108 (). AGONID^E PODOTHECUS. 729 



anal similar to soft dorsal; ventral I, 2; plates without spines or keels; 

 no spiues on head. Gill-membranes broadly united to the isthmus. 

 North Pacific. (poOpos, a cavity; ;'wvo?, Agouus.) 



1117. B. swani (Steindacbner) Gill. 



Clear yellowish ; a blackish cross-bar downwards and forwards from 

 base of first dorsal; another between the dorsals, and a third behind 

 dorsal and anal; a dusky bar across iuterorbital space and through eye; 

 fins all mottled or barred. Nuchal pit broader than long, the plates be- 

 hind sending three processes into it; top of head with two broad par- 

 allel ridges, the space between them transversely concave; preopercular 

 margin denticulated ; breast with large plates, similar to those on sides 

 of body. Head 3J; depth 3J. D. III-5; A. 5; P. 12; C. 12; Y. I, 2; 

 Lat. 1. 32. Puget's Sound; one specimen known. (Steindachner.) 



(Hypsagonus swanii Steindacbuer, Ichtb. Beitritge, v, 144, 1876.) 



6. OE>ONTOPYXIS Lockington. 

 (Lockington, Proc. TT. S. Nat. Mas. ii, 328, 1879: type Odontopyxis trispinosus Lock.) 



The genus differs from Podothecus chiefly in the presence of vomerine 

 teeth. The body is very slender ; and the fins few-rayed, (odtuv, tooth ; 



True::?, box.) 



1118. O. trispinosus Lock. 



Olivaceous, with six or seven darker bands; fins with dark blotches. 

 A sharp, rather long, movable spine upon the tip of the snout, its tri- 

 angular base projecting beyond the jaws; behind this a pair of recurved, 

 fixed spines ; supraorbital ridge prominent, ending in a backward- 

 directed spine; maxillary with two minute barbels; isthmus broad; 

 eye very large; forehead strongly convex, longitudinally transversely 

 strongly concave; a deep nuchal cavity divided by a longitudinal ridge; 

 preorbital with a spine directed backward; eye large; a circlet of hori- 

 zontal spines at base of caudal. Head 5 in total length ; depth 10 to 

 12; eye 3f in head. D. IV-6; A. 6; V. I, 2; P. 14; 0. 11; Lat. 1. 36. 

 L. 3 inches. Pacific Coast from San Francisco to Santa Barbara. 



(Odontopyxis trispinosus Lockingtou, Proc. U. S.Nat. Mus. ii, 328, 1879.) 



3T. PODOTHECUS Gill. 

 (Par a (/onus Gill.) 



(Gill, Proc. Nat. Sci. Pbila. 18G1, 259: type Podothecus peristethus G'M = Agonu8 acipen- 

 serinus Tiles.) 



Body elongate, fusiform; head long, compressed, armed above; snout 

 protruding much beyond the small, inferior, U-shaped mouth; teeth 



