292 MEMOIRS OF THE CARNEGIE MUSEUM 



Type, 39 mm. Gluck Island. (Carnegie Museum Catalog of Fishes No. 

 1156.) 



Cotype, 37 mm. Cluck Island. (I. U. Cat. No. 11683.) 



Resembling Ammocry/iln pellucida. 



Head 4.33; depth 7; D. 11 ; A. 8; scales 3-36-2, nine in front of dorsal. Eye 

 a little longer than snout, 3.75 in head; bony interorbital a little less than half 

 the length of head. Teeth with three large points. 



Pectorals reaching ventrals, the outer rays not thickened; ventrals not to 

 anal; anal rounded, the third ray reaching a little beyond tip of last, but not nearly 

 to caudal; dorsal truncate the third ray reaching a little beyond middle of last; 

 base of dorsal 6.75 in the length, equal to one-half its distance from tip of adipose. 



Pellucid in life. Middle of sides with twenty-seven to thirty stellate chromato- 

 phores, one or more of which may have slipped up or down from the line of the 

 rest; a few smaller cells dorsad of the lateral series; back with about sixteen cross- 

 bars, which do not encroach on the sides. A dark band forward from eye to end 

 of snout. Upper part of cheek and opercle each with a chromatophore; top of 

 head with a few chromatophores; ventral parts clear, except for a patch of chromato- 

 phores between the pectorals, one between the ventrals, and a patch at origin of 

 anal; a dark median line between tip of ventral and another behind the anal 

 fin. A dark band about two-thirds up on the dorsal and one across base of the 

 anterior rays, both very faint; caudal with a few faint dark spots; fins otherwise 

 hyaline. 



150. Characidium pteroides Eigenmann. (Plate XXXIX, figs. 6, 7.) 



Characidium pteroides Eigenmann, Ann. Carnegie Mus., VI, 1909, 40; Repts. 

 Princeton Univ. Exp. Patagonia, III, 1910, 428. 

 Type, 28 mm. Konawaruk. (Carnegie Museum Catalog of Fishes No. 



1157.) 



Cotypes, two specimens, 25-27 mm. Konawaruk. (I. U. Cat. No. 11684.) 

 Cotype, one specimen, 23 mm. Rockstone. (C. M. Cat. No. 1158.) 

 Cotype, one specimen, 24 mm. Wismar. (I. U. Cat. No. 11685.) 

 A characin which burrows in the sand, very similar to C. pellucidum. 

 Head 4; depth 6; D. 11; A. 7; scales 4-36-2. Eye considerably longer than 



snout, a little over 3 in the head; teeth three-pointed. 



Pectorals about reaching ventrals, the tips of their outer rays not thickened ; 



ventrals not nearly to anal; anal rounded, not nearly reaching the caudal fulcra. 



Third dorsal ray reaching about to second third of the last; base of dorsal 1.3 in 



its distance from the adipose, 6 in the length. 



