725 
1C8(«). AGONID^ SIPHAGONUS. 
poral region; lower jaw slightly included; caudal peduncle very long 
and slender, forming about two-fifths the length; breast with flat 
plates; dorsal ridges high anteriorly, the median line of back from 
snout to dorsal fin concave. Head o§; depth 9. D. 5; A. 6; Lat. 1. 
about 50. L. G inches. Polar regions, southward to Cape Cod; abun- 
dant in deep water. 
{Coitus monoptcnjgius Bloch, Ausliimlische Fische, ii, 150, taf. 178; Gunther, ii, 210.) 
aa. Nasal spines obsolete. {Anoplagonus Gill.) 
1110. A. BBaei’fisaas Giinther. 
Black, obscurely marbled with grayish and brownish ; dorsal grayish, 
marbled with black; caudal black, with a gray band; anal yellowish, 
with a black dot behind each ray. Body anteriorly much broader than 
high. Head flat, depressed, triangular; nasal spines obsolete; lower 
jaw projecting; interorbital space grooved, narrower than the orbit; 
eye less than snout, 5 in head; pectorals shorter than head; ventrals 
small; breast with about IG plates. Head 5 in total length; depth 14; 
width 9. D. 5; A. 5; C. 10; P. 10; V. 2; Lat. 1. 41. Vancouver’s 
Island. [Giinther.) 
(Giinther, ii, 524: Anoplagonus inermis Gill, Proc. Acad. Nat. Sci. Phila. 1861, 167.) 
3§2.— SIPBIAGOMUS Steindachner. 
(Steindachner, Ichth. Beitriige, v, 140, 1876: type Syngnatlius segaliensis Tiles.) 
Form of Si/ngnathus ; snout jiroduced in a tube; lower jaw projecting 
beyond upiier, with a long barbel at the symphysis; gill-membranes 
free from the isthmus; both dorsals present; ventrals very short; 
plates of bodj" slightly keeled, without spine. (Latin, sipho, tube; 
Agoutis.) 
1111. S. 1[>aB’l>a.tus Steind. 
Brownish, a lengthwise black band on sides of head, becoming ob- 
solete behind. Body very slender, snbterete; median line of head and 
back concave; snout produced into a long moderately-compressed 
tube, the single barbel at the chin about twice the length of eye; teeth 
on vomer; snout and orbital rim without spines; eye in middle of head; 
suborbital narrow, unarmed; preopercle with 3 spines; large polygonal 
scales on the breast; pectorals long, reaching dorsal; ventrals very 
short, the vent close behind them. Head 4; depth = length of snout, 
9. D. VI-7; A. 9; P. 12; Lat. 1. 44. L. G inches. Coasts of Alaska 
and Japan; not rare. 
(Steindacbuer, Ichth. Beitrage, v, 140, 1876.) 
