Boone, Crustacea, Cruises of "Eagle" and " Ara," 1921-28 197 



decidedly laterally compressed; the carpus is small, only about one- 

 fourth as long as the merus, very narrow basally and dilated distally ; 

 the propodus is about a third longer than the carpus and is as wide 

 throughout its length as the carpus is distally. The dactyl is a trifle 

 longer than the propodus and is very slender, tapering to an exceed- 

 ingly acuminate point; moderately convex on its outer surface and 

 produced to a prominent tooth midway its upper or dorsal margin; 

 the anterior inner face of the carpus below this tooth is covered with 

 a mat of close-set plumose setae. 



Synonymy. — Frevillea tridentata A. Milne Edwards, Bull. Mus. 



Comp. Zool., vol. 8, p. 16, 1880. — ^A. Milne Edwards and Bouvier, 



MeuL Mus. Comp. Zool., vol. 47, p. 338, pi. 6, fig. 3, 1923. 

 Goneplax tridentata Eathbun, Bull. 97, U. S. Nat. Mus., p. 29, 1917.— 



Boone, Bull. Bingham Oceanog. Coll., vol. 1, art. 2, p. 10, figs. 2, 



3 and 4, 1927. 



Goneplax angulata (Pennant). 



Plate 66, fig. B. 



Type: The Pennant type came from Weymouth, and was in the 

 Portland Cabinet. 



Distribution : Mediterranean Sea, Atlantic Ocean on the coasts of 

 Northwestern Africa, Spain, France and England. 



Material examined : One female infested with Rhizocephalid para- 

 site dredged in 35 fms., 5 miles N. E. by N. of Cape Carthage, Gulf of 

 Tunis, Mediterranean Sea, July 21, 1927. 



Technical description : Carapace box-like, one-third wider than 

 long. Frontal margin approximately two-sevenths of the body width ; 

 relatively straight, median point faintly indicated by the ventral pro- 

 jection dividing the antennular fossae; the sidewalls are high; the 

 anterolateral angles are very acute, outward directed, the lateral mar- 

 gins are distinctly convergent posteriorly; the posterior margin is 

 wide, slightly sinuate. The dorsal surface is regularly punctate. 

 Except the clearly defined urogastric line, the regions are but scarcely 

 indicated. The female abdominal belt is of moderate width, oval, 

 seven-segmented. The sternal plastron is wide, its sutures showing 

 clearly. Orbital cavity elongate, filling the frontal margin, moderately 

 wide, broadly concave distally for the reception of the large, convex 

 cornea. The superior orbital margin is sinuate, more deeply concave 



