91. SCI^NID^ HAPLOIDONOTUS. 
567 
€c. Teeth feeble, permanent in upper jaw only; anal spines small. 
Liostomus, 297. 
hb. Lower jaw with several minute barbels. 
d. Preoiiercle with its membranaceous margin crenulate. 
Genyonemus, 298. 
dd. Preopercle with its bony margin serrate Micropogon, 299. 
hbb. Lower jaw with a single thickish barbel. 
€. Air-bladder present; anal spines 2 Umbrixa, 300. 
ee. Air-bladder none ; anal spine single Mexticirrus, 301. 
tt Lower jaw projecting beyond upper. 
/. Snout short, blunt ; no canines; anal fin very smal ; soft part of 
dorsal much longer than spinous part Larimus, 302. 
tt. Vertebra} about 14 -f 10 ; body elongate ; lower jaw ijrojecting. (OtoUthinw.) 
h. Canine teeth none Atractosciox, 303. 
M. Canines two (or one) in upper jaw only Ca'nosciox, 304. 
** Dorsals remote ; the second about as large as the anal. {Isopisthincc.) 
i. Lower jaw projecting; anal spines feeble; teeth small, 
shari), in narrow bauds Seripuus, 305. 
294.— HAPLOIDONOTUS Eafiuesque. 
Fresh-water Brums. 
{Amhlodon Eafiuesque.) 
{Aplodinotus Eafiuesque, Jouru. de Phjs. 1819,418: type ApJodinotus grunniens Eaf.) 
Body oblong, the snout blunt, the back elevated and compressed. 
Mouth rather small, low, horizontal, the lower jaw included. Teeth 
in villiform bands, the outer scarcely enlarged. ISlo barbels. Pseudo- 
branchite rather small; gill-rakers short and blunt. Lower itharyn- 
geals very large, fully united, with coarse, blunt, paved teeth. Preop- 
ercle slightly serrate. Dorsal spines strong and high, with a close fit- 
ting scaly sheath at base, the two dorsals somewhat connected. Second 
anal spine very strong. Caudal double-truncate. Fresh waters of the 
United States. (drrAmc, a cloak; back; according to Gill, from 
the scaly base of the dorsal fin.) 
« 
§93. II. ga’MiaBaieBas Eaf. — Sheepshead; Thunder-pumper; Drum; White Perch; 
Croaker. 
Grayish silvery, dusky above, sometimes quite dark, the back some- 
times with oblique dusky streaks along the rows of scales. Scales rather 
thin, adherent, smaller on the back and belly. Second anal spine more 
than half the length of the head. Snout very blunt, overlapping the 
mouth. Eye large. Head 3^; depth nearly 3. D. IX-I, 30 ; A. II, 7 ; 
Lat. 1. 55. Great Lakes to Texas, abundant, reaching a weight of 50 to 
