\VORMS. MOLLUSCA. 3i. Echinus, 141 



135. A. sph&rulala. Body 5-lobed, glabrous above the 

 aperture; beneath 5-pointed, with a small globular 

 head between each ray : rays jointed, hirsute down 

 their sides. 



Anglesea. Erit. ZooL iv. tab. 32. fig. 63. 



136. A.varia. Body circular, entire, with TO alternate 

 broads r and narrower radiate stripes; the narrow-ones 

 with lozenge-shaped extremities : rays hirsute, annu- 

 late with red. 



Borl. Cornw. t. a^./. 21. Br. Zool iv. n. 65. 



137. A. aculeata. Body circular, entire, with 10 alter- 

 nate broader and narrower radiate stripes, all of them 

 simple at the ends, rays hirsute. 



Borl. Cornw. t. 25. /. 19. Br. Zool. iv. n. 66. 



J38. A.Jissa. Body circular, with 5 deep notches, and 

 5 pale radiate stripes : rays hirsute. 



Borl. Cornw. t. .25. /. 20. Br. Zool. iv. n. 68. 



139. A. hastata. Body somewhat pentangular, indented, 

 brownish-red with 10 alternate broader and narrower 

 ochraceous stripes, all broader at their extremities : 

 rays jointed, hirsute. 



Borl. Cornw. t. $/. 22. Br. Zool. iv. n. 67. 



140. A. nigra. Body pentangular, black, with 5 white 

 radiate stripes; rays hirsute, olive, tessellate with 

 deeper shades. 



Port. Cornw. t. 25, /. 23. Br. Zool. iv. . 69. 



141. A. pentaphylla. Body in 5 ovate lobes : rays hirsute 

 down the sides, tessellate above and below with greea 

 or blue. 



Borl. Cornw. t. 25. f. 24. Br. Zool. iv. n. 64. 



C. With more than 5 rays. 



142. A.papposa. Body with 12-14 lanceolate rays, sur- 

 rounded at the edges with short fascicular processes : 

 body muricate. 



JBarbut. t. to.f. 2. Shaw. Miscell t. 418. 



Body above ferruginous fpotted with \yhlte, the rays paler at the 

 ends : rays shorter than the body, with black grooves underneath. 



143. A. peclinata. With 10 pinnate filiform, rays, and as 

 many short simple ones underneath. 



Br. Zool. iv. t. 33. Barbut. t. lo.f, ti. 



Body fmall, red, coveredabove with 5 unequal valves : aperturtlt 

 e, one at the confluence of the valves, the other in the largest 

 valve : longer-rays with numerous short ramifications, furnished 

 beneath with hollow tubes, from which isjue fmall tranfparent 

 filiform flexible bodies; shorter-rays ending in an incurved claw. 



31. ECHINUS. Sea-egg. Sea Urchin. 



Obs. Such of this genus as have been hitherto found in a fossile 

 state. only, will be defcribed under the genus Helmintholithusi 

 among the petrifactions. 



A. Vent vertical. 

 114. Ech, esculentus. Nearly globular, with 10 porous su- 



