192 Bulletin, Vanderhilt Marine Museum, Vol. Ill 



Polar Voyage, p. 203, 1824.— H. Milne Edwards, Hist. Nat. 

 Crust., vol. 2, p. 343, 1837. 

 Sahinea septemcarinata Owen, Appendix to Koss's Narrative of a 

 Second Voyage in Search of a Northwest Passage, p. 82, 1835. — 

 Sars, Forhandl. Vidensk. Selsk. Christ., p. 125, 1858 (1859).— 

 Stimpson, Proc. Acad. Nat. Sci. Phila., 1860, p. 94. — Sidney I. 

 Smith, Trans. Conn. Acad. Arts and Sci., vol. 5, pt. 1, p. 57, pi. 

 11, fig. 5, 1879.— Spence Bate, Kept. Voy. ''Challenger," Zool., 

 vol. 24, p. 493, pi. 89, fig. 9, pi. 90, fig. 1, 1888.— Whiteaves, 

 Catal. Marine Invert. Eastern Canada, publ. by Geol. Surv. Can- 

 ada, 1901, p. 254. — Hansen, Danish Ingolf Exped., vol. 3, pt. 2, 

 p. 52, 1908. — Rathbun, Report Canadian Arctic Exped., 1913-18, 

 vol. 7, Crustacea, part A, p. 7A, 1919, 



SCHIZOPODA. 



Order: MYSIDACEA. 



Family: LOPHOPGASTRIDAE. 



Genus: GNATHOPHAUSIA Willemoes Suhm. 

 Gnathophausia willemoesia G. S. Sars. 



Type: Two specimens, taken by the ''Challenger," south of Am- 

 boina, Lat. 4° 21' S., Long. 129° 7' E., in 1425 fms., and deposited in 

 the British Museum. 



Distribution: Known from seven specimens; the type and four 

 taken in the American Tropical Pacific by the "Albatross" and the 

 "Ara" specimen, in depths ranging from 493 to 1425 fms. 



Material examined : One specimen, dredge down 300 fms., bottom 

 depth 1400 fms., 7 miles S. W. of Cape Malo, Panama, Pacific Ocean, 

 March, 1926. 



Color: Spectrum red. (See Faxon's beautiful color plate.) 



Discussion: This truly gigantic Schizopod which attains a body 

 length of three to four inches, is easily recognized by its very long, 

 sword-like rostrum which is fully four-fifths as long as the carapace 

 and is armed with a row of fine denticles on each side. It is spectrum 

 red. The "Ara" specimen is one of the largest yet captured. The 

 carapace covers the entire trunk, the dorsal spine is acute, relatively 

 short, extending a little beyond the first abdominal segment. The 

 supraorbital spines are very strong, acute, anteriorly curved; the 

 antennal spines are acute ; the branchiostegal spines are obsolete. The 



