PLATE LXXXVII. 



"Helix vivipara, viviparous. Perm. Br. Zool. No, 132. tab. 84. 



Jig. 132. 

 Cochlea fusco viridescens trifasciata. Vivipara. Da Costa. Br. 

 Conch, p. 81. sp. 44. 



This kind is found in abundance in all rivers and stagnant waters. 

 The river kind seems to vary in some respects from the other ; the 

 shells are more opake, and the colours are brighter than in those 

 which inhabit the stagnant water. 



The animal has a head not unlike that of a Bull, from which cir- 

 cumstance the Swedes, according to Linnaeus, call it the Bull-head, 

 and some French authors, limacon a tete de baeiif t for the same 

 reason. It feeds on Duck Weed. 



