124 
U. S. P. R R. EXP. AND SURVEYS-ZOOLOGY-GENERAL REPORT. 
of the caudal fin. It terminates almost evenly with the dorsal., though its posterior rays project 
a little farther backwards. The depth of the anal is nearly equal to the height of the dorsal, 
with the interradial membrane, mayhap, more deeply emarginated yet. The caudal fin is 
well developed, spear-shaped, and nearly equal to the head in length. The ventrals are slender 
and exiguous, inserted under the throat, in advance of the base of the pectorals. The pectorals 
themselves are broad, well developed, also spear-shaped and composed of dichotomised rays. 
Br. VI: VI ; D LXIX J A i, 46 ; C 3, 1, 6, 5, 1, 3 ; V i, 3 ; P. 15. 
The scales are small, sub-elliptical, broadest anteriorly, cycloid in structure, exhibiting 
diverging grooves upon their anterior section only. The lateral line is made of a very incon¬ 
spicuous series of mucous pores ; from the thoracic arch it slightly descends until it reaches the 
middle of the flanks, hence runs straightway to the base of the caudal. 
The ground color is greenish olive, the upper region of the head and body exhibiting longi¬ 
tudinally elongated small dark blotches resembling broken up bands. A series of small black 
spots may be observed along the middle of the dorsal fin, and another along its upper margin : 
the spots corresponding to the rays. The first series alluded to does not always extend to the 
whole length of the fin. The inferior region is lighter and unicolor, as well as the pectorals 
and ventral fins, whilst the caudal is transversely barred with black or dark brown. 
References to the figures. —Plate XXVb, fig. 1, represents, size of life, Lumpenus anguillaris, 
from the Bay of San Francisco, California ; fig. 2 is a vertical section of the body across the 
middle of the abdomen ; fig. 3, a scale from the middle of the flanks. 
List of specimens. 
Catal. 
No. 
No. of 
spec. 
Sex and 
age. 
Locality. 
When col¬ 
lected. 
Whence obtained. 
Orig’nl 
No. 
Nature of 
specimens. 
Collected by— 
507 
i 
Adult. _ 
San Francisco, Cal_ 
1855 
Lt. R. S. Williamson.. 
Alcoholic. 
Dr. Newberry_ 
Dr. Ayres_ 
508 
i 
, „ do_ 
_do_ 
1856 
Dr. W. 0. Ayres. 
Dr. G. Suckley, U.S.A. 
23 
_do_ 
509 
i 
...do... 
Bellingham Bay_ 
1856 
_do- 
Dr. Suckley.. .. 
ANARRHICHTHYS, Ayres. 
Gen. Char. —Body very elongated, very much compressed, taenioid and tapering. Head moderate and oblong; snout 
obtuse; mouth large. Canine teeth upon the premaxillaries and extremity of the dentary or lower jaw; pavement-like teeth 
upon the vomer, palatine, and branch of the lower jaw. Tongue soft and smooth. Branchial apertures separated under the 
throat by an isthmus. Dorsal and anal fins continuous with the caudal, which is lanceolated. Ventral fins ^.bsent. Scales 
minute; lateral line not perceptible. 
Syn. — Jlnarrhichthys, Ayres, in Proc. Cal. Acad. Nat. Sc. I, 1855, 32. 
This genus differs from Anarrldchas, to which it is closely related, chiefly by the taenioid 
form of its body and the continuity of the dorsal and anal fins with the caudal, as in Zoarces. 
The head, in shape and structure, is Anarrhichas-Uke. Zoarces has ventral fins, which are 
wanting in Anarrliichas and Anarrhichthys. 
