2 o 6 WORMS. TtSTACEA. 59. Cardium. 
Ij 
Inhabits the Meditirranean : white, with dillant flri® 
upwards; the cavity under the beaks yellow; behind ' 
beaks an ovate gape, margins prominent, 
tdirgineum. Shell triangular-rounded, equilateral, with tranfverfe 
branaceo-recurved wrinkles; hinges blue. . 
Inhabits the Mediterranean, and appro.rches to the Genus ^ 
in the lateral teeth of the hinge; elegantly banded, cov'S^* 
with a glaucous cuticle, and white within. 
i. Chemn, conch. 6 , tab. l8, yi iSu 
Gronov. Zoapb. tab. i8, /. 5, 
Inhabits //jay,! and .//wrnVa; ihell thin, brittle, longitudio’ ^ 
f.riate, purple on the anterior margin and red at the beak®' 
Ttilattrum Shell triangular, gibbous, ftriate. 
Inhabits tne Cafpian lea : a very indillinfl fpecies. 
I 
Auruula. Shell heart- lhaped, fubrhombic, with 24 ribs each 
the grooves very finely crenulate ; beaks diftant. 
Inhabits Arabia and Egypt, Rcgerf. conch. 2. tah. g. 1 
5 W/ white, pellucid, inches long, i-J broad; margin of I 
back revolute, toothed. 
Tri/lt, Shell oval, fmooth, the margins each fide the beaks ftri*^'. 
Inhabits . Shell Imooth, cinereous, radiate with vvhi*^' | 
beaks reflefled. 
Monjirofum. Shell gibbous, one fide imprefled and ochraceous, the | 
, convex, heart- lhaped and whitilh fpotted with yello"^’ 
the valves with toothed ridges. 
Chemn. conch, a. tab, 14, ftg. 149, I 50, 
Inhabits Nicobar IJlands : a very rare fpecies. 
Limet. Shell gibbous with prickly ribs, the anterior ones with 
curved membranaceous tubercles crenate at the 1“**^*' 
the intermediate grooves granulate. 
Chemn. conch. 6. tab. to,, fig. 153, 154. 
Z, Shrest. Einl. in conch, z. tab, 7, fig. 13, a, b.- 
Inhabits Nicobar IJlands: ochraceous, the anterior margin 
colour, beaks reddilh : 2) ribs more rounded, not pdoi*' 
but granulate. 
Ringens. Shell rounded, ventrlcofe, white, with deep teeth on 
margin, the anterior ones rofy. 
Lifter, tab, 330, Adaif.Seneg. tab. \%, fig. 1, 
