118 S. I. S?nUh — Crustaceans of the Atlantic Coast. 



longer than tlie sixth segment of the abdomen, and is furnished with 

 a series of long seta3 on the inner margin. The inner ramus is much 

 longer than the base ; of its two segments the proxinuxl is much the 

 longerand is armed with six to eight stout spines on the inner margin 

 and witli three to five much more slender spines on the outer; the 

 distal segment terminates in a very long and stout spiniform tip, at 

 the base of which tliere is a long seta on the outside, and upon the 

 inner edge about three spines like those upon the proximal segment. 

 The outer ramus is slightly longer than the inner, tapering, and 

 slightly curved outward at the tip, armed along the inner edge and 

 at the tip with a few long setje, and on the outer edge and above with 

 a few sett\3 near the middle. 



The adult males difier from the females as usual in the genus. The 

 carapax is not as high posteriorly, the lateral margin is more nearly 

 straight, not denticulate anteriorly, the anterior angle rounded, and 

 the frontal margin is very nearly straight throughout. The major 

 tlagellum of the antennulte shows distinctly four segments. The 

 uropods are similar to those of the female, but very much more elon- 

 gated and armed with more numerous and longer spines and setcB, both 

 of which are, as usual, plumose. The setae which are so conspicuous 

 upon the posterior margin of the terminal segment of the abdomen 

 of the female, appear to be wholly absent in the male. 



Length of adult females, about 5""" ; males a very little longer. 



Oif Halifax!, Nova Scotia, 1877 : females carrying eggs common, 

 42 fathoms, fine sand, and 52 fathoms, sandy mud ; also two females 

 from 57 fathoms, stones, sponges and red algse. About thirty miles 

 south of Halifax!, 110 fathoms, fine sandy mud. Gulf of St. 

 Lawrence!, 1873 (J. F. Whiteaves) : both males and females, south 

 of the eastern part of Prince Edward Island, and in 70 fathoms, oft" 

 the Bay of Chaleurs. 



Lamprops quadriplicata, sp. nov. 



Female. The cephalothorax is as long as the abdomen exclusive 

 of the telson. The carapax is about as long as the first four of the 

 free segments, and, as seen in a side view, very slightly arcuate 

 dorsally, the front truncated above and with a slight sinus in the 

 frontal margin beloAV it, leaving the antero-inferior angle slightly pro- 

 jecting, but obtuse and evenly rounded, and in most of the specimens 

 armed with three or four very minute teeth. On each side of the car- 

 apax there are four, very distinct, arcuate and nearly parallel plications, 

 of which the first is short and extends from the antero-inferior angle to 



