140 WORMS. MOLLUSCA, 52. Echinus. 
Radiatus. With 5 radiate avenues, forked at the tip. 
Lesk. ap. Klein. ecbin. p.116, tab. 44, fig. 1. 
Seba Muf.3, tab. 14, fig 1,2. 
Inhabits Each of the avenus is terminated by z whitifh 
says, and perforated with pale red foramina. 
Circinatus. With 10 granulate fpaces, bifarioufly tuberculate; the - 
larger ones excavated, the leffer ones elevated, and 
fubpulvinate at the bafe. : 
Klein echin. ed. leske, p. 119, tab. 45, figs 10. 
Scill. corp. mar. tab. 25, f. 1? 
Found hitherto only in a foffile ftate. 
Cidaris. — Hemifphzrical, deprefled, with 5 flexuouslinear avenues, 
the {paces alternately bifarious. 
Klein echin. ed. lesk. p. 125. tab. 7. Barbut, tab. Y1, fr 4. 
1. Klein ek. tab. 7, A. tad. 39, f. 1, 2. tab. §1; fih, 152. 
Seba Muf. 3. p.30, tab. 13, fig. 11, 12. | 
Delic. Nat. fel. tab. D, fig 2. 
Phef. Zee-egel p. 29, tab. 3, fig. 10. 
2, Lefs, Klein, ed. lesk. 5.127. tab, 7. 
Rumpf. Amb. p. 53, tab. 12, ig. 3, 4. 
Seba Mif. 3, 180.3.  Argerv. Conch, tab. 25. E. 
Delic, nat, jel. tab. D. ii. fig. 5. 
- 3+ Spines fufiform, Seba Muf. 3. tab. 13, fig. 8. 
Klein ed. lesk. tab. 41. fig. 4. tab. 7. D, E. 
Scil. corp. mar. tab. 22. fig. 13—3. 
Bonann. Muf. p. 92. fig. 17,18. 
Gualt, te. tab. 108. fig. D, E..— Petiv- mb. tab. 7, f. 2, 
4. Spines claviculate. De duc. Naturf. 8. tab. 8. 
Klein. ed. lesk. p. 134. tab. 46. fig. 2, 3... 
Lang. Lap. fg. tab. 36. the middle figure, 
$. Spies gbtulfe. Mull. Zoo. Dan. prodr. 2848, 
6. Echini Siamenfes. — Rumpf. Amb. p. 34. 
Inhabits the Ocean, generally of a livid-grey colour and flat at 
the bafe: ./pares granulate; with 2 rows of protuberances 
placed alternately, furnifhed with perforated papille, fur- 
rounded with a circle or two of granulations, and feparated by 
a groove running round them; in the place of. lefier oncs 1s 
an eminentrband between the avenues; mouth rather large, 
Mamillarus Hemifpherical, oval, with ro winding avenues ; the fpaces 
muricate and warty, the narrower ones abbieviated. 
Klein ecbinody ea. lesk. tab. 6, 34, 99. fic. 1. 
fenmpf. Ant. p. 32. tabs 154. Figs 3, 29, 
Sig 
