216 TRIGUD^. 



10. Agonus chiloensis. 



Aspidophorus chiloensis, Jcnyns, Zool. Beayle, Fishes, p. 30. pi. 7. f. 1, 

 la, 1 h ; Gay, Hist. Chil. Zool. ii. p. 174. 



D. 7 I 8. A. 9. L. lat. 38. 



Two dorsals. Vomerine teeth. Angle of the month and chin with 

 many barbels. Two pairs of spines above the snout, and two above 

 the orbit. Space between the eyes less than their diameter. Body 

 with brown cross-bars. 



Coast of Chile. 



a, h. Adult and half-grown. Valparaiso. Purchased of Mr. Bridge. 



47. ASPIDOPHOROIDES. 



Agonus, sp., m. Schn. p. 104. 

 Aspidophoroidcs, Lacep. iii. p. 227. 

 Aspidophorus, sp., Cue. iSf Val. iv. p. 224. 



Head and body angular, covered with bony plates. Lateral line 

 none. One short dorsal ; no pectoral filaments. Teeth in the jaws 

 only. 



Coasts of Greenland, reaching southwards to the northern coasts 

 of the United States. 



1. Aspidophoroides monopterygius. 



Cottus monopterygius, Block, t;tf. 178. 1". 1, 2 ; Gm. L. i. p. 1213. 



Agonus monopterygius, Bl. ScJui. p. 104. 



Aspidophoroides tranquebar, Lacep. iii. p. 228. 



Aspidophorus monopterygius, Ciu: ^- Val. iv. p. 224, vi. p. 554. pi. 169 ; 



Storer, liqj. Mass, p. 22. pi. 1. f. 1 j Dekay, New York Fauna, 



Fishes, p. 62. pi. 2. f. 6 (5) (bad). 

 Cottus monopterygius, Richards. Faun. Bar. Amer. Fishes, p. 50. 

 Aspidophoroides groinlandicus, Val. in Cuv. Heyne Anim. 111. Poiss. 



pi. 21. f. 3. 



D. 5. A. 6. L. lat. 47. 



Body elongate. One short dorsal. Vomerine teeth none. No 

 barbels. A single pair of spines above the snout ; no other spines 

 on the head. Space between the eyes rather less than their diameter. 

 Body with brown cross-bars. 



Coast of Greenland. 



a. Half-grown. Greenland. 

 h. Adult. 



48. PERISTETHUS. 



Peristedion, Lacep. iii. p. 368 ; Cuv. Sf Val. iv. p. 101. 

 Peristethus, Kuup, Proc. Zool, Soc. 1859, p. 103. 



Head parallelepiped, with the ui)iier surface and the sides entirely 

 bony ; each pra)orbital prolonged into a long flat process, projecting 

 beyond the snout ; body cuirasscd with large bony plates. One or 

 two dorsals, the second of which is the more developed ; two pec- 



