THE AMERICAN TETRAGONOPTERINAE. 145 
without the occipital groove. Second suborbital leaving a narrow naked 
margin behind and below. Snout short; mouth moderately large. Maxil- 
lary 1.33 in the eye. Mandible equal to the eye, 2.5 in head, much weaker 
than the upper jaw. Width of naked area of the cheek 4 in the eye. Pre- 
maxillary with five 3- to 5-pointed teeth in the inner row, and two or three 
narrow tricuspid teeth in the outer row. Maxillary with two to four, 3- to 
5-pointed teeth. Dentary with four or five, 5- to 7-pointed teeth in a 
graduated series, followed by seven or eight minute tricuspid and conical teeth 
on the sides. 
Gill-rakers 8 + 6. 
Anal sheath short, of three scales covering the bases of the first five anal 
rays. Caudal scaled over the basal one fourth. Lateral line with pores on 
six to nine scales. 
Origin of dorsal equidistant from the snout and caudal, penultimate ray 
one third the longest which is 3.67 in the length. Origin of the anal on the 
vertical from the last dorsal ray. Anal deeply emarginate, longest ray 1.25 
in the length of the base. Caudal equal to the length of the head. Ventral 
on the vertical from the second scale in front of the dorsal. Ventrals just 
reaching the first or second anal rays. Pectorals reaching the first scale in 
front of ventrals. 
No true humeral spot; pores and margins of the first three or four scales 
in the lateral line heavily outlined with dusky and a group of large chromato- 
phores just behind the eye on the head give the appearance of a humeral spot. 
Web of distal half of dorsal, almost all of the caudal, all of the ventrals, pec- 
torals, and the web between the first seven anal rays dusky. Often a faint 
little dark spot at the base of each caudal lobe, no true caudal spot. Scales 
of the back and upper one third of the sides outlined with dusky. A broad 
stripe without chromatophores cherry-red in life, extends from the head to the 
caudal and halfway to the end of the middle caudal rays. Below this lateral 
stripe a dusky stripe two scales in width extends the length of the body. The 
belly and a streak on the sides, from just above the bases of the anterior ten 
anal rays to the mandible, without chromatophores. Bases of the anal and 
under side of the caudal peduncle black to dusky. Lips dusky. Dorsal lobe 
and upper part of the iris cherry-red in life. 
