212 BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



32. Genus SYSCENUS Harger. 



Body depressed. Abdomen abruptl}- narrower than thoi"ax. 



E3'es wanting. 



First two articles of the first pair of antenna? not expanded or dihited. 



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. 



Suscenus infellx Haeger, Report U. S. Commissioner of Fish and Fisheries, Pt. 

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

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



Harponijx(^ prmizoldes Sars, Forhandlungen i Videnskal) Selsk. Christiania, 

 No. 18, 1883 (young). 



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

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



^iji^coMH lilljeborgii Bovallius, Bihang. till K. Sv. Vet. Akad. Handl., XI, No. 

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



Si/scenus infelix Kichardson, Proc. Amer. Philos. Soc, XXXVII, 1898, p. 8 (foot- 

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

 XXIIT, 1901, p. 524.— Norman, Ann. Mag. Nat. Hist. (7), XIV, 1904, p. 437. 



Local it lei<. — Latitude 41^ 34' 80" north, longitude G.5'^ 54' 30" west; 

 latitude 40^ 11' 40" north, longitude 08" 22' west; Marthas Vineyard; 

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

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

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

 (Norman). 



Depth.~-m-(S^() fathoms; 516 fathoms (Norman). 



Body elongate, nearly three times as long as bi'oad, lo mm. : 28 mm. 



Head three times as wide as long, 2 mm. : 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 anteinue, l)ut not meeting the frontal lamina on the other 

 side. The ej'es are absent. The first pair of antenna' have the three 

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



«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. 



