BIOLOGICAL SURVEY OF WOODS HOLE AND VICINITY. 
659 
Family Spii/IvROmid/E. 
Sphosroma quadridentata Say. 
Verrill and Smith (Harger), 1873, p. 569, 315; 
Harger, 1879, p. 161 (S. quadridentatum ); 1880, 
p. 368 (S. quadridentatum ); Richardson, 1901, 
p. 533; 1905, p. 281; M. J. Rathbun, 1905, p. 
39 - 
Vineyard Sound, along the shores, under stones, 
and among algae. — Harger. Beach near Fort 
Phoenix, under stones and on peat bank be- 
tween tides. (Collected by Cole, identified by 
Osbum.) 
Family Idothbid^ 
Chiridotea cceca (Say). 
Verrill and Smith (Harger), 1873, p. 569, 340, 
etc. ( Idotea caeca)-, Harger, 1879, p. 159; 1880, 
p. 338; Richardson, 1901, p. 539; 1905, p. 353; 
M. J. Rathbun, 1905, p. 40. 
Vineyard Sound, occurring on moist sand flats 
and burrowing like moles beneath the surface 
of the sand, raising it up into little ridges as 
they go along. — Harger. Woods Hole, Tar- 
paulin Cove. — Richardson. Ivatama Bay, 
Lagoon Pond, Muskeget, abundant at low 
water. — Osbum. West Falmouth Harbor. — 
Cole. Phalaropc station 34 (Sound shore of 
Cuttyhunk): 1 adult.* Also recorded from a 
muddy beach and taken by Mr. Edwards in 
surface tow. 
About 40 specimens of this isopod were taken by 
Mr. Edwards from the stomach of a flounder, 
and one from the stomach of a puffer. 
? Chiridotea tuftsii (Stimpson). 
Verrill and Smith (Harger), 1873, p. 569 ( Idotea 
Tuftsii)', Harger, 1879, p. 159; 1880, p. 340; 
Richardson, 1901, p. 539; 1905, p. 354; M. J. 
Rathbun, 1905, p. 40. 
No local records, although this region lies within 
the known range of the species. 
Idothea metallica Bose. 
Verrill and Smith (Harger), 1873, p. 569, 439 
( Idotea robusta ); Harger, 1879, p. 160; ( Idotea 
robusta); 1880, p. 349 ( Idotea robusta)-, Bumpus, 
1898b ( Idotea robusta)-, Richardson, 1901, p. 
541; 1905, p. 362; M. J. Rathbun, 1905, p. 41. 
Taken very frequently in Vineyard Sound, either 
swimming freely or clinging to eelgrass or gulf- 
weed. 
Fish Hawk stations (probably coming from sur- 
face)*: 7699 (1), 7703 (1), 7735. 
Phalarope stations (likewise probably from sur- 
face)*: 2,104. 
Idothea metallica — Continued. 
Bumpus records the occurrence of specimens 
with eggs July 17 and August 12. Osbum re- 
ports that on July 6 (1904) a few females carry- 
ing eggs or young in the brood pouch were 
taken; great numbers of young about 5 milli- 
meters long and some older ones were likewise 
found upon the gulfweed. 
Idothea baltica (Pallas). [Chart 104.] 
Verrill and Smith (Harger), 1873, p. 569, 316, 
etc. ( Idotea irrorata)-, Harger, 1879, p. 160 
(. Idotea irrorata); 1880, p. 343 ( Idotea irrorata); 
Richardson, 1901, p. 540 {Idotea marina); 1905, 
p. 364; M. J. Rathbun, 1905, p. 40 ( Idothea 
marina). 
Of practically universal distribution locally, 
along shores, and on the surface, among eel- 
grass, rockweed, and sargassum; sometimes 
taken in great numbers. Occasionally brought 
up in the dredge while operating at depths as 
great as 13 X fathoms; in these cases perhaps 
they were actually taken near the surface. 
Fish Hawk stations: 7524 bis (2), 7525 (1), 7557 
(1). 77 H W> 7734 - 
Phalarope and Blue Wing stations: 33 (1 adult), 
44 (few), 45 (few), 47 (several), 49 (1), 51 (many 
in algas), 104. 
Osburn records that on July 9, the larger females 
all seemed to have released their young ; only 
the smaller females were still found bearing 
eggs or young. On July 5, specimens 5 to 8 
mm. long were taken. 
A specimen 10 mm. long was taken by C. B. Wil- 
son from the gillsof a sand shark. Its presence 
here was, however, probably accidental. 
Idothea phosphorea Harger. [Chart 105.] 
Verrill and Smith (Harger), 1873, p. 569, 316, etc. 
{Idotea phosphorea, sp. nov.); Harger, 1880, p. 
347; Richardson, 1901, p. 541; 1905, p. 367; 
M. J. Rathbun, 1905, p. 41. 
Abundant and generally distributed throughout 
Vineyard Sound, though much more prevalent 
in the western half; in Buzzards Bay only re- 
corded from a few stations near the mouth. — 
Survey. Dredged in 1 to 17 fathoms, on bot- 
toms of sand, gravel and stones (rarely mud). 
Taken, also, along shore among weeds; likewise 
at surface, and on bottom at various depths; 
recorded by Dr. Osbum from gulfweed. 
Fish Hawk stations: 7536 bis, 7531 bis, 7552 bis 
(1). 7 SS 3 bis (*)> 7557 (*)> 75 6 ° ( 0 > 75 6 3 bis C 1 ). 
7564 bis, 7382 (1), 7583 (1), 7672 (1), 7685 (7), 
7698 (2), 7699 (1 adult and many young), 7700 
(x young), 7701 (several), 7702 (2), 7703 (2), 
