HETEROLEPIDOTID^. 



491 



notufi {sctigerus) from Indian Seas, with some of the anterior 

 dorsal rays prolonged into fila- 

 ments ; and Hcmerocodcs (acan- 

 thorJiynchus) from New Zealand, 

 and sometimes found far out at 

 sea on the surface. 



Third Family — Hetero- 

 lepidotid.e. 



Bochj obloiiq, compressed, scaly ; 



"^ ^' ^ -^ pjg_ 222.— Scale from tlie lateral 



eyes lateral; cleft of the mouth ^^e of Hemeroccetes acantho- 



lateral ; dentition feeble. The i-iiynchus, with lacerated margin. 

 angle of the prwopercidttm connected hy a hony stay 'with the 

 infraorbital ring. Dorsal long, toith the spinous and soft por- 

 tions equcdly developed; anal elongate. Vcntrals thoracic, loith 

 one spine and five rays. 



Fig. 223. — CIdriLS hexagrainmus, from Japan. 



Small shore-fishes, characteristic of the fauna of the 

 Northern Pacific, some of the species occurring on the American 

 as well as Asiatic side. They have been referred to several 

 genera, as 



Chirus, which is distinguished by the presence of several 

 lateral lines ; 



Ophiodon, Avitli one lateral line only, cycloid scales, and 

 slightly armed prteoperculum ; 



Agrammus, with one lateral line only, ctenoid scales, and 

 unarmed prseoperculum ; and 



Zaniolepis, with one lateral line and minute comb-like scales. 



