282 Mr. C. T. Regan on the 



Lophius (27 to 32 vertebraj) and Lophiomus (19 vertebrae) the 

 gill-openings are below and behind the bases of the pectorals, 

 which can be received within them, whereas in Sladenia the 

 pectorals are borne on very long projecting pseudobrachia. 



Goode and Bean (' Oceanic Ichthyology,' 1896) have 

 proposed the name Lophiodes for Lophuis mutilus, Alcock, 

 which may be a Chirolophias, but differs from the species 

 certainly referred to that genus at least in the absence of a 

 terminal flap to the illicium and the reduction of tiie post- 

 cephalic portion of tiie spinous dorsal. 



Division 2. Antennariiformes. 



Pelvic fins present. Lower pharyngeals dentigerous. 

 Gills complete on second and third arches, absent or reduced 

 to a hemibranch on first and fourth ; pseudobranchise 

 vestigial or absent. Parasphenoid not meeting frontals ; 

 depression on upper surface of skull in front of the supra- 

 occipital; frontals united for a short distance posteriorly, 

 separate for the greater part of their length. Prgecaudal 

 parapophyses directed vertically downwards, free. 



Synopsis of the Families. 



I. Spinous dorsal S-raved ; mesethmoid lying between, but separate 



from, orbital portions of frontals. 



Rays of spinous dorsal separate, or connected at 



the base only ; gill-opening below base of 



pectoral ; 3 pectoral radials 1. Antemiariidce. 



Second and tbird rays of spinous dorsal fully 



connected ; gill-opening bebind base of 



pectoral ; 2 pectoral radials 2. Brachionichthyidct. 



II. Spinous dorsal represented by tbe illicium only. 



Mesetbmoid in front of orbital portions of 



frontals ; giU-opening bebind pectoral ; 



moutb very oblique ; illicium supra-rostral ; 



3 pectoral radials 3. Chaumicida: 



Mesetbmoid between orbital portions of frontals ; 



gill-opening above pectoral ; moutb bori- 



zonthl; illicium in a cavity at anterior end 



of snout ; 2 pectoral radials 4. Onchocephalidce. 



Family 1. Antennariidae. 



Naked or spinulose, compressed ; mouth protractile ; 

 teeth in jaws and on palate; gills i + 2^ ; gill-opening 

 small, immediately below base of pectoral. Spinous dorsal 



