1911.] NATURAL SCIENCES OF PHILADELPHIA. 515 



little before last fourth in space between dorsal origin and caudal 

 base, fin less than half way to latter. Anal inserted behind depressed 

 dorsal tip, first to third branched rays subequally longest, fin If to 

 caudal base, lower edge rounded. Caudal broad, slightly emargi- 

 nated, upper lobe a little longer than lower. Pectoral broad, rounded, 

 ly 7 to ventral, and upper rays longest. Ventral inserted a little 

 before dorsal origin, fin If to anal origin. Vent close before anal. 



Color in alcohol rich umber-brown on back, becoming paler on 

 sides below and lower regions, where largely whitish. From occiput 

 along each side of back to end of upper surface of caudal peduncle 

 a broad dusky to blackish band, this well separated from an inferior 

 lower similar band. This latter narrow, rather ill-defined, extends 

 back from eye across opercle along middle of side and becomes more 

 or less obsolete after anal. It seems to be obscurely broken up into 

 a number of blackish blotches, of which one above anal base and 

 another below adipose fin most distinct. A narrow dusky-black 

 vertical bar at caudal base. Almost all of scales along side below 

 with a gilt or golden blotch at inner basal region, and these fading 

 out after being in alcohol some time. Head brownish above, sides 

 paler, with lower surface whitish. Lips both deep brown, maxillary 

 but little paler. Tongue largely pale, front edge dusky. Inside 

 gill-opening pale. Iris brownish. Dorsal grayish. Caudal pale 

 olivaceous-brown. Other fins all pale or whitish. Peritoneum 

 silvery-white. 



Length 6 T \ inches. 



Type, No. 31. Collection S. N. Rhoads. Affluent of the Chimbo 

 River, near Bucay, Province of Guayas, Ecuador. July, 1911. 



This species differs from Piabucina astrigata Regan, and in fact 

 all the others in the genus by its coloration. 



(Aureus, golden; gutta, spot; with reference to the coloration.) 



CICHLID^]. 

 iEquidens azurifer sp. nov. Fig. 7. 



Head 2f; depth 2f; D. XIV, 11; A. Ill, 9, i; P. i, 13; V. I, 5; 



scales 16 in upper branch of 1. 1., 9 in lower branch; 4 scales between 

 spinous dorsal origin and 1. 1.; 2 scales between rayed dorsal origin 

 and 1. 1.; 6 scales obliquely back from anal origin to beginning of 

 lower branch of 1. 1.; 9 predorsal scales; head width If its length; 

 head depth at occiput 1; snout 2f ; eye 5|; maxillary 3yo; inter- 

 orbital 2|; mandible 2* ; fourth dorsal spine 3 ? ; tenth dorsal spine 

 3; fourteenth dorsal spine 2f ; sixth branched dorsal ray If; third 



