Pacific Shores of North America. 85 



pentacta miniata. Brandt. 



Cladodactyla miniata, Brandt ; Prod. desc. anim. Mertens., 44. 



Hab. Sitka, (Mertens.) 



pent act a nigricans. Brandt. 



Cladodactyla nigricans, Brandt ; /. c. 44. 

 Hab. Sitka, (Mertens.) 



pentacta albida. Brandt. 



Cladodactyla albida, Brandt ; I. c. 44. 



Hab. Sitka, (Mertens.) 



cuvieria sitcilensis. Brandt. 



Cuvieria Sitchasnsis, Brandt ; I. c. 47. 



Hab. Sitka, (Mertens.) 



liosoma sitcelense. Brandt. 



Liosoma Sitchsense, Brandt ; /. c. 58. 



Hab. Sitka, (Mertens.) 



liosoma arenicola. Stimpson, n. s. 



Body thick fusiform ; skin coriaceous ; surface smooth 

 and glabrous, without suckers or processes of any kind. 

 Tentacles fifteen in number, very small, contracting into a 

 circular groove at the margin of the mouth, where they are 

 each concealed in a small cavity formed by folds of the 

 skin. Each tentacle is composed of a short peduncle with 

 four or five digitations at the disk-like summit ; these 

 branches being also minutely pinnate toward their extremi- 

 ties. Oral ring composed of five slender calcareous pieces, 



