ADDENDA 105. CHIRID.E HEXAGRAMMUS. 
949 
on vomer or palatines; tongue verj" slender, sharp; opercles nnarined. 
Gill-openings very wide, the membranes narrowly joined to the isthmus 
on the median line. No lateral line. Branchiostegals 5. Dorsals sej)- 
arate; the first of 6 very slender, flexible spines; the second elongate, 
similar to the anal; caudal long and pointed, free from dorsal and anal; 
ventrals close together, separate, each of one spine and four rays, their 
insertion below or behind pectorals; anal i>apilla present, [loq, dart; 
yXuxTaa^ tongue.) A remarkable tj'pe, belonging to the Oxymeto2)ontin(r., 
differing widely from our other Gobioid fishes. 
996 (ft). I. callitirus Bean. 
Light olive, without distinct markings (in spirits); tip of first dorsal 
dusky; caudal apparently with a median reddish strii)e and two bluish 
bands. Head not crested, its upper surface gently rounded; maxillary 
extending to opposite front of pupil, 2^ in head; upper jaw with about 
2 series of teeth, the outer enlarged; 2 curved canines behind the baud; 
lower jaw with about 1 row of smaller teeth, besides about 4 canines. 
Eye large, twice length of snout, 3^ in head. Gill rakers long and 
slender. Dorsal fins contiguous, the longest spine filamentous, about 
as long as head; caudal lanceolate, half as long as rest of body; ven- 
trals inserted very slightly in advance of pectorals, nearly as long as 
head. Scales minute, mostly cycloid. Head 5; depth 7^. D. yi-22; 
A. I, 21. L. 4 inches. Deep water otf Pensacola, Fla. 
(Bean, Proc. U. S. Nat. Mus. 1882, 419; Jordan & Gilbert, Proc. U. S. Nat. Mns. 
1882, 297.) 
Page 642. Hexagrammus ordinatus is a typical Hexagrammns, having 
the dorsal fin divided. The genus Pleurogrammus should probably be 
adopted for H. monopterygius, which is, in Alaska, one of the most im- 
portant food-fishes, according to Dr. Bean. 
Page 644. Dr. Beau considers our suggestion, that Hexagrammus 
scaher is the young of II. aspet'j as improbable. The following are the 
characters assigned to the former species : 
999 (5). H. scal>or Bean. 
Light brown, silvery below ; each dorsal with 3 dark blotches, smaller 
than eye, not reaching base of hn; pectorals, ventrals, and anal immao 
ulate. Teeth on jaws and vomer; none on palatines. A tentacle above 
eye. Six lateral lines on each side; the supplemental one faint, extend- 
ing backward from above base of ])ectoral, disappearing near middle of 
body. Scales everywhere very rough. Caudal forked; dorsal deeply 
