WORMS. MOLLUSCA. 52. Echinus. 143 



Ivnneui. Hemifphaerical depreffed ; the fpaces void of tubercles ir* 

 the middle towards the upper parts, the leifer ones. 

 more elevated : avenues narrow and bounded each Ji<de 

 by a row of tubercles. 

 Klein, echinod. ed* Lesk. p. 148, tab. 10, A. 



Inhabits O.ive green, the tubercles and bafe of the ave- 

 nues whiter: larger fpaces with 12 rows of tub rcles at the 

 broadefl part, lefler fpaces with 3, each tubercle furrounded 

 with a circle of lefTer ones: avenues hardly 2 lines broad, with 

 3 pair of pores intermixed with granulations ; mouth fraalf s 

 event furrouded with pentangular fcalcs. 



Variegatut. Orbicular fubangular; middle fpaces rofy, rich green each 



i\de: avenues whitifh- green : bafe whhifh. 

 Klein, echinod. ed. Lesk. p. 149. tab. 10. B, C. 

 Seba Muf 3. tab. 10 fig. 13. Gualt. ted, t. lOJ-f F. 

 Inhabits Larger fpaces with the appearance of 3-4 warts fuF- 



rounded with granulations, teller (paces a l?ttle elevated wifrt. 



3 rows of warts : avenues with 3 pair of pores : mouth roundifj?. 



and very faintly finuate. 



Pujluhjus. larger fpaces divided in the middle by a future, witli 

 numerous tranfverfe rows of tubercles increasing irj 

 number towards the middle; lefTer fpaces more elevated, 



Klein echinod. ed. l,e$ke. p. 1 50. tab 1 1 . A, B, C, D. 



Seba Muf. 3. tab. 10 fig. 8. 10. 15. 



Inhabits— j — -;>ardly an inch high and about 2 in diameter^ 

 brownifh grey inclining so red, the leifer fpaces pajer, the 

 bafe whiufh, and the protuberances reddifh : fpaces 10, the 

 larger ones with a rough diik, the future bounded by minute, 

 granulations each fide, with rows of tubercles confifting at firft 

 of one, then of 2, fo that in tr.e middle tney amount to about 

 10 j lefTer fpace with 2 rows of tubercles with a ferrate Hrje 

 and minute granulations between them ; a-ve-ues with 4-T-5 

 pair of pores running into oblique lines : mouth with broad 

 finuoiit'.es. 



Sranulatus Suborbicular fubangular: middle of the fpaces naked an4 

 divided by a future ferrate each fide, the larger pne§ 

 with 7 rows of tubercles, the leifer ones wjth 4. 

 Klein echinod. ed Lsske. p. 150 tab. i l , E, F. 



Inhabits -about | of an inch high and 1 | in diameter, th§ 



bafe pulvinate and with the margin of the larger fpaces greeniihr 

 grey, middle of the larger (pace, and the leffer ones dull green; 

 avenues with 3 pair of pores placed in a triangle : vent cir- 

 cular with 10 fcales at the margin expanded ltke a rofe, 



