364 FIELD MUSEUM OF NATURAL HISTORY ZOOLOGY, VOL. X. 



90. Microeleotrls mindii sp. nov. 



Type No. 8954, F. M. N. H.; length 55 mm.; Mindi, Canal Zone, 

 Panama. 



Head 3.2 to 3.5; depth 4.83 to 6.68; D. VI-I, 9; A. I, 9; scales 30 to 



32- 



Body anteriorly depressed; caudal peduncle compressed; head low, 

 wider than deep, the width at preopercular margin 1.45 to 1.75 in its 

 length; snout broad, 3.25 to 4 in head; eye superior, 3.7 to 4.65; inter- 

 orbital very narrow, 8.65 to 12; mouth rather large, oblique; lower jaw 

 strongly projecting; maxillary scarcely reaching opposite middle of eye, 

 2.17 to 2.6 in head; teeth all small, pointed, in bands in the jaws; gill- 

 membranes narrowly attached to the isthmus, the openings extending 

 forward to nearly under posterior margin of eye; scales large, ctenoid; 

 head, predorsal region, chest and median line of abdomen naked; 7 rows 

 between base of second dorsal and base of anal; origin of first dorsal 

 about midway between tip of snout and base of last ray of second dorsal, 

 the spines weak, reaching second dorsal; origin of second dorsal a little 

 in advance of origin of anal, the rays short; caudal fin without small 

 scales on base, the margin rounded; anal fin similar to second dorsal; 

 ventral fins short, failing to reach vent, inserted under base of pectorals; 

 pectoral fins moderate, reaching past tips of ventrals, 1.13 to 1.5 in head. 



Color olivaceous; the back with 4 dark saddle-like blotches; median 

 line of sides with elongate dark blotches; a small caudal spot present. 

 Dorsals and caudal with indistinct dark bars or spots; anal fin with 

 more or less dusky, other fins unmarked. 



We have 51 specimens of this species, ranging from 30 to 56 mm. in 

 length. These were taken in a brackish creek at Mindi near the Atlan- 

 tic coast of the Canal Zone. 



This species differs from M. panamensis in the somewhat less strongly 

 depressed body, narrower interorbital, fewer scales in the lateral series, 

 one more ray each in the second dorsal and anal, and in the lighter 

 coloration. 



A specimen 55 mm. in length has been designated as the type. 



55. Hemieleotris gen. nov. 



Type Ekotris latifasciatus Meek & Hildebrand, Field Mus. Nat. Hist. 



Pub., Zool. Ser., X, 1912, 68. 



Body elongate, compressed; head compressed, not flat above, mostly 

 covered with scales, the upper surface from eyes forward naked; mouth 

 moderate, oblique; lower jaw projecting; no preopercular spine; teeth 

 small, in bands on the jaws, none on vomer; gill-openings extending 



