542 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxiii. 



Synidotea nodulosa Harger, Am. Jour. Sci., XY, 1878, p. 374; Proc. U. S. Nat. 

 Mus., II, 1879, p. 160; Report U. S. Commissioner of Fish and Fisheries, 

 1880, Pt. 6, pp. 351, 332, pi. vi, figs. 33-35. 



Habitat . — Southern Greenland; Halifax; Georges Banks; Arctic 

 Seas and southward on Pacific coast as far as British Columbia. 

 De^Jth.—lQ to 119 fathoms. 



105. SYNIDOTEA MARMORATA (Packard). 



Idotea niarmorata Packard, Mem. Bos. Soc. Nat. Hist., I, 1867, p. 296, ])1. viii, 



fig. 6.— Whiteaves, Canad. Nat., 1875, p. 262. 

 Idotea bicuspida Streets and Kingsley, Bull. Essex Inst., IX, 1877, p. 108. 

 (f) Idotea rugidosa Buchholz, Zweite Deutsche Nordpolarf., II, 1874, p. 285. 

 Stjnidotea hkuspida Harger, Proc. IT. S. Nat. Mus., II, 1879, p. 160, Eep. U. S. 



Fish Com., 1880, p. 352, Pt. 6. 

 Edotea hicuspida Miers, Jour. Linn. Soc. London, XVI, 1883, p. 66. 

 Synidotea mar morata'&-E.^'E.mcT, Proc. Acad. Nat. Sci. Phila., 1897, p. 392. 



Ilalntat. — Labrador; Grand Bank. 

 Depth.— oC) to 129 fathoms. 



106. SYNIDOTEA BICUSPIDA (Owen). 



Idotea hiensplda Owen, Crustacea of the Blossom, 1839, p. 92, pi. xxvii, fig. 6. — 

 Streets and Kingsley, Proc Essex Inst., IX, 1877, p. 108. 



Idotea marmorata Packard, Mem. Bos. Soc. Nat. Hist., I, 1867, p. 296, pi. viii, 

 fig. 6. 



Idotea palchra Lockixgton, Proc. Cal. Acad. Sci., VII, 1877, p. 45. 



Synidotea tncuspida Harger, Proc. V. S. Nat. Mus., 1879, II, p. 160; Report 

 U. S. Commissioner of Fish and Fisheries, 1880, Pt. 6, pp. 352-354.— Axel 

 Ohlin, Bidrag till Kannedomeu om Malakostrakfaunan i Baffin Bay och 

 Smith Sound, 1895, p. 14. 



Habitat. — Grand Bank; Sloop Harbor, Kynetarbuck Bay, Labrador; 

 m^ 33' N. lat., 61^ 50' W. long.; Arctic Seas; west coast of Alaska, 

 north of Bering Straits; Kara Sea. 



Depth. — 5 to 13i fathoms. 



44. ERICHSONELLAi Benedict, new name. 

 analytical key to the species of erichsonella. 



a. Surface of body smooth throughout. Outline of liody regular. Antennulfe short. 

 Caudal segment shows but slight traces of a lateral tooth near its base on 



either side 107. Erichso)iella attenuata ( Harger). 



a\ Surface of body tuberculated. Outline of body serrate. Antennula^ long. Cau- 

 dal segment with a prominent lateral tooth near its base on either side. 

 b. Large bifid tubercle on center of head. Median longitudinal row of tubercles 



on each thoracic segment 108. ErlclisoticUa filiformis (Say). 



V. Large tridentate spine on center of head. Median longitudinal row of tuber- 

 cles on each thoracic segment, and a longitudinal row of tubercles on either 

 side of median row on first four thoracic segments. 



109. Erichsonella floridana Benedict, new species. 



^ Proposed by Dr. James E. Benedict for the preoccupied Erichsonia. 



