JORDAN AND THOMPSON: FISHES OBTAINED IN JAPAN IN 1911. 219 



anal similar; caudal dark; paired fins clear; peritoneum black; pharyngeal teeth 

 with pigmented covering save on grinding surfaces. 



The males of this species differ in no way from the females, save in a darker 

 belly and the presence of tubercles on the snout, and in two patches which are 

 separated from the large tuberculated area before the eyes by a deep fold. The 

 extent of the patches is larger than in most of the other species, but very variable 

 according to the breeding season. 

 49. Acheilognathus longipinnis Regan. 



Acheilognathus longipinnis Regan, Ann. Mag. Nat. Hist., 1905, p. 364; Lake Biwa (Yamasabu River), 

 Nagoya. 



Nos. 6418a-b, Nagoya. 



The following is a description of five specimens, four of them males, the longest 

 87 mm. in total length, from Lake Biwa, at Matsubara, collected by Dr. Jordan in 

 1911: 



Depth 2.16 in body-length to base of caudal; D. Ill, 15; A. II, 14 or 15; scales 

 in lateral line 36, in transverse series 6/6 (between insertions of vertical fins); 

 pharyngeal teeth 5-5. 



Head 4 in body-length; snout 4 in head, very short in appearance and with its 

 dorsal profile strongly arched; dorsal profile of head depressed at occiput; caudal 

 peduncle short, its length from last anal ray to last vertebra equal to length of head 

 without snout, or 1.4 in head; its depth 2 in head; tip of the premaxillaries at, or 

 below, the level of the lower edge of the pupil; mouth more oblique than usual, due 

 to the short snout; eye longer than snout, 3 in head; barbel absent; gill-rakers 3-f-13 

 on first arch, comparatively long, and not much shorter anteriorly than posteriorly ; 

 pharyngeal teeth plicate transversely on the lower lateral surface of each tooth, the 

 narrow grinding edge not serrate, tip hooked. 



Dorsal fin inserted midway between tip of snout and base of caudal peduncle; 

 third and longest dorsal ray 1.1 in head; margin of fin straight or slightly rounded, 

 its base 2.86 in body-length; anal fin inserted under fifth or sixth dorsal ray, its 

 margin somewhat falcate, its base 3.5 in body-length, its last ray reaching half the 

 distance between its own base and that of the first caudal rays; pectorals reaching 

 base of ventrals, equal to length of caudal peduncle; ventrals extending slightly 

 beyond first anal ray, their length contained 1.33 in head. 



Color of specimens preserved in formalin very pale, somewhat darker above the 

 lateral line, especially in the case of the female, the line of back darkest; no lateral 

 stripe, or shoulder spot; dorsal fin with two black lines running longitudinally along 

 the center of the fin, alternating with pale lines, the margins of the fins in the males 



