WORMS. MOLLUSCA. 52. Echinus- 15? 
Inhabits Mian Atlantic and European Seas. 
Shell wi:n a purplifh 10^ ■. /paces tuberculate m waved rows, th 
lower fide^iluddcd and divided by 2 iinooth fpaces : 
Ihorc thick mixed with long ones. 
c. Heart-foaped; the crown not grooved. 
^'‘■^latus. Avenues 4 ; with impreOed ftrite porous on each fide: crovyn 
■with 4 pores : fpaces 10, divided by a ferrate luture in 
the middle and arched tranfverfe futures. 
Klein, eehin. ed. Lcjk, p. 234 ‘ tab. zj; 
Walch Monum, dtlum.p. 1 8 2 . tab. E. iv. k, I, 2. 
Found hitherto only in a folHle ftate. , , . , 
Safe flat: mouth a little kidney-fliaped and furrounded with a 
fubpentagonal ftar of pores : roundifli, with 3 angles on 
ihe margin : aaserMts confifting of a row ot pores placed clofe 
together in pairs, each convergent on the crown. 
"’’purcus. Avenues 4, petal-fhaped, lanceolate: larger tubercles placed 
in a etig-zag manner: fpines acicuiar incurved 'W^hite. 
Klein echinod. ed, Lesie. tab. 43-^^’ 3 5' 5* 
Mull. Zcol. Dan. I./. 17. ». 4. tab. 6, 
Ar^cr.’ville Conch, p. 31 1 . tab. z^./ig- 3 * 
//:7A Animals, tab. 1 1 , Salt- Lorp. matf tab. \ t.fig. ]• 
Inhabits North Seas: above convex; the fides floping; forcr 
part with 2 projcflions, hind-part truncate; beneath flatj 
■ from the mouth to the vent a little convex and purple : very 
finely granulate and befet with fmall fubclavate briflles, and 
fpatulatc fpines ieated on w'hite tubercles : near the vent a 
kidney-fhaped flripe of minute white granulations and fur- 
rounded with numerous white tubercles. 
Oval with 5 avenues: vent remote. 
Mull. Zool. Dan. 3.p. ij.tab. o 
Inhabits the North Seas; very minute and dutinct 
lacunofus ; probably not of this divifion, 
from Ec^. 
^^'^plana. A little flattened each fide : fpaces and avenues 10, 2 of therp 
'^s. placed in the furrows ot the back. 
Klesn echinod. ed. Lesk.p. 238. tab. Sl-f'g- >> *• 
Lastg. lap. fig. tab, I’i-f 'gy >> a. 
SebeuX- liih. lielv. p. 84, 
Scheux. orySol. p. fig- OS' 
Breyn. eckin. p, 63. tab, 6. fig. t, 2. 
Bourg. petrif p. 76 . tab, ^\-fig- 33°‘ 353> 334’ 
Found in a foflile ftate: roundifti. 
