1862.] DR. A. GUNTHER ON THE BRITISH CHARRS. 47 
Head compressed ; interorbital space convex, its width being less than 
twice the diameter of the eye. Jaws of the male of equal length 
anteriorly ; teeth of moderate strength, four in each intermaxillary, 
twenty in the maxillary. Length of the pectoral less than that of 
the head, much more than one-half of the distance between its root 
and that of the ventral. Dorsal rays twelve. 165 transverse series 
of scales above the lateral line. Sides with red dots; belly red; 
pectoral, ventral, and anal with white margins. 
Description of a male specimen, length 11 inches 2 lines. —Head 
and body compressed, slightly elevated; its greatest depth is below 
the origin of the dorsal fin, where it is contained four times in the 
total length (to the end of the middle caudal rays). The least depth 
of the tail equals the length of the base of the dorsal fin. The 
height of the head above the mandibulary joint equals the distance 
between the posterior margin of the orbit and the end of the oper- 
culum. The upper profile of the head is somewhat elevated above 
the margin of the orbit, the diameter of which is nearly one-fifth of 
the length of the head, shorter than the snout, and more than one- 
half of the width of the interorbital space; the latter is very di- 
stinctly convex, with a rather prominent ridge along the middle, and 
with a pair of series of pores. Snout slightly compressed, subconical, 
with the jaws equal anteriorly. The nostrils are situated imme- 
diately before the eye ; the posterior is the wider, and the cutaneous 
bridge between both is not developed in a flap. The mazillary ex- 
tends scarcely beyond the vertical from the posterior margin of the 
eye, and is armed with 20-21 teeth of moderate size; four teeth in 
the intermaxillary, seventeen in each mandible, two pairs on the 
vomer, fifteen on each palatine bone, and four pairs on the tongue. 
The suboperculum forms the hindmost part of the gill-cover, and 
does not cover the exposed portion of the humerus above the root of 
the pectoral; its vertical width is rather less than one-half of that of 
the operculum, therefore it is comparatively narrow. Nearly all the 
branchiostegals are situated at the side of the head, and exposed in 
a lateral view of the fish. The lower branch of the outer branchial 
arch is provided with eleven lanceolate, slightly curved gill-rakers ; 
the longest is less than two lines long in the specimen described. 
D.12. A.12. P. 13-14. V. 9-10. 
The origin of the dorsal fin is exactly in the middle between the 
snout and the root of the caudal ; the length of its base is equal to the 
length of the last ray, and contained once and three-fourths in that 
of the fourth. The fourth and fifth rays form an acute point, and 
the upper margin of the fin is straight. The first ray is rudimentary, 
the second half as long as the third, the third three-fifths of the 
fourth, the fourth simple, the fifth branched, fourth and fifth longest, 
the last split to the base. The distance of the adipous fin from the 
dorsal is equal to twice and a third the base of the latter. 
The origin of the anal fin is exactly in the middle between the 
root of the caudal and that of the outer ventral ray ; the length of 
its base equals that of the dorsal, and is contained once and two- 
