20 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 125 
1936; Dow and Menzies, 1957; Naylor, 1957; Nordenstam, 1933; 
Thielemann, 1910; Hurley, 1961; Menzies, 1962; Hansen, 1916). 
Reported depths for Jdotea metallica are from the surface to 91 
fathoms (166 meters). It has been found on floating fucus. Dow and 
Menzies (1957) report this species (forma typica Cardusu) as com- 
monly taken in surface plankton tows in the Mediterranean. Their 
analysis of stomach contents indicates its food consists principally 
of brown algae, possibly Sargassum. They conclude that this form is a 
pelagic surface-dwelling isopod. Their conclusion is supported by the 
present study as all specimens of this species were taken at the surface 
level on four buoys set in open and relatively deep water (59-76 
meters) at some distance (50-100 or more kilometers) east of Long 
Island and south of Massachusetts. 
Idotea (Pentidotea) resecata (Stimpson) Menzies 
FiGurE 3 
Locauities.—California: Anacapa Island (Station 67), Santa Barbara 
(Station 69), San Simeon (Station 73). 
Remarks.—ldotea resecata ranges from southern California to 
Alaska (Richardson, 1905b; Hatch, 1947; Menzies, 1959) with many 
localities reported along the coasts of California (San Pedro to 
Humboldt Bay), Washington, and British Columbia. The author has 
collected specimens of this species at Los Coronados Islands off San 
Diego, a locality that extends its known range considerably southward. 
According to Richardson (1905b), it is found between tide marks 
among rocks, seaweed, kelp, eelgrass, etc. at depths from surface to 
3.5 fathoms (about 6.4 meters). Dow and Menzies (1959), however, 
consider it as the Pacific Ocean counterpart of Zdotea metallica, a truly 
pelagic species. 
The buoy collections of Jdotea resecata were well within its recorded 
range of distribution, which extends several thousand miles along the 
Pacific coast of North America from subtropical to boreal waters. 
This species apparently has a wide temperature tolerance. 
Idotea (Pentidotea) wosnesenskii (Brandt) Menzies 
FIGURE 3 
Locauities.—California: San Francisco Bay area (inside the bay: 
Stations 75, 81, 84; outside: Stations 88, 89). Washington: Strait of 
Juan de Fuca (Station 93), Puget Sound (Station 94), outer coast at 
Quillayute (Station 96). 
Remarxks.—Idotea wosnesenskii is common in temperate and cold 
waters along the entire Pacific coast of North America from central 
California to Alaska and in the Bering Sea, Sea of Ochotsk, and 
Kamchatka Sea (Richardson, 1905b; Thielemann, 1910; Gurjanova, 
