965. 
Hymenocephalus lethonemus Jordan and Gilbert 
Hymanooephalus lethonemus Jordan and Gilbert, Bull. U. S. Fish Comm., 
vol. 22, p. 615, fig* , 1902 (Aug. 1904) (type locality t Sagami 
Bay, Japan). — -Jordan, Tanaka, Snyder, Journ. College Sci., vol. 
33, p. 413 (fig. 383 copied), 1913 (compiled). — Gilbert and Babbs 
Proc. U. S, Nat* Mus«, vol. 51, p.(145) 188, 1916 (Eastern Sea; east 
coast Hondo; Suruga Gulf; Sagami Bay; Uruga Strait; 197 to 440 fath¬ 
oms); Bull. U. S. Nat. Mus., No. 100, vol. 1, p. 521, 1920 (diagnosis 
in key). _«Jfeber and Beaufort, Fishes Indo Austral. Arohip., vol - . 5, 
p. 60, 1929 (part). 
Depth 7 l/4 to 9 l/2; head 5 l/4 to 6, width 1 4/5 to 2. 
Snout 3 l/2 to 4 in head, 1 to 1 l/8 in eyo; eye 3 l/4 to 3 l/2 in head, 
4- * 
1 to 1 l/o in interorbital; preoral length 4 to 4 l/2 in head; maxil¬ 
lary reaches opposite hind eye edge or slightly beyond, length from 
front end 1 4/5 to 2 in head; no barbel; teeth minute, in very narrow 
villifora bands in jaws; interorbital 3 to S 1/3 in head, unevenly 
cavernous and concave. Gill rakers 4+20 low clavate spinescent tuber- 
v 
cles on second arch, l/2 of gill filaments, which 3 3/4 in head. 
Scales all fallen and pockets obscure so squamation not made 
out. 
t 
