ISOPODS OF NORTH AMERICA. 



397 



margin of the first thoracic segment. The maxilliped has a palp of 

 three articles. 



The third and fourth segments of the thorax are longer than any of 

 the others and are also the widest. The epiniera of all the segments 

 are united with the segments. The lateral portions of the segments 

 are laterall}^ expanded, the lateral margins being almost straight. 

 Two longitudinal rows of low tubercles are placed one on either side 

 along the lateral portions of the segments, each segment having two 

 tubercles, one on either side. 



All the legs are prehensile; the lirst are much shorter than any of 

 the others. 



The abdomen is composed of one segment with suture lines at the 

 base indicating another partly coalesced segment as well as slight 

 incisions in the lateral margins. A large, rounded prominence is situ- 

 ated in the median line at the base of the abdomen. This prominence 

 is followed by a depression, so that in a lateral view the abdomen is 

 seen to be in the form of two elevations with a deep depression sepa- 

 rating them. The extremity is also separated off from the second 

 elevation by another depression. The sides of the abdomen converge 

 rapidl}' from a point a little below the middle to a narrow and pointed 

 extremity. 



EDOTEA MONTOSA (Stimpson). 



Idotea utontosa Stimpson, Smithsonian Contributionsto Knowledge, VI, 1853, p. 40. 

 Epehjs moiitosus Harger with Verrill, Report U. S. Commissioner of Fish and 



Fisheries, Pt. 1, 1873, p. 571 



(277); p. 370 (76).— Verrill, 



Am. Jour. Sci., VII, 1874, p. 45; 



Proc. Amer. Assoc, 1874, p. 



367. — Smith and Harger, Trans. 



Conn. Acad. Sci., Ill, 1874, p.3.— 



Harger, Proc. U. S. Nat. Mus., 



II, 1879, p. 161; Report V. S. 



Commissioner of Fisli and Fish- 

 eries, 1880, Pt.6, pp. 359-360, pi. 



vni, figs. 44-47. 

 Edotea monlosa Miers, Jour. Linn. 



Soc. London, XVI, 1883, p. 72.— 



Richardson, American Natural- 

 ist, XXXIV, 1900, p. 228; Proc. 



U. S. Nat. Mus., XXIII, 1901, p. 



545. 



Localities. — Block Island Sound ; 

 Long Island Sound; Vineyard 

 Sound; Eastport, Maine; Georges 

 Bank; Stellwagens Bank; Casco Bay; Bay of Fundy; Halifax, Xova 

 Scotia; Grand Menan. 



Depth. — 8 to 25 fathoms, in nuid and fine sand. 



Body ovate, a little more than twice as long as wide, -i nnn. : \) mm. 



Fig. HZ. — Edote.\ iMoNTo.sA (.Vfter Harger). 

 ■ 6. 



