EXPLANATION OF PLAT E VI 

 Individual specimens from a series of local races 

 of Thais lamellosa . 



Top row,- Turn Reef, San Juan Islands; Orchard 

 Rocks, Kitsap Co., Puget Sound; Allyn, Case 

 Inlet, Puget Sound. 



Second row;- McLean's Arm, Prince of Wales 

 Island, Alaska; Vashon Island, Puget Sound; 

 Prevost Harbor, San Juan Islands. 

 Third row,- Knob Island, San Juan Islands; 

 Kuiu Island, Alaska; Oakland Bay, Puget Sd.; 

 Willapa Bay, Washington. 



Fourth row,- Blakeley Island, San Juan Islands; 

 Allison Harbor, B. C; Canoe Bay, Vancouver 

 Island, B. C. 



