ISOPODS OF NORTH AMERICA. 125 



The thoracic segments are subequal. The epimeni arc nai-row, aiid 

 those of the last three or four segments acutely pointed. 



All the al)doniinal segments are visible in a dorsal view. The ter- 

 minal segment is rounded at the sides and truncate at its extremity, 

 the lateral angles being produced in a short triangular process, between 

 which the posterior margin is distincth' denticulate and ])ears four 

 spines, which are about twice as long as the lateral teeth. The 

 uropoda are short, not reaching the extremity of the terminal seg- 

 nuMit, are truncate and crenulat(» on their posterior margins. The 

 uropoda, as well as the ttn-minal segment, are fringed with short hairs. 



The legs are long and slender and armed with many spines. 



Color, light brown marked with black spots. 



Individuals of this species were collected at Isthnms Cove, Catalina 

 Island, California, by the U. S. Bureau of Fisheries stesimer Albatross. 



Type.-^o. 22565, U.S.N.M. 



This species resembles E. (/rlmaldll Dollfus 

 more closely than any other species of the 

 genus. It differs in the following characters: 



1. The greater number of joints in the tlagel- 

 lum of the first pair of antennae. In our species 

 there are five joints, while in E. grhnaldil the 

 flagellum is uniarticulate. 



2. In the fewer number of joints in the flagel- p,^^ ios.-eurydice cau- 

 lum of the second pair of antennae Inourspecies r)ATA. last two ab- 



.1 . ^ 1 , i i! \ •\ • h^ • 7 !•• DOMINAL SEGMENTS. 



there are only twenty-hve, whde in /i. <jrinml(lu (okeatly enlarged.) 



the tlagellum consists of thirty-two articles. 



3. In the presence of four spines on the posterior margin of the 

 terminal segment. In E. (jrhitaldl! the posterior margin is denticulate. 



EURYDICE SPINIGERA Hansen. 



Eiu-jidice s})ii)igerii Hansen, Vidensk. Selsk. Skr. (6), V, 1S90, pp. :5()7-;^fi9, 

 pi. V, figs. 4-4c; pi. vi, figs. 1-lc. — Richardson, Proc. U. S. Nat. Mus., 

 XXIII, 1901, p. 516. 



Locidlty. — West Indies. " 



This species is similar to E. elegantula. The bod}^ is broader than 

 in the male of E. elegantula and is a little more than three times 

 longer than wide; the thorax is much wider and not shorter than the 

 al)domen. 



The front of the head is a little emarginate, the median process 

 being- absent. The eyes are as in the male of E. elegantula. The 

 first pair of antennic are a little stouter than in the female of E. 

 el egantida ; the first article of the peduncle is narrower, manifestly 

 reaching beyond the second article; the third article is a little wider 

 than long; the flagellum is furnished with rather numerous, rather 



« Hansen, in a paper received since this pajier was sent to jiress, says that tliis species 

 was captured in the eastern part of the Atlantic between Denmark and St. Thomas. 



