202 WORMS. TESTACEA. 59 . Cardium. 



/ -/,..., *£ U %% She11 fli g htl y heart-fhaped, with triangular ribs befct along 

 Xi h* i i 1 a ■' the "dges with thin fpines. fe 



Donovans Rritifn Shells, i. tab. $2.f. 2. 



Pennant Brit % Zcol. iv. tab. 50, /~. 39. 



Barbut, tab. 3./. 11. Lifter conch, tab. 325. 



GW/. /^, tab. 73. C. KnorrVergf? f \t.s,f. 5. 



C/k™. r0»r£. 6. /*£. 17,/. 171, 172.' 



Inhabits European Seas -, fize of a hazel nut, 



Shell thin, brittle, whitifh, with about 18 ribs: the grooves 

 tranfverfely wrinkled ; the ribs triangular and fpinous. 



QUatum, Shell flightly heart-maped \ with elevated fubtriangular ci- 

 liate grooves 



O. Fabr.jn Granl. p. 410, n. 41 1. 



Inhabits AW 6 Sea}, and very much refembles the laft, but has 

 32—38 nb> : full thick, oblique, convex, 19 lines broad, 18 

 long, urder the cUrticle cinereous or whitifh grey, within 

 white; groove* with undulate ftnas ; ribs ciliateon thr ridges, 

 the middle ones a little convex, the lateral ones triangular. 



^ Tubercular Shell fomewhat heart-fhaped, with ohtufe knotty tranf- 

 **»*- verfely ftriate grooves. 



Lifer conch, tab, 329. Rumpf. Mnf. t. 48, /. 1 1 . 



Bonan. recr et Muf. Kirch 2. fig. 100. 



Gualt. Teft. tab. 7 1 . M. Argenv. Zoom. tab. 6, C, D. 



Seba Muf 3. tab 86, fig 7. 



Knorr. Vergn. 5. tab. 30, f. 2, and 6. /. 8, /. J, 



Reoenf. conch 1. tab. 8, y?£. 23, 24. 



Chemn. conch. 6. /<?£. 17, fig 173. 



3. &£* M//; 3. /*£. 96, //^ 6. 



4. Seba Muf. 3. /*£. 86, /7f. 14. 



5. Knorr Vergn. 2. /a£. 29, /?£. 4, 



6. Knorr Vergn. 3. /#£. 4,//^. 5. 



Inhabits x\at Mediterranean: varioully coloured and marked, ge- 

 nerally brown with darker bands, or white with bro>\ n bands; 

 very convex and tranfverfely wrinkled, with about 20—23 

 ribs, which aje convex and fprinkied with a few knobs, 



liocardia. Shell heart-fhaped, with arched imbricate fcales alono- the 

 grooves. 

 Lifer, tab, 3Z3. Rumpf. Muf . tab. 48, /. 9. 

 Bonan. recr. 2. /. 95. Mnj. Kirch, f. 93. 

 Argenv. conch, tab. 23, M. Olear. Gott. t. 29, f. 3? 

 Regenf. conch. 1. tab. $, fig. 56. 

 Born. Muf. Caf.Vind. ted. p. 39/ «w£*. 



