24 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 63 



Gill-opening forward opposite hind eye edge. No gill-rakers. 

 Pseudobranchiae about three-fifths of gill filaments, which are 1^ 

 in eye. 



Scales mostly fallen, in even longitudinal rows. Caudal scaly 

 basally, other fins naked. Head naked. Scales with 19 to 25 basal 

 marginal striae, of which 2 to 6 are incomplete. Lateral line com- 

 plete, slopes down behind depressed pectoral midway along side, 

 arch 2f in horizontal section. Tubes in lateral line simple, rather 

 large, each well exposed. 



Dorsal spines all flexible." First dorsal spine inserted over middle 

 of opercle and with succeeding 5 all separated, without membranes, 

 and of uniform height; other dorsal spines uniform and scarcely 

 distinguished from dorsal rays of soft fin. Anal begins little before 

 origin of second spinous dorsal or one connected by membranes, 

 fin edge little more notched. Caudal elongate, median rays longest 

 and forming point behind. Pectoral large, pointed. Ventral in- 

 serted before first spinous dorsal, reaches anal. 



Color in alcohol pale brownish, evidently little paler below. Back 

 and upper surface of head finely specked with obscure brown dots 

 or small blotches, these also on dorsals and caudal. Along back 

 traces of about 12 small dark-edged saddles. Two pale lines extend 

 from eye, one backward and other more inclined in same direction. 



Length 87 mm. 



Type— C^t, No. 83315, U.S.N.M., Valparaiso, Chile. Wilkes Ex- 

 ploring, Expedition. 



Also Cat. No. 83099, U.S.N.M., paratype, same data. It shows: 

 Head 4-1- ; depth 7; D. VI-XX, 22; A. II, 39; scales 33-|-6+31 in 

 lateral line to caudal base and 2 more in latter; snout 7^ in head 

 from upper jaw tip; eye 6|; maxillary 3|; head width 2f ; length 

 68 mm. 



This species is related to G. semicinctus Gilbert, from the Gulf of 

 California and Florida, but differs in its more slender body and in- 

 creased scales and fin rays. Probably Dactyloscopus zelote^ Jordan 

 and Evermann is also a Gillellus, as it is described with " dorsal 

 beginning in the nape, its distance from snout about equaling depth 

 of body, the first 6 rays shorter than those following and not con- 

 nected by membrane ; as no traces of articulation can be found, they 

 are probably flexible spines, but are not clearly differentiated from 

 those immediately following." As D. zelotes has been set aside as the 

 type for the nominal subgenus Esloscopus Jordan and Evermann, 

 probably the latter had best be merged with Gillellus rather than 

 with Dactyloscopus. 



{Australh^i southern.) 



