212 BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



32. Genus SYSCENUS Harger. 



Bod} 7 depressed. Abdomen abruptly narrower than thorax. 



Eyes wanting. 



First two articles of the first pair of antennae not expanded or dilated. 



Mandibles without molar expansion. Maxillipeds with the palp 

 composed of two articles. 



First three pairs of legs with the propodus not expanded, cylin- 

 drical; dactylus abruptly curved in the middle, and terminating in a 

 very sharp point. Four posterior pairs with the propodal joint elon- 

 gated. 



SYSCENUS INFELIX Harger. 



Syscenus infelix HARGER, Report U. S. Commissioner of Fish and Fisheries, Pt. 

 6, 1880, pp. 387-390; Bull. Mus. Comp. Zool. Harvard College, XI, 1883, No. 

 4, pp. 100-102, pi. in, figs. 5-5a; pi. iv, figs. 3-3h. 



Harponyx pranzoides SARS, Forhandlungen i Videnskab Selsk. Christiania, 

 No. 18, 1883 (young). 



Rocinela lilljeborgii BOVALLIUS, Bihang. till Vetensk. Akad. Handl., X, No. 10, 

 1885, pp. 3-10, pis. i-n. 



Syscenus lilljeborgii BOVALLIUS, Bihang. till K. Sv. Vet. Akad. Handl., XI, No. 

 17, 1886-87, pp. 17-18. 



Syscenus infelix RICHARDSON, Proc. Amer. Philos. Soc., XXXVII, 1898, p. 8 (foot- 

 note); American Naturalist, XXXIV, 1900, p. 219; Proc. U. S. Nat. Mus., 

 XXIII, 1901, p. 524. NORMAN, Ann. Mag. Nat. Hist. (7), XIV, 1904, p. 437. 



Localities. Latitude 41 34' 30" north, longitude 65 54' 30" west; 

 latitude 40 11' 40" north, longitude 68 22' west; Marthas Vineyard; 

 south of Long Island; off Nantucket Shoals; all along the Atlantic 

 coast as far south as Delaware Bay; west coast of Norway at Hoitingso 

 and Bekkervlg (Sars); coast of Bohuslan (Bovallius); British Isles 

 (Norman). 



Dept h. 80-640 fathoms; 516 fathoms (Norman). 



Body elongate, nearly three times as long as broad, 10 mm. : 28 mm. 



Head three times as wide as long, 2 mm. : 6 mm. , triangular in shape, 

 with frontal margin somewhat three-lobed, the median lobe being 

 anterior to the other two and acutely produced between the basal arti- 

 cles of the antennas, but not meeting the frontal lamina on the other 

 side. The eyes are absent. The first pair of antennae have the three 

 articles of the peduncle of equal length and all conspicuous. The 



a In the Proc. U. S. Nat. Mus., XXVII, 1904, pp. 6 and 9, I refer to the genus 

 Harponyx as a separate genus. Doctor Hansen, in a letter, called my attention to this 

 error, saying that Sars had suppressed the genus, a fact which I had temporarily 

 overlooked. 



