108 ^. AGONID.E. 723 



head externally entirely bony, the plates often spiuous; eyes large, placed 

 high; suborbital stay cuirassing the cheek; mouth terminal or inferior; 

 barbels often present; teeth small, in villiform bands, on the jaws, and 

 often on the vomer and palatines also ; gills 3 , no slit behind the last ; 

 pseudobranchice very large, usually extending down the inner side of 

 the opercle; gill-rakers small; gill-membranes united, free or joined to 



eye; 2 small spines above snout; dorsals well separated. Head 3; depth 3. D. 

 IX-(5; A. 10; Lat. 1. 33. Katutschatka. (GUnther.) 



(Aspidophorus quadricornis Cuv. & Val. iv, 221, 1829: Agonus quadricornis Gunther, 

 ii, 215.) 



HIPPOCEPHALUS Swainson. 



(Swainson, Class. Fish. &c., 1839, 272: type Aspidophorus superciliosus Cuv. & Val.) 



Body moderately elongate, compressed, the head depressed at the nape; dorsal 

 spines strong, the first inserted close behind the nape; dorsals well separated; jaws 

 equal, or the lower slightly the longer; breast granulated; gill-membranes not de- 

 scribed, probably free. ('iTtnoS, horse; KScpaXrjj head.) 



H. japonlcus (Pallas) Gill. 



Yellowish brown, the body banded and the fins with dark lines. Top of head not 

 very rough; a fiat triangular prominence, directed upward and outward above each 

 eye, concealing the eye when viewed from above; 2 spines above the snout; subor- 

 bital with 2 or 3 spines, one of them with a barbel; suborbital stay broad, gibbous; 

 barbels small; bony plates rough-striate, pyramidal, the center raised; ventrals half 

 as long as pectorals; dorsals separated by a space greater than length of either; fina 

 all very rough. Depths. D. VI-17; A. 8; Lat. 1. 45. L. 12 inches. Kurile Inlands. 

 (Cuv. $ Val.) 



(Cottus japonicus Pallas, Spicilegia fasc. vii, 31, 1772: Agonus curilicus and Agonus 

 stegophtlialmua Tilesius, Me~m. Ac. Petersb. iv, 416, 427: Aspidophorus superciliosus Cuv. 

 & Val. iv, 215: Agonus ateyophthalmus, Giinther, ii, 214.) 



Sracliyopsis dodecaedrus (Tiles.) Bean. 



Brownish, body and fins banded. Body elongate ; snout obtuse, depressed, without 

 spines; mouth nearly vertical, the lower jaw considerably produced; interorbital 

 space as wide as eye; suborbital with spines; breast with many small convex polyg- 

 onal plates; keels of the scales ending in a small point. Head 5; depths. D. XI-7; 

 A. 15; P. 15; V. I, 2; Lat. 1. 40. Kamtschatka; common. (Cuv. <Sr Val.) 



(Agonus dodekaedrus Tiles. M6m. Ac. Petersb. iv, pi. 13, 1811: Phalanglstes loricatus 

 Pallas, Zoogr. Ross.-Asiat. iii, 114: Aspidodophor us dodecaedrus Cuv. & Val. iv, 209: 

 Agonus dodecaedrus Gthr. ii, 214.) 



Siphagonus segaliensis (Tiles.) Steind. 



Yellowish brown ; fins with black bands. Form resembling Bracliyopsis rostratus, 

 but the tail shorter; body depressed; eye behind middle of head; two spines on the 

 suborbital, and some others about eyes; dorsals contiguous; anal longer than second 

 dorsal ; no barbels under the throat ; gill-membranes and barbels at chin undescribed. 

 D. VII-8; A. 12; C. 10; P. 14; V. I, 2. L. 7 inches. Island of Saghalien. (Cuv. $ 

 Val.) 



(Syngnatlius segaliensis Tiles. Me"m. Soc. Imp. Nat. Moscou, ii, 216: Agonus Icevigatus 

 Tilesius, Me"m. Acad. Petersb. iv, 436: " Aspidophore llsse" Cuv. & Val. iv, 214.) 



