WORMS. MOLLUSCA. 52. Echinus. 139 



«?&?// green ifh -a fh a little inclining to chefnut, and pulvinate at 

 the bafe : /pare* with 4 tubercles placed in a rhombic form : 

 pores of the a<vennes curved, in 4 or 5 pairs. 



* Qvar'ms, Ovate ; the larger fpaces bifarioufly tuberculate. 

 Plot. Ox for J pi. t- !08 tab. c, fig. 6. 

 Laid, lithoph p. 46. n 934 — 949. tab. 9, fig. 940. 

 Bourg °etrif p. 76. », 340. tab. 52, fig. 240, 34c, 346. 

 Found in a petrified itate in England and Normandy. 



Piadsma. Hemifphxrical, depreffecl, with 5 avenues longitudinally 

 tuberculate ; the fpaces lanceolate. 

 Klein ed. lijk.tah.yj*fig. L. 2 ty£ 51, §• I, £. 2. . 

 Barbuty tab. \\,fg. 3. P^/^. Amb. tab. 8, /%. 5. 

 Rumpf. Muf. p. 35. /?£. 13, n. c. /#£. 14. /. B. 



2. With tuberculate bands. Phcls. Zee-egeL p. 29, ». 27. 



3. Greemih -yellow, &£<2 A/«/C i* tab, 11 y fig. ic> 



4. BlacH/h, variolous, with long fpinee* 

 Seba Muf 3. tab. 1 3, 7%. 5. 



5. Klein, echinod. ed. lesh tab. 46, /^«1* 



6. Spines black annulate with white, 

 Kn ; n e chined, ed le<k t> 101. 

 Inhibits find 1 ? of the Indian Ocean. 



Shell orSicu!ar, with a depreffed top, rich blue or grey-blue : 

 mouth brge: rvent circu'ar -\n\ furr lunoed with a pentangular 

 ikin : fpaces bifarioairv tuSercul xt •, the tubercles perforated at 

 the tip: avenues with \ p&r of pores at the bafe and 1 at the 

 tip.* /pines violet and blue-grey. 



StUmgrlus Sphaeroid, depreffed : avenues 5, with black porous margins, 



granulate in the middie with a double row of larger 



prominent dots. 

 Pall Spicil.Zool. IO p. 31, tab, e, fig 4—7. 

 Klein echinod. ed lesk. p 1 1 5. tab 4.-;, fig 1—4, 

 Inhabits the Indian W.* greenifh • hite. 

 Leffer tubercles with green v?ry brittle Sriftles: /pines refembling 



the ftem of the Equifetum, whitifh annulate with green and 



grey at the tip. 



Arantifior- Orbicular, grey, with purple-grey fpines thicker in the 

 pw. middle. 



Inhabits American Seas. Seba Muf. 3, tab. 13, fig t 6. 



Sttllatut, With the lower fpines capillary. 



Inhabits American Seas, Seba Muf 3, tab* 13, fig % j 



S z Radiat*:* 



