67. RHODEus. 27y 



6. Achilognathus rhombeus. 



Capoeta rhoinbea, Schley. Faun. Japan. 2'uiss. p. 205, pi. 100. Hg. (5. 

 Acneilognathus rhombeus, Bleeker, Vijpr. Prudr. p. 225 (name only). 

 Paracheilognathus rhombeus, Bleeker, All. Ichthyol. Ci/pr. p. 33 

 (name oul} ). 



D. 15-lG. A. 12-13. L. Int. 37. L. transv. 0/7. 



Barbels minute. The height of the body is two-fifths of the total 

 length (without caudal). The last dorsal raj is opposite to the 

 seventh of the anal fin. Pharyngeal teeth serrated. There are five 

 longitudinal series of scales between the lateral line and the root oi' 

 the ventral fin. A narrow bluish band along the side of the body. 



Japan. 



(/. One of the typical specimens. From the Leyden Museum. 



67. RHODEUS. 

 Rhodeus, Agassiz, Mhn. Soc. Hist. Nat. Neuchdt. 1835, i. p. 37. 



Scales of moderate size ; lateral line incomplete, only on the 

 anterior part of the trunk. Dorsal fin with from nine to twelve 

 branched rays, extending from the ventrals to beyond the origin of 

 the anal. Anal fin rather elongate, with about twelve rays. Mouth 

 subinferior, small, arched; lower jaw^ without labial fold. Barbels 

 none. Gill-rakers very short; pseudobranchia?. Pharyngeal teeth 

 5 — 5, compressed, not denticulated, the bevelled surface with a simple 

 groove. 



Male, during the spawning-season, with tubercles on the snout, 

 and the female with a long external urogenital tube. 



Central Europe ; China. 



1. Rhodeus amarus. 



Der Bitterling. La Bouviere. 



Duhamel, Peches, ii. p. 514, pi. 26. fig. 5. 



Cyprinus amarus, Block, Fische Deiitschl. p. 52, tab. 8. fig. 3 ; Cuv. 

 if Val. xvii. p. 79. 



sericeus, Pallas, Zoogr. p. 320. 



Rhodeus amarus, Agassiz, Mem. Soc, Sc. Nat. Neuchdtel, i. 1835, 

 p. 37; or in Wiegm. Arch. 1838, p. 78; Nordmann, in Demidoff 

 Voy. Puss. Merid. m. p. 481 ; Selys-Longchantps, Faun. Beige, 

 p. 201; Heckel 8) Kner, Silsswasserf. p. 100. figs. 52 & 53; 

 Krauss, in Wiirtemb. ntrw. Jahreshefte, 1858, p. 115; Fritsch, in 

 Lotos, Zeitschrift etc. ix. 1859, p. 201 ; Siebold, Siisswasserf. p. 116, 

 pl. 1 ; Dyboivski, Cypr, Livland. p. 83 ; Jeitteles, Fische (l. March, 

 li. 1864, p. .3 ; Jdckel, in Ahhandl. zool.-)nineral. Vereins z. Pegensb. 

 1864, p. 30 ; Blanckard, Poiss. France, p. 346. 



D. 12. A. 12. L. lat. 34-38. L. transv. 10-12. Yert. 18/16-17. 

 The height of the body is, in males, rather less than one-third 

 or three-eighths of the total length (without caudal), in females 

 two-fifths, the length of the head a little less than one-fourth. The 

 third suborbital bone is half as wide as the orbit. A bluish- sih-ery 

 band along the middle of the tail. 



