SCHIZOPOD CRUSTACEANS IN THE U. S. NATIONAL 

 MUSEUM: SCHIZOPODS FROM ALASKA.» 



By Arnold E. Ortmann, 



Of the Carnegie Museum, Pittsburg, Pennsylvania'. 



The present paper treats of a collection of Schizopods made dur- 

 ing the investigations by the Alaska Salmon Commission in 1903. 

 The collection, although small, contains a number of interesting 

 forms. One of them represents a new genus the systematic position 

 of which was ascertained with difficulty, and to which finally a posi- 

 tion could be assigned only by altering the definition of one of the 

 established subfamilies of the family Mysidse. 



The paper was originally to be published by the Bureau of Fish- 

 eries, but was turned over to the U. S. National Museum, and it 

 forms here the second instalment of a series of publications intended 

 to describe the Schizopods of the national collections. 



Order MYSIDACEA Boas. 



Family LOPHOGASTRID^ G. O. Sars. 



Genus GNATHOPHAUSIA Willemoes-Suhm. 



GNATHOPHAUSIA GIGAS Willemoes-Suhm. 



G. O. Sars, Rep. Voy. Challenger, XIII, 18S5, p. 33, pi. in.— Ortmann. Bull. 

 IT. S. Fish Comin. for 1903, 1905, p. 968 ; Proc. U. S. Nat. Mus., XXXI, 

 1906, p. 36, pi. ii, figs, la, lõ. 



Station Xo. IßßH.—l male (?)', jun.— Off Sitka Sound, 922 fathoms. 

 (Color, dark crimson). 



Previous records. — Atlantic: West of Azores, 2,200 fathoms {Chal- 

 lenger) ; between Cape Charles and Long Island, 852 fathoms 

 (Albatross)', Pacific: Hawaiian Islands, 856-767 fathoms; Bering 

 Sea, 399 fathoms; between Unalaska and Kadiak, 695 fathoms; be- 

 tween Sitka and Columbia River, 876 fathoms (Albatross) . 



«For first paper see Proc. IT. S. Nat. Mus., XXXI, 1906, pp. 23-54. 



Proceedings U. S. National Museum, Vol. XXXIV— No. 1591. 

 Proc. N. M. vol. xxxiv— 08 1 1 



