254 TBACHINIB^. 



in the total. Caudalis emarginate ; the spinous portion of the dorsal 

 lower than the soft ; the posterior Limb of the preeopcrculiim finely 

 denticulated. Uniform bro-wnish. (Jen.) 

 Chatham Island (Galapagos Archipelago). 



Fourth Group. PSEUDOCHROMIDES. 



Pseudocbroniidse, pt., 3Iiill. Si- Trosch. Ilor. Ichtlnjol. iii. p. 22. 

 Eyes more or less lateral. Head not cuii-assed. Lateral line 

 interrupted, or not continued to the caudal. 



SynojJsis of the Genera. 



Cleft of the mouth large ; the upper maxillary produced 



backwards 18. Opisthognatiius. 



Lateral bne interrupted; vomerine and palatine teeth ... 19. Pseudochromis. 



Lateral line interrupted ; teeth on the vomer, none on the 



palatine bones ; dorsal spines in small number 20. Ciciilops. 



Lateral line interrupted ; dorsal, anal and ventral spines 



none 2L Pseudople.siop.s. 



Lateral line interrupted, the posterior portion continued 



totbecaudal; palate smooth 22. Notothenia. 



Scales none 23. Harpagifer. 



18. OPISTHOGNATHUS. 

 Opisthognatbus, Ciiv. Regne Anim. ; Ciiv. S,' Val. xi. p. 495. 



Body rather elongate, rounded anteriorly, slightly compressed 

 posteriorly ; the upper profile of the snout parabolic ; cleft of the 

 mouth \axge, the upper maxillary produced bachuards ; eye lateral, 

 largo. Scales small, not ciliated. Lateral line not continued to the 

 caudal. One dorsal, with the unarticulated rays flexible ; ventrals 

 jugular ; the lower pectoral rays branched. In both the jaws fine 

 cardiform teeth ; palate smooth. Opercles not armed. Six bran- 

 chiostcgals ; the gill-membranes joined together inferiorly ; pseudo- 

 branchiae. Air-bladder small ; pyloric appendages none. 



Eed Sea ; East Indian Seas ; coast of Brazil. 



1. Opisthognatbus nigromarginatus. 



Opisthognatbus nigromarginatus, Jtiipp. Atl. Fische, p. 114. taf. 28. f. 4. 



sonneratii, Cuv. Regne Anim, (without descr.) ; Cuv, ^ Val. xi. 



p. 498. 



cuvieri, Valcnc. in Cur. Regne Anim. HI. Poiss. pi. 78. fig. 3, but 



not in Ctiv. <§• Val. Hist. Nat, Poiss. xi., where the same author de- 

 scribes a very diflei-ent species with the same name ! 



D. 24. A. 15. 



The upper maxiUary prolonged nearly to the pectoral. Scales 

 exceedingly small. The height of the body is six times in the total 



