WORMS. MOLLUSCA. 52. Echinus. 
t$f 
Seba Mu/ 3. tab. 1 5, fig. 7, 8. 
Deiic, not. Jet 1 . 93 *ab. D. i./>g. » 7 * 
Inhabits thp Indian, Antrteau and South Jtas, and very much 
leftmbies the lalk: cinereous: erewn umbilicate: taje tt licil? 
hollowed, darker and marked with frondofe lines. 
g>r.a. 
Subpentagonal, with ovate avenues ; vent oval, more re- 
mote from the mouth, with 6 foramina clofe to th? 
margin. 
Klein echinod- ed. lesk. p. zoo. tab ^o. Jig. 5,6* 
Inhabits the ifland Bourbon i greenilh-brown. 
Shell a flightly heart lhaped oval, a little pulvinate, finuous, 4 
inches and 6 lines in tranfverfe diameter, crown patulous, 
bafe a little flatter, and marked with flexuous branched Iculp- 
tured lines. 
Margin waved, the lower-one roupded, the upper-one 
nearly fquare and twice divided, with an opening pore 
between every 2 of the avenues. 
Seba Muf. 3. tab. 15. fig. 1.2. 
Inhabits Ptrfian feast ycllowilh-grey, the upper margin tawny t 
the bafe flat, punftured and marked with radiate lirise; vent 
oblong and placed near the moutti. 
Subeordate and alTulate, the pieces hexagonal : avenues 5, 
oval, emarginate at the tip, the filth longer, and a p pre 
between every two of them. 
Rutnff. Amb. p. 37, tab. 14, F. 
2. SebaMufi. 3. tab. IJ, bg. 3 > +• 
Inhabits Amboma, in tl.e river IKa^nitoe-, 5 — 6 inches high and 
as many broad t the broader enil thrice divided j thin and 
thickly covered with granulations Ipinous at the bafe^ above 
reddilh-alh, beneath vtolet-red. 
*<tr. 
■ap,ru, 
Orbicular, lightly finuous, and peiforated each fidp with 4 
foramina: vent circular. 
Seba Mu/'. 3- tab. 15, fig. 5.6. 
Inhabits——: pale yellow-grey: foovs with 5 foramina t 
obtufe at the tip: the ha/e funoweo with 10 flcxuoua 
grooves bifid at the tips; mouth rounded and 5- toothed. 
tt With a fmuate margin and entire Jurf ace. 
^Sanutn, Avenues oval, finely ftriate and clclt at the tip : Cfowrs 
prominent : vent circular and near the margin. 
Kletn eehin. ed, Usk. p, 204, tub. z%, /ig, a, b, C. 
