2348 Bulletin 4.7, United States National Museum. 



p'. Lateral line obsolete, only the row of pores being 



present. BRYOSTEMMA, 901. 



oo'. Ventral fins rudimentary or wanting, not more tban 



1 soft ray present; dorsal spines all short and rigid. 



PHOLIDIN^E : 



q'. Lateral line obsolete. 



r 1 . Gill membranes broadly united, free 

 from the isthmus ; no pyloric caeca; 

 carnivorous. 

 *'. Anal fin with a large sheathed 



spine ; ventrals wanting. 

 V. Anal spine very long, pen- 

 shaped, its anterior sur- 

 face channelled; pectoral 

 fins moderate. 



APODICHTHTS, 902. 

 W. Anal spine moderate or small, 

 not pen-shaped, its ante- 

 rior edge convex, not 

 channelled. 



u'. Pectoral fins very small; 



anal spine moderate. 



XEBERPES, 903. 



uu 1 . Pectoral fins wholly 



wanting ; anal 



spine small. 



ULVICOLA, 904. 

 S8'. Anal fin with 2 small spines or 



with none. 



v'. Ventral fins reduced to a 

 short spine, followed by 

 a rudimentary ray. 

 w 1 . Caudal fin well de- 

 veloped. 



PHOLIS, 905. 



ww'. Caudal fin very nar- 

 row, the dorsal 

 and anal united 

 around the taper- 

 ing tail. 



GUNNELLOPS, 906. 



vv'. Ventral fins entirely want- 

 ing; caudal as in Pholis. 



ASTERNOPTERYX, 907. 



rr 1 . Gill membranes joined to the isthmus, 

 sometimes forming a fold across it; 

 no ventral fins; no anal spines; 

 top of head with fleshy crests; 

 pyloric caeca present; body naked 

 anteriorly, with small scales pos- 

 teriorly. ANOPLARCHUS, 908. 

 XIPHIDIIN.E: 



qq'. Lateral lines several, each with many short 

 cross branches; pyloric caeca present; 

 gill membranes free from isthmus ; ven- 

 trals none; anal spines 2 or 3, small; 

 herbivorous. 



