LYCODID^E. 



537 



Crenicichla. — Body low, sub-cylindrical; scales small or 

 rather small. The spinous portion of the dorsal is much more 

 developed than the soft, both being continuous, and not separated 

 by a notch ; anal spines three. Praeopercular margin serrated. 

 Each jaw with a band of conical teeth. The outer branchial 

 arch with short tubercles. Dorsal and anal fins naked. 



Ten species from Brazil and Guyana. 



The following genera complete the list of South American 

 Chromides : Chmtobranchus, Mesops, Satanoperca, Geoplmgus, 

 Symphysodon, and Ptcrophyllum. 



THIKD OKDER— ANACANTHINI. 



Vertical and ventral fins ivithout spinous rays. The ventral 

 fins, if present, are jugular or thoracic. Air-bladder, if present, 

 without pneumatic duct. 



These characters are common to all the members of this 

 order, with the exception of a freshwater-fish from Tasmania 

 and South Australia {Gadopsis), which has the anterior por- 

 tion of the dorsal and anal fins formed of spines. 



First Division — Anacanthini Gadoidei. 

 Head and hody symmctrieally formed. 



First Family — Lycodid^. 



Vertical fins confiuent. Ventral fin, if present, small, 

 attached to the humercd arch, jugular. Gill-opening narrow, 

 the gill-memibrcme hcing attached to the isthmus. 



Marine littoral fishes of small size, resembling Blennies, 

 chiefly represented in high latitudes, but a few living within 

 the tropical zone. 



Lycodes. — Body elongate, covered with minute scales im- 

 bedded in the skin, or naked ; lateral line more or less indistinct. 

 Eye of moderate size. Ventral small, short, rudimentary, jugular, 



