WORMS. TESTACBA. 5 6. Mya. 



*77 



Shell ftriate, the valves with 2 fubfpinous riflges : lunge 



without teeth. 

 O. Fabr.jn' Grcznl. /« 407. n. 408. 

 Inhabits the Ncrth Seas, among algse } if — 7 lines long: fize 



of a bean, pale yellow and milk-white within ; r fembles an. 



Area: anteriorly impreffed and a little flattim; the fore-part 



very obtufe, the hind-part fhorter and fharpiih. 



hine< 



Shell oval, equivalve, widely gaping and flrlate: 

 without teeth. 



Pall. It. 2. p, 700. k . 



Inhabits fandy fhbres of the Cafpian Sea, ; about an inch lofcg J 

 Jhell thin, a little antiquated, white, with about 33 ftrisein each 

 valve, which are diftant at the (horter end and more crowded 

 in the broader : hinge with a thiekifh inflected lip. 



Shell equivalve, pellucid, very finely ftriate tranfverfely, 

 yellow ifh-green with livid rays: valves very broad on 

 one fide and very narrow on the other. 

 Chemn. conch. 6. tab. 2. fig, 7, 



2. Brownifh with blue radiate lines. 

 Lifter conch, tab. 152. fig. 7. 



Inhabits rivers of Malabar, thinner and more fragile than M. 

 pictorum, broader and more flat ; inlide clay-coiour : primary- 

 tooth of the hinge crenare. 



Ovate-oblong; one valve with a broad ftrong tooth let into 

 a hollow of the other valve, and a letter tooth inferted 

 between 2 fm'all ones of the oppofite valve. 



Chemn conch. 6. tab 2. fig. iz. 



Inhabits — . Shell if inch long, 3 inches brosd, and is more 



ventricofe than rVladra lutraria : refemble's M. arenaria, of 



which it is perhaps only a variety-. 



inatinao Shell globular, fnowy, peilucia : primary tooth of the hinge 

 prominent and rcunded. 

 Ad an/on Senegal, tab. 19, fig* 2. f 



Chemn. couch. 6, tab. 2. fig, 13, /jj . / j"* /w 

 Inhabits Guinea, and referable > the Solen anatinus. 

 Shell with deculfate ftrise : each valve repand on one fide. 



lartca, Shell equivalve, fnowy, ovate-oblong, with decufTate tfria? : 

 tooth of the hinge (ingle, broad, perpendicular and 



fpoon-fhaped. 

 Chean. conch* 6. tab* 3. jfy. 17, 18. 



VOL. if <-& 



Inhabit^ 



