366 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 5 



792-38. Off Daphne Minor Island, 70-80 fms, Jan. 20, 1938, 2 young 



males (AHF no. 38032). 

 814-38. North of Hood Island, 20-40 fms, Jan. 28, 1938, 1 male 

 (photographed) (AHF no. 38033). 



Measurements. — Male: length 11.0 mm, width 12.6 mm. 



Habitat. — Sand and shell, sand and nullipore, sand and mud; rock, 

 coral, nullipore, and bryozoa. 



Depth.— 12-SO fms. 



Remarks. — Before the Hancock Expeditions began their work in 1931 

 this species was known only from the unique type, an ovigerous female 

 taken by the Albatross off Cape San Lucas, Lower California, in 1888. 

 Its congener, O. lata Faxon, was known from but a single specimen, a 

 male (MCZ No. 4497), taken by the Albatross off Tres Marias 

 Islands, Mexico, in 1891. Because the disparity between the male and 

 female of each species, as shown by specimens in Hancock collections, is 

 greater than that between the males of both or the females of both. Crane 

 (1937, pi. 1, figs. 1-4) mistakenly figured the male of one and the female 

 of the other as one and the same species. 



From a study of the extensive Hancock series of the 3 species, it would 

 seem that O. lata is the Gulf of California-Mexican species, O. galapa- 

 gensts Rathbun the Galapagos endemic species, and O. levis the widely 

 distributed species of warmer equatorial waters. 



Subtribe BrACHYGNATHA 



Superfamily OXYRH YNGH A 



Family MAJIDAE 



Subfamily InAGHINAE 



Genus STENORYNGHUS Lamarck, 1818 



Stenorynchus debilis (Smith) 



Plate 63, Fig. 1 



Leptodta sagittaria Milne Edwards and Lucas, d'Orbigny's Voy. I'Amer. 



Merid., vol. 6, pt. 1, p. 3, 1843; atlas, vol. 9, Crust., pi. 4, figs. 3-3c, 



1847 ; not L. sagittaria Leach. 

 Leptodia debilis Smith, Rept. Peabody Acad. Sci. for 1869 and 1870, 



appendix, p. 87, 1871. 

 Stenorynchus debilis Rathbun, Proc. U.S. Nat. Mus., vol. 21, p. 568, 



1898; Proc. Washington Acad. Sci., vol. 4, p. 283, 1902; Bull. 129, 



U.S. Nat. Mus., p. 18, pis. 4 and 5, and synonymy, 1925. Boone, 



Zoologica, vol. 8, no. 4, p. 131, fig. 34, 1927. Finnegan, Journ. Linn. 



Soc. London, vol. 37, p. 617, 1931. Crane, Zoologica, vol. 22, no. 3, 



p. 50, 1937. 



