of the Pacific Shores of North America. 9029 
PENTACTA MINIATA. Brandt. 
Cladodactyla miniata, BRAND T ; Prod. desc. anim. Mertens., 44. 
Hab. Sitka, (Mertens.) 
PENTACTA NIGRICANS. Brandt. 
Cladodactyla nigricans, BRANDT ; l. c. 44. 
Hab. Sitka, (Mertens.) 
PENTACTA ALBIDA. Brandt. 
Cladodactyla albida, BRANDT ; l. c. 44. 
Hab. Sitka, (Mertens.) 
CUVIERIA SITCHENSIS. Brandt. 
Cuvieria Sitchensis, BRANDT ; l. c. 47. 
Hab. Sitka, (Mertens.) 
LIOSOMA SITCHJENSE. Brandt. 
Liosoma Sitchense, BRANDT ; L. 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 
“teular groove at the margin of the mouth, where they are 
“ach concealed in a small cavity formed by folds of the 
“in. Each tentacle is composed of a short peduncle with 
four or five digitations at the disk-like summit; these 
Ee being also minutely pinnate toward their extremi- 
T Oralring composed of five slender calcareous pieces, 
