'5 

 *2. Trachydermon albus L. 



II. A. PlLSBRY. Man. XIV, Pag. 70. 

 Nord Pacifik. 



*3> Trachydermon lividus Midd. 



H. A. PlLSBRY. Man. XIV, Pag. 76. 

 Sitka. 



*4. Trachydermon dentiens Gld. 



H. A. Pilsbry. Man. XIV, Pag. 7$. 

 Puget Sound, Californien. 



*5. Trachydermon gothicus Carp. 



H. A. Pilsbry. Man. XIV, Pag. 74. 

 Insel Catalina, Californien. 



*6. Tracliydermoii jiectens Carp. 



H. A. Pilsbry. Man. XIV, Pag. 75; XV, Pag. 64. 

 Puget Sound, Britisch Columbia ; San Pedro. 



*j. Trachydermon scrobiculatus Midd. 

 H. A. Pilsbry. Man. XIV, Pag. j6. 

 Californien. 



*8. Trachydermon stramiueus Sow. 

 H. A. Pilsbry. Man. XIV, Pag. 79. 

 Insel Chiloë. 



*g. Trachydermon pusillus Sow. 



H. A. Pilsbry. Man. XIV, Pag. 80. 

 Pascamayo, Peru. 



2. Subsrenus Boreoclüton Sars. 



O 



*io. Trachydermon ruber L. 



H. A. Pilsbry. Man. XIV, Pag. So. 

 Nord Pacifik. 



