176 



SoiLtherii Cross. 



by me, including Bathydraco, has pseudobranchiae. The ventral fins 

 are never close together, as in the Trachinidar, and Uranoscopidae. 



I. Gill-inembi-anes free or nai-rowly attached to the isthmus. 



A. Dorsal formed of two portions, which may be united at the base. 



1. Two lateral lines, the lower of which may be confined to the caudal 



region ; palate toothless. 



a. Body covered with ctenoid scales ; teeth in several series ; snout 



not spatulate. 

 o. Anterior dorsal formed of slender, flexible rays. 



Scapular foramen in scapular bone Trematomus, g. n. 



Scapular foramen between scapula and coracoid Notothenia, Eich. 



^. Anterior dorsal formed of sliort, pun- 

 gent spines Macronofothen, Gill .* 



b. Body covered with very small cycloid 



scales ; teeth in a single series ; snout 



not spatulate Dissostichus, Smitt.* 



c. Body naked ; snout spatulate. 



Lateral line with granulated plates Chaenichthys, Rich. 



Lateral line without plates Gham/pRocephalns, Gill. 



2. Three lateral lines ; body naked ; snout spatu- 



late ; palate toothless Cryodraco,T>o\\o* 



3. A single lateral line. 



a. Body scaly. 



Teeth on vomer and palatines; head armed Gentropercis, Ogilby.* 



Teeth on vomer and palatines ; opercle with a flat spine... Pseudaphritis, Casteln. 



Teeth on vomer only ; a praeorbital spine Acanthaphritis, Gthr. 



Palate toothless Eleginops, Gill. 



b. Body naked; habit cottoid; opercle 



strongly armed Bovichthys, C. liv: V. 



B. A single dorsal ; snout long and flattened ; palate toothless. 



1. Two lateral lines. 



a. Body naked ; opercle armed. 



Lateral lines without bony pi ates Oymnodraco, g. n . 



Lateral lines with bony plates ParacJiaenicMhys,^.n*'^ 



b. Body covered with extremely small 



scales; no opercular spines Gerlachia, DoWo* 



2. Lateral line single; body covered with ex- 



tremely small scales. 



No opercular spines Bathydraco, Gthr, 



Opercular spines Bacovitzaia, DoUo.*^ 



IL Gill-membranes broadly united to the isthmus ; habit 



cottoid ; body naked ; head armed ; palate toothless Harpagifer, Rich. 



The genus Pagetodus, Rich., rests on an insufficient description and figure. 



' Based on GliaenicMhys georgianus, Fischei', from South Georgia Island. 

 ^ The distinctive characters of these genera liave unfortunately been inverted in 

 the synopsis given in Ann. and Mag. N. H. (7) viii. 1901, p. 266. 



