BIOLOGICAL SURVEY OF WOODS HOLE AND VICINITY. 



659 



Family 



Spkceroma 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 

 Osburn.) 



Family IDOTHEID^E 



Ckiridotea cazca (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. Katama Bay, 

 Lagoon Pond, Muskeget, abundant at low 

 water. Osburn. West Falmouth Harbor. 

 Cole. Phalarope station 34 (Sound shore of 

 Cuttyhunk): i 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 Bosc. 



Verrill and Smith (Harger), 1873, p. 565, 439 



(Idotea robusta); Harger, 1879, p. 160; (Idotea 



robusta); 1880, p. 349 (Idotea robusta); Bumpus, 



iSgSb (Idotea robusla); 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 (i), 7703 (i), 7735. 

 Phalarope stations (likewise probably from sur- 



face)*: 2,104. 



Idothea metallica Continued. 



Eumpus records the occurrence of specimens 

 with eggs July 17 and August 12. Osburn 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 13/12 fathoms; in these cases perhaps 

 they were actually taken near the surface. 



Fish Hawk stations: 7524 bis (2), 7525 (i), 7557 



(i). 77*7 (i). 7734- 



Phalarope and Blue Wing stations: 33 (i adult), 

 44 (few), 45 (few), 47 (several), 49 (i), 51 (many 

 in algae), 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 gills of 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.i; 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 i 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. Osburn from gulfweed. 

 Fish Hawk stations: 7536 bis, 7551 bis, 7552 bis 

 (i)> 7553 bis (i), 7557 C 1 ). 75 6o ( I ). 75^3 bis (i), 

 7564 bis, 7582 (i), 7583 (i), 7672 (i), 7685 (7), 

 7698 (2), 7699 (i adult and many young), 7700 

 (i young), 7701 (several), 7702 (2), 7703 (2), 



