MOLLUSUA. 



j The Egg. b Egg broken, showing the youug animal, e Bulinus llo?mastoma of the natural size, c Young oua j J»l r ot>ra. d Young one, half-gi-civn 



Their food is the tender leaves of plants, and it devours eagerly lettuces and cabbages, when they can 

 be had. During the day, they lie in the shade serai-dormant, but move about towards evening, especially 

 if warm and moist, as they are evidently very fond of moisture They are hybernating animals, or torpid 

 during winter, and they deposit their eggs, in spring, about two inches below the earth's surface. 



We give cuts of three species of the Bulini, at various stages of their lii'e, from the egg upwards. 



The Midas's Ear of the shell collectors is a good specimen of the genus Auricula. It lives in the neigh- 

 borhood of rivers, lakes and morasses. 



Auricula Midse.or Midas's Ear 



Bulinus Rosaceus. a Adult animal, in motion, b A young 6hell. c Egg shell, just 



(370) 



