WORMS. TESTACEA. 68. MytiluS. 



297 



Ch'emn. conch, 8. tab. 84. fig. 7 $3* 



Inhabits Shell minute, yellowifh with a mixture of green, 



within a little filvery, 



'tab*. Shell oval rufous flriate* with a crenulate margin* 



Cbemtit conch. 8. tab. %$>fig. 761. 



inhabits the feas of Greenland* affixed to rocks by a bronzed 

 byflus or beard, and is the food ot the Anas hyemalis and hif- 

 trionica * Jhell inflated femipellucid fmooth, covered with a 

 brown skin under which it is white and rnargaritaceous 

 within. 



Flteviatilis. Shell thin flight Jy wedged, 1 wifhiri reddifh : beaks recurved 

 and large. 

 , Lster conch , tab *$J.f?g* 12. 



Inhabits frefh waters of Europe j refembles M. anatinus, and is 

 probably not a diftinft fpecies. 



iujm. 



Mamma^ 



nus. 



Perfcus. 



PiclusX 



Safciata 



fndalus. 



Shell oblong narrow with very fine tranfverfe flriae : one 

 fide emarginate, the other rounded; beaks prominent 

 curved. 



hitter conch, tab. ^^ty.fig. JQ". 

 Inhabits Shell minute brown. 



Shell broad fhort and rounded behind : beaks conic protu- 

 berant. 

 Inhabits Lijier conch, tab. $61 .fig. 199. b. 



Klein Oftr. tab, 9. jig* 27. p, 129. 



Shell broad and covered with a rough rugged yellow coat,' 



within milky. 

 Bonan. recr. and Muf. kirch. 2. fig, 1 7. 

 Inhabits the Per ftan Sea; thrice as broad as it is longr 



Shell broad very fmooth, flammeous or rofe- colour with 

 white bands ; beaks obtufe, 

 Bonan^ recr, 2. fig. 35. Muf Kirch. 2. fig. 34* 

 Inhabits Portugal', thrice as broad as it is long. 



Shell pellucid mining, blueifh with a claret-colour and pale 

 red band. 

 Bonan, recr \ 3. fig. 352. Muf. Kirch. Z.J. 106. 

 Inh^blisr Brajf/f twice as broad as it is long. 



Shell broad and rounded at both ends, claret-colour -with 

 undulate blueifh and greeniih itriae: margin ferrate. 

 Inhabits the Portuguefe Sea ; longer than M. pictus, 



YOL. SVe—P p Pttri 



