108(«). AGONIDiE. 723 



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

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

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

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

 pseudobranchice very large, usually extending down the inner side of 

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



eye; :2 small spines above suoiit; dorsals well separated. Head 3|; depth 3. D. 

 IX-IJ; A. 10; Lat. 1. 33. Kamtschatka. iGunlhcr.) 



(Aspidophoru9 quadricornis Cuv. «& Val. iv, 221, 1829: Jgoniis qiiadricornis Giinthcr, 

 ii, 215.) 



HIPPOCEPHALUS Swainson. 



(Swainson, Class. Fish. &c., 1839, 272: type Aspidopkorus supereiliosus 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. {iTtitoi, horse; HEcpaXrj, head.) 



H. japonieus (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; 

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

 as long as pectorals; dorsals separated by a f.pace greater than length of either; fins 

 all very rough. Depth 5. D. VI-17; A. 8; Lat. 1. 45. L. 12 inches. Kurile Islands. 

 {Cm: 4- Yah) 



{CothiH japonieus Pallas, Spicilcgia fasc. vii, 31, 1772: Agonus curUicus and Agoints 

 sfegophthalmtoi Tilcsius, Mem. Ac. Petersb. iv, 416, 427: Aspidopkorus superciliosus Cuv. 

 & Val. iv, 215: Agonus stegophthalmus, Gunther, ii, 214.) 



Brachyopsis 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; depth 8. D. XI-7; 

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



{Agonus dodekaiidrus Tiles. Mdni. Ac. Petersb. iv, pi. 13, 1811: Phalangistes lorieatus 

 Pallas, Zoogr. Ross.-Asiat. iii, 114: Aspidodophorus dodecaiidrus Cuv. & Val. iv, 209: 

 Agonus dodccaiidrus Gthr. ii, 214.) 



Siphagonus segaliensis (Tiles.) Steind. 



Yellowish brown; fins with black bands. Form resembling Brachyopsis rostraius, 

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

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

 dorsal; no barbels under the throat; gill-meml>ranes 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) 



{Syngnathus segaliensis Ti\os. M6m. Soc. Imp. Nat. Moscou, ii, 216: Agonus Iwvigatua 

 Tilesius, MtSm. Acad. Petersb. iv, 436: "Aspidophove lisse" Cuv. & Val. iv, 214.) 



