Classijication of the Order Pediculati. 283 



of 3 ceplialic rays, separate or connected at the base; soft 

 dorsal moderate or rather long, anal siiort or moderate, 

 ^lesothnioid narrow, forming a vertical interorbital septum, 

 lying between but well separated from the orbital portions 

 _ of the frontals ; posterior end of mesethmoid attached to 

 anterior end of united portion of frontals (fig. 5, B) ; opercles 

 narrow. Vertebrae 19 ; pra3caudals not elongate, with 

 separate neural spines and from the tilth with strong parapo- 

 physes. Three long pectoral radials. 



Subfamily 1. Antennasiinm * . 



Form rather deep; mouth moderate, vertical or oblique, 

 with well-developed cardiform teeth ; eyes lateral, not pro- 

 jecting. Illiciuin of moderate length, with terminal flap ; 

 soft dorsal of 10 to 15 rays, anal of 6 to 9 ; pectoral un- 

 divided ; pelvics free. 



Anlennarius, Pterophryne, Saccarius, &c., with numerous 

 species from tropical seas. 



Subfamily 2. Tetrabrackiinje. 



Form elongate ; mouth small, transverse, superior ; teeth 

 feeble ; eyes superior, projecting. lUicium a small simple 

 filament ; soft dorsal of 18 rays, anal of 12 ; pectoral divided 

 into an upper and a lower portion ; pelvic broadly connected 

 by membrane to base of pectoral. 



A single species, Tetrabrackium ocellatum, Giinth., from 

 New Guinea. 



Family 2. BrachionichtliyidaB. 



Brachionichihys, with a icvf species from Southern 

 Australia, differs externally from the Antennariinje in the 

 more elongate form, the second and third rays of the spinous 

 dorsal fully connected by membrane, the longer soft dorsal 

 (15 to 20 rays), and the higher and more posterior gill- 

 openings, behind the pectorals. The skeleton has been 

 figured by Cuvier (Mem. Mus. Paris, iii. 1817, pi. 18) and 

 is similar to that of Antennarius, except that there are 

 23 vertebrae and only 2 pectoral radials. 



Family 3. ChaunacidaB. 



Chaunax, with a few species from rather deep water, 

 differs from the Antennariidse in many important characters ; 



* Histionotophorus bassani, Zigno, from the Upper Locene o Monte 

 Bolca, probably belongs to tliis subfamily {cf. Eastman, Bull. Mus. Comp. 

 Zool. xlvi. 1904, p. 32, and Gill, ' Science,' (2) xx. p. 845). 



