212 WORMS. TESTACEA. 6o. Ma^ra. 
Sie/l mvch produced on one fide, and gaping at both 
releinbles a Myaj dirty white or yellowilh tinged with oranS' 
and irregularly clouded with brown: iinge with a Tmal' 
large triangular cavity in one valve, and a ftmilar cavity 
an elevated triangular tooth in the other. 
Shell fnowy thick 3-fided, very finely firiate tranfverftl/' 
the fore.part fiattiih and fiightly wrinkled : behind th' 
beaks a broad heart-lhaped thinly Itriate impieilion- 
Chemn, com. 6. tal, 2\,f(g. 207, 
Inhabits an inch long and rather more broad. 
Maculata. Shell obtufely triangular fmooth thin, with pd'ucid clicfi’^'* 
fpots, within white and very finely ftriate : behiitd 
beaks a heart-lhaped imprellioii.. ' 
Chemn. com. 6. tab. z\.fig.. 208. 
Inhabits India ; about 1 i inch long and rather broader. 
lurgida. Shell inflated, faintly ftriate, ochraceous and white with*?'' 
beaks diftant purplilh : hinge with a fupsrnumei'^’^J^ 
triangular double tooth. 
Chemn. com. 6 . tab. 2 1 .fig. 210, 2 1 1 . 
Inhabits Tramuebar : 2 | inches long, 3 ' broad ; thin fubpd' 
lucid, finely ftriate and wrinkled before and behind. 
Violacea. Shell thin, obfoletcly radiate, finely ftriate tranfverfely = 
rnargins each fide the' beaks whitifli : hinge wiih * 
fiipcrnumerary double triangular tooth, 
Qhemn cone. 6, tab. zz. fig. 213, 214. ■ 
Knorr Vergn. 6 , tab. $.fiig. z? ^ 
Inhabiis f'rafifiebar: about 2 inches long and 3 broad. 
thin bri tic gaping here and there, anterior margin oblor-S 
elevated wrinkled. 
Cuneafa. Shell wedge-ftiaped blue finely ftriate tranfverfely, the 
gin crcntiiaie within. 
Uoemn. cone. 6. tab. 2Z. Jig. 213. 
inliabiu lefeinblts the laif, but is only an inch long 
hardly as much broad: lomctinies white,. 
Glauca. Shell ovate, dirty white with glacoiis rays, very finely 
ate trail (Verl'ely, the anterior part wrinkled. 
Born MuJ. Cas. Find. test. tab. 3. 1 1, 12, 
Chemn. cone. b. tab. z^. Jig. z-^Z,ZT,'^. 
Inhabits die Mrduerraman -. 2 £ inches long, 3 broad: bi^^' 
j turned backwards, with a narrow gape bctweeiL them. 
