US Exploring LEmpedition . 
MOLLUSCA» Pl do 
rubiginosa G. i ac Helix hystrix Migheis. c Haz Cressida d. 
obolus G. ; e! EE lo Æ c. ae E: 
dædala G. 7 B DE LIC A trochitormis Per. 
bursatella = G. LL Wer. E. So wa 
Tams å. 
Drawn by T Drayton 5 TH Arnold Sc. 
Y Dougal . 
