130 WORMS. MOLLUSCA. 52. Echinüs: 
Thefe sre all inhabitants of the Sea, and many of them have 
been hitherto found 1n a foffile ftatc : many are cículent, and 
they are in general armed with 5 fharp teeth: the pores are 
each furnifhed with a retractile scahicntea or feeler, by which 
the animal affixes irfelf to any object and ftops its motion: 
the {pines are connected to the outer fkin by vety ftrong 
ligaments, and are the inftryments of motion. 
A. Vent vertical: tentacula every where Simple. 
a. Hemifpherical ar globular. 
8 E culentus Subglobular; with ro aveétiues of pores, the {paces between 
.. covered with fimall tubercles fupporting the fpines. 
Nasur, Miftell. tab. 223. Barbut. tab, iv. fig. 1. 
Lifter Angl. 69. tab. 3: fig 13. Brit. Zool. iv. t. 34. fi 74% 
Klein ecbinod. ed. Left. p. 76. tab. 38. f. 1, 
Rum pf Muf. 31. tab. 15. fig. B, C. 
Seba Muf. 3. tad. 11. fig. 4. a, b. £t. 12. f: 1, 6, 8,9. 
Argenv. Conch, p. 507. tab. 25. fig. F. 
Delic. Nat. fel. tab. D. fig. 1. t. D. ii. f. 1, 
t. Seba Muf. 3. tab. 10. fig. 14. 
» Seba. IVuf. 3. tab. 11. fig. 6, 
. Seba Muf. 5, tab. 11. fige 7. 
4 Seba. Muf, 3. tab. 11, fig. g- 
$. White. Molin. Hifi. Chili. p. 175. 
Inhabits European and Indian Seas. . 
Body reddifh or yellowifh: /pines fhort violet colour, loofing thei 
colour and falling off the dead animal: pores in about 3 rows: 
tubercles furrounded with a circle of leffer ones: went clofed b$ 
a coriaceous membrane covered with fpines. 
t4. 
o3. 
S&hera, ^ Subfphzrical, red, with blueih fpines. 
Inhabits Northern Seas. —. Mull, Zool. Dan. predr. 2845, 
Is probably the fame as the latt, or Bch, fardicus, 
Drebacbi- Hetnifphzrical, pale, with long pale fpines. 
&nfis. Inhabits North Seas. Mull, Zool. Dan. prodr. 2846. 
$ Mitaris. Hemifpherical depreffed, with fo auénues of pores; the 
fpaces between with 2 rows of protuberances. 
Klein. Echin. ed. Left. tab. 2. A,C, D. tab 31. A, D. 
Sloan Jamaica. 2. p. 268. tab. 244. fig. 1793. 
Seba Muf. 3. p. Y8. tab. 10. fig..A—4. tab. 11. fig. 5—8, 
Dei. Nat. 1, tab. D. ii. fig. 3, 4» 5. tab. D, ili. fig. 4. 
Cualt, 16/1, tab, 107. fg. G, H, IL L, K. 
Baferi- 
