WORMS. TESTACEA. 68. Mytilus. 299 



Martin Bejch. Natter/, 2. tab. 12. fig. 1. 

 2. Martynunivers. Conch 2. tab, jj. 



Inhabits the Indian and Southern Ocean, adhering to corals and 

 marine Jubilances. 



Stagnalis. Shell oval flattifh and tranfverfeiy ribbed. 

 Schrat. Flu/conch, tab. 1 . fig. I . 



Found in the lake Schwanjea, reiembles M. cygneus, but is as 

 much as 8 inches broad and 4^ 1 mg, and is lefs convex : fncll 

 greenifh with darker rays and ydiowiih -brown at the margin. 



elknfu. Shell oval convex, rounded behind, elongated and cbtufely 

 pointed before: beaks obfoiete. 

 Scbrtzt. Fiufconch, tab. Z. fig. I. 



Inhabits ftagnant waters of Germany ; refembles M. cygneus but 

 is 7 inches broad and 3 long; greenim-yellow. 



ojeuu Shell fuborbicular with 15 triangular crefted grooves and 

 alternate triangular teeth. 

 Inhabits Africa. Adam Seneg- 1. tab. \\.fg. 4. 

 Shell rofy, within white, purple at the margin 5 3 inches broad 

 and a little fhorter : probaoly not of this genus. 



Pitnicsw. Shell gibbous pointed, with 15 grooves: margin toothed. 

 Inhabits Africa. Adanf Seneg. l tab. 15. fig 2. 

 Shell 14 lines long and about half as Droad j under the fulvous 



skin violet or fcarlet, fometimes mixed with brown and green: 



hinge with 4 very minute teeth. 



Niger* Shell flat thin with very fine grooves, covered with a black 



fkin under which it is milky and rinety poliihed. 

 Inhabits Africa. Adanf. Seneg. 1. tab. I'y.fg- 3. 

 Shell very thin, about an inch and a half long, with about 100 

 grooves : hinge with 1 or 2 minute teeth. 



Lavigatus* Shell flat fmooth covered with a thick fulvous fkin , under 

 which it is rofy. 

 Inna its Africa % Adans.faneg. 1. tab. i$-fzg. 4. 

 Srjsll 2 \ inches long and about half as wide •. within perlaceous; 

 the skin fometimes with a greenifh mixture.' hinge with 2-T3 

 teeth. 



Dubius* Shell tranfverfeiy wrinkled, obtufe at each end, fulvous, 

 within margaritaceous : beaks obfoiete : hinge without 

 teeth. ' 



Ad. ms feveg. l-,tab. 17. fig. 2 1. 



Inhabits frefh waters of Senegal ; 5 inches broad, 2 long* 



P P 2 ; ,.„.;,. Voly- 



r-. 



