. 3, 4, 



Seba Mul. 3 tab. 15,/. 9,10. 



Argennj. conch. 2. p. 63. tab. 7, fg. C. 



Gualt. tejl. tab. lie, fig. E. 



Delic. nat.fel. l. p. 93. tab D. i. fg. 1 6, 



Inhabits : obtuiely pentagonal ; above whitifh-afh with a 



reddifh tinge ; beneath hollowed towards the middle, white 

 with a little yellow and blue veins ; jhell with prorninentdivi* 

 lions: avenues oval: mouth obtufcly pentagonal, the lips & 

 little prominent and perforated with a foramen: <vent nearly 

 fquare with adjacent linear and fuboval foramina; crown 

 rnarhed with a pentagonal liar. 



iitxapcrus. Orbicular, with narrow avenues, and 6 narrow foramini 

 near the vent. 

 Klein ecbinod. ed. leske, p. 199. tab. 50, fg. 3, 4. 



Seld 



