134 Bulletin, Vanderiilt Marine Museum, Vol. Ill 



surrounding the eye; the flagellum is biramose, the outer branch 



having a distinctive, fleshy proximal portion. 



The external antennae have the basal peduncular article produced 



to a sharp triangulate point on the external inferior distal angle; 



the flagellum is quite as long as the animal's body; the scaphocerite 



is triangular and almost as long as the rostrum and has a deep 



submedian longitudinal groove; the inner margin is crenulate and 



heavily fringed ; the outer half of the distal margin is an apical 



spine. 



The legs have both lateral margins heavily fringed with long, 



plumose setae; the first and second pairs of legs are weakly chelate, 



subequal, each being nearly as long as the third pair of legs; the 



third, fourth and fifth pairs of legs are subequal, slender but robust ; 



the dactyli are spinulose. The basecphyses are long, multiarticulate, 



plumose. 



The stylambes of the inner branches of the pleopoda are slender, 



oval, with the margins crenulate and heavily setiferous. 



The rostral formulae varies; detailed discussion of this variation 



as shown in a large series of specimens taken by the ^'Arcturus" is 



given in my report of the Pacific Deep-Sea Crustacea of that 



Expedition. 



Synonymy. — Acanthephyra purpurea A. Milne Edwards, Compt. 

 Eend. Acad. Sci., Paris, t. XCIII, p. 935, 1881.— Stanley W. 

 Kemp, Fisheries, Ireland, Sci. Invest., vol. 1, p. 4, pis. 1 and 2, 

 figs. 1-3, 1904 (issued 1905). Synonymy; idem for 1908, vol. 1, 

 pp. 56-58, 1910 ; Trans. Linn. Soc. London, 2nd ser., Zool., vol. 16, 

 pt. 1, p. 64, 1913. — H. J. Hansen, Danish Ingolf Exped., vol. 

 Ill, 2 Crust. Malacost. I, Copenhagen, p. 75, 1908. — K. Stephen- 

 sen, Vidensk. Meddel. fra den Naturh. Foren., vol. 64, pp. 64 and 

 329, 1912 ; Kept. Danish Oceanog. Exped. 1908-1910 to the Medi- 

 terranean and Adjacent Seas, vol. II, Biology D 3, Decap.- 

 Macrura, p. 67, 1923.— 0. Pesta, Zool, Anz., vol. 42, p. 70, 1913.— 

 Lenz and Strunck, Deutsch Sud-Polar Exped. 1901-03, vol. 15, 

 Zool. VII, Berlin, 1914, p. 326.— DeMan, Siboga Expeditie, Mon. 

 39A 3, p. 57, pi. 6, figs. 12-12c, 1920. 



Acanthepyra parva H. Coutiere, Bull. Musee Oceanogr. de Monaco, 

 1905, p. 15, fig. 5. 



Acanthephyra purpureus T. R. R. Stebbing, Ann. South African 

 Museum, vol. 15, pt. 2, p. 96, 1915, 



