1862.] DR. A. GiJNTHER ON THE BRITISH CHARRS. 4/ 



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. 



Descrijition of a male specimen, length 1 1 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, subcorneal, 

 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 maxillary 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- 



