1895.] NATURAL SCIENCES OF PHILADELPHIA. 181 



water. England and Ireland (Kinahan); Scotland, 24-69 fath. 

 (Metzger); Shetland Isl. (Kinahan); North Sea, 9-20 fath. 

 (Metzger, Scott); Skagerrak and Kattegat, 6-49 fath. (Metzger, 

 Meinert); Norway (G. O. Sars); Iceland, 20-30 fath. (G. O. 



Sars). 



11. Crangon franciscorum Stimpson, 1856. 



Stimpson, Proceed. Calif. Acad. Sei., I, 2, 1856, 89. Stimpson, Boston Journ. 

 Nat. Hist. VI, 1857, p. 495, pi. 22, fig. 5. Stimpson, Proceed. Acad. Nat. 

 Sei., Philadelphia, 1860, p. 25. Kingsley, Bull. Essex Inst. X, 1878, p. 54. 



Geographical distribution: W. coast of N. America, shallow 

 water. Puget Sound, Shoalwater Bay, Tomales Bay, San Fran 

 cisco, Monterey (Stimpson). 



12. Crangon antarcticus Pfeffer, 1887. 



Pfeffer, Naturh. Mus. Jahrb., Hamburg, wiss. Anstalt. IV. 1887, p. 45, pi. 1, 

 fig. 1-21. 



Geographical distribution : South Georgia, (Pfeffer). 



13. Crangon capensis Stimpson, 1860. 



Stimpson, Proceed. Acad. Nat. Sei., Philadelphia, 1860, p. 24. 



Geographical distribution : Cape of Good Hope, Simons Bay, 12 

 fath. (Stimpson). 



NECTOCEANGON Brandt, 183*. 



Argis Kroyer, Naturh. Tidsskr, IV, 1842, p. 267 (npmen prseoccupatumjy^ - ^!^ 

 Nectocrangon Brandt, Krebse in: Middendorff's Siber. Beis. II, Zool. I, 1851, 

 p. 114. Kingsley, Proceed. Acad. Nat. Sei., Philadelphia, 1879, p. 412. 



Second pereiopoda not shortened, with chela. Five branchiae, like 

 Crangon. Eyes partly concealed by the frontal margin. Posterior 

 pereiopoda with lanceolate dactyli with fringes of hair. 



a : . Behind the rostrum two spines in the median line of carapace. 

 N. lar (4). 



a 2 . Behind the rostrum three well developed spines in the median line 

 of carapace, between the rostrum and the first spine a rudimentary 

 one N. alaskensis (1). 



1. Nectocrangon lar (Owen) 1839. 



Crangon lar Owen, Zool. Beechey's Voy. Blossom, 1839, p. 88, pi. 28, fig. 1. 



Argis lar (Ow. ) Kröyer, Naturh. Tidsskr. IV, 1842, p. 255, pi. 5. fig. 45-62. 



Nectocrangon lar (Ow. ) Stimpson, Proceed. Acad. Nat. Sei. Philadelphia, 

 1860, p. 25. Stimpson, Annal. Lye. New York, X, 1874, p. 125. Kingsley, 

 Bull. Essex Inst. X, 1878, p. 55. Smith, Trans. Connect. Acad. V, 1879, 

 p. 61. Murdoch, Bep. Pol. Exped. Point Barrow, 1885, p. 139. 



Geographical distribidion : Northern circumpolar. — Arctic Ocean 



