18 PROCEEDINGS OF THE NATIONAL MUSEUM VOL, 125 
Both species have been taken from floating seaweed, which suggests 
a possible means of dispersal. 
Idotea phosphorea Harger 
FiGuRE 3 
Locauities.—Gulf of Maine (Stations 1-3, 5, 6). Nantucket Sound 
and vicinity (Stations 11-14, 16-26). New York area (Station 27). 
Remarks.—Richardson (1905b) gives the distribution of Idotea 
phosphorea as “Coast of New England to Halifax, Nova Scotia, and 
the Gulf of St. Lawrence; Runmaré, Stockholms Skargérd,” at depths 
from the surface to 18 fathoms (about 33 meters), among seaweed, 
and in the stomach of haddock. In the present study, it was taken 
from 21 buoys from New York to the Gulf of Maine, all within its 
previously recorded range. 
Generally found within three meters of the surface, it also was 
taken at various depths down to about 23 meters. On one buoy (Sta- 
tion 23), more than 35 specimens were taken. This species was found 
on the greatest number of buoys in the entire collection. 
Idotea talthica (Pallas) 
FIGURE 3 
Locauities.—Gulf of Maine (Stations 4, 5). Nantucket Sound 
(Stations 10, 15, 18). 
Remarks.—The nomenclature of this widely distributed and 
doubtless variable species has had a controversial history. The name 
Idotea marina (L.) has appeared in the literature both as a junior 
and senior synonym of J. baltica (Pallas) (also spelled “‘balthica,” the 
original spelling of Pallas). Holthuis (1949) reviewed the case and 
concluded that J. marina was correct. He later (1956) reversed him- 
self, however, apparently persuaded by the arguments of Naylor 
(1955). Hurley (1961) transfers the New Zealand records of J. baltica 
to I. marina. Gruner (1965) uses J. balthica [sic] and lists among its 
synonyms J. marina of Richardson (1905b) and Holthuis (1949). He 
does not mention Hurley (1961) but says that the question of occur- 
rence of J. balthica [sic] in New Zealand (as well as Java, Brazil, and 
the Red Sea) must be reexamined. 
Richardson’s (1905b) list of localities (given below) for [dotea baltica 
(Pallas) is essentially similar to her earlier list (1901) for Z. marina 
(L.) in which the former was included among other synonyms. Both 
her lists incorporate the distributions given by Miers (1883), Harger 
(1873), and previous authors. Richardson’s (1905b) list is as follows: 
Atlantic coast from Nova Scotia and Gulf of St. Lawrence to North Carolina; 
Bermudas; Barbados; also Mediterranean, Black and Caspian seas; west coast 
of Europe to Great Britain; shores of the Netherlands; in German Ocean and 
