184 Bulletin, Vanderhilt Marine Museum, Vol. Ill 



The external maxillipeds are strong, leg-like, the two distal articles 

 slender, subequal in length and heavily fringed with bushy setae. 



The first legs are chelate, the merus long, compressed, cylindrical, 

 with an acute spine almost in the anterior lateral margin almost mid- 

 way and a smaller, acute spine at the distal margin of the posterior 

 margin ; the carpus is short, with two spines on the lower distal mar- 

 gin, the upper surface convex, with a blunt tooth at the median angle 

 and another at the inner carpal angle; the propodus is long, dorso- 

 ventrally flattened, nearly rectangular, with the distal margin slightly 

 oblique and convex and with a sharp, outward-directed spine at the 

 inner distal angle; the short, curved dactyl is attached at the outer 

 distal angle and fits across this curved end of the propodus, its tip 

 crossing upon the base of the propodal spine or finger. 



The second legs are extremely slender, obscure, slightly longer than 

 the first pair ; merus and carpus both very slender, greatly elongated, 

 subequal ; the carpus is one and a half times as long as the propodus ; 

 the propodus is small, two-thirds as long as the carpus, the dactyl 

 composing one-fifth to one-third of this length, feeble, with the distal 

 margin dentate and furnished with numerous fine, bristly setae. 



The third legs are decidedly weaker than the fourth and fifth pairs 

 which they otherwise resemble; the merus and carpus are subequal; 

 the propodus is one and two-fifths as long as the carpus ; the dactyl is 

 needle-like, three-fifths as long as the propodus, exceedingly acuminate. 

 The fourth and fifth legs are more robust and have the dactyl 

 longer in proportion to the carpus. 



Synonymy. — Crangon vulgaris A. S. Packard, Canadian Nat. and 

 Geol., vol. 8, No. 6, Dec, 1863, p. 418; Mem. Boston Soc. Nat. 

 Hist., vol. 1, 1866-69, p. 302.— Whiteaves, Catal. Marine Invert. 

 Eastern Canada, Geol. Surv. Canada, Ottawa, 1901, p. 252. Fre- 

 quently confused with Crangon crangon (Linne) and Crangon 

 vulgaris Fabricius by various authors. 

 Crangon septemspinosa Say, Joum. Acad. Nat. Sci. Phil., vol. 1, p. 

 246, 1818. — Rathbun, Harriman Alaska Exped., vol. 10, Crus- 

 tacea, p. 116; Report Canadian Arctic Exped., 1913-18, vol. 7, 

 Crustacea, part A, p. 6A, 1919. 



Genus: PONTOPHILUS Leach. 

 Pontophllus norvegicus (M. Sars). 

 Plate 69. 

 Type: Collected along the entire coasts of Norway, in the fjords 

 from Christiania Fjord to Var anger Fjord. 



