ISOPODS OF NORTH AMERICA. 



3()7 



anteriorly at the sides to sun-ound the postei-ior portion of the liead. 

 All th(> seo-nients are equal in lenotii. The epinieron of the second se*;- 

 nicnt extends half the length of the lateral iiiargin; it is broader at its 

 anterior end than at its posterior end. The e|)iniera of the third and 

 fouitli segments occupy the anterior two-thirds of the lateral margin. 

 The epimeron of the fifth segment extends almost the entire length of 

 the lateral margin of the segment. The epimera of the sixth and seventh 

 segments reach the posterior extremity of the lateral margin, and ai"e 

 broader at the posterior end than at the anterior end. The legs are all 

 similar. The inferior margin of the merus, car})us, and projKxlus is 

 densely furnished with hairs. 



The abdomen has two short segments and one long terminal one 

 with lateral rudiments of another })artly coalesc(»d segment. The 

 terminal segment ta})ers to about the middle, and from that point to 

 the post-lateral angles, the sides are nearly parallel. The lateral angles 

 are rounded. The posterior margin is produced in an obtuse median 

 process, triangulate in shape, and extending sonu* distance beyond the 

 lateral angles. The apex of this process is rounded. 



IDOTHEA PHOSPHOREA Harger. 



Jdotca phosphorca IIai«;ek with N'crrill, Rejiort U. 8. Coiumiasioner of P^isli and 

 Fisheries', Pt. 1, 1873, p. 5(59 (275); p. 816 (22).— Vekkill, Am. Jour. Sci., 

 1874, pj). 43, 45, 131; Proc. Amer. Assoc, 1874, 

 pp. 362, 367, 369. — Whiteaves, Am. Jour. Sci., 

 VII, 1874, p. 218.— Harger, Proc. U. S. Nat. 

 Mus , II, 1879, p. 160; Report U. S. Commis- 

 sioner of Fish and Fisheries, Pt. 6, 1880, pp. 347- 

 348, pi. V, figs. 27-29. 



Idolea marina var. pJiosphorea Miers, Journ. Linn. 

 Soc. London, Zoology, XVI, 1883, pp. 31-32. 



Llotea phoKphorea Richardson, American Naturalist, 

 XXXIV, 1900, p. 227; Proc. U. S. Nat. Mus., 

 XXIII, 1901, p. 541.— Paulmier, Bull. New York 

 State Museum, 1905, pp. 176-177. 



LocalHiex. — Coast of New England to Hal if ax, 

 Nova Scotia, and the Gulf of St. Lawrence; 

 Runmaro. Stockholms Skargard (J. Lindahl). 



Depth. — Surface to 18 fathoms. Found 

 among seaweed; part of contents of haddock 

 stomach. 



Body oblong-ovate, three times longer than broad, 7 mm.: 21 nun. 

 Length of abdomen a little more than one- third the entire length of 

 the body. S nnn.:*Jl mm. 



Head l)roader than long, with the anterior margin .straight on (>itliei- 

 side of a slight median excavation. The eyes are moderately large, 

 round, compound in structure, and placed just in front of the median 

 transverse line at the extreme lateral margin. Basal article 'of first 



