THE AMERICAN TETRAGONOPTERINAE. 185 
Specimens examined. 
Number of 
Catalogue number specimens Size in mm. Locality Collector 
1190 C. Type 1 35 Gluck Island Eigenmann 
1191 C., 11768 I. 25 19-38 Gluck Island Eigenmann 
Paratypes 
1192 C. Paratype 1 34 Rockstone Eigenmann 
3078 C. 2 24-34 Bastos Haseman 
Head 3.33-3.67; depth 2.75; D.11; A. 26 or 27; scales 5-31 to 33-3; 
eye 2.5 in head; interorbital almost equal to the eye, 2.6 in the head. 
Compressed; depth of head at base of occipital process 1.5 in the greatest 
depth. Preventral regions without complete series of median scales. Pre- 
dorsal region rounded, without complete series of median scales, slightly keeled. 
Occipital process about 5 in the distance from its base to the dorsal, bor- 
dered by 3 scales. Interorbital somewhat convex; frontal fontanel triangular, 
as wide as the parietal and almost equal to the length of the parietal without 
the occipital groove. Second suborbital leaving a narrow naked margin behind 
but not below; third suborbital very small. Maxillary equal to the eye. Man- 
dible longer than the eye, 2+ inthe head. Snout short, mouth large. Premaxil- 
lary with two or three narrow tricuspid teeth in the outer row and six to eight 
small tricuspid and conical teeth in the inner row. The two rows of premaxil- 
lary teeth not so far apart as in most species of the genus. Maxillary with four 
to six very small narrowly tricuspid or conical teeth. Dentary with a graduated 
series of five 3- to 5-pointed teeth followed by about eight minute teeth on the 
sides. 
Gill-rakers 8 + 12. 
Anal sheath short, composed of 4 or 5 scales covering the base of the first 
7 or 8 anal rays. Lateral line with pores developed on 6 or 7 scales. 
Origin of dorsal about half the length of the eye nearer to the snout than 
to the caudal, the penultimate ray almost one third of the longest which is 
3 to 3.5 in the length. Caudal equal to the head. Origin of the anal on verti- 
cal from the middle dorsal ray; anal emarginate, the longest ray 1.5-2 in the 
base, rays very close together. Ventrals on the vertical from the first scale 
in front of the dorsal. Ventrals just reaching the first or second anal rays. 
Pectorals reaching a little beyond the base of the ventrals. 
Humeral and caudal spots lacking. Scales of the back outlined with dusky. 
The entire sides, except over the body-cavity, with scattered chromatophores 
