206 



Annals of the Carnegie Museum. 



be safe under natural conditions (30-60 mm. long), they are sold to the 

 Chinese farmers. Usually, at the end of one year they grow to the 

 length of 150-160 mm. According to the Chinese breeders' informa- 

 tion this fish never spawns in Formosa. 



AcROSSOCHEiLUS gen. nov. 

 Type Gymnostomus formosanus Regan. 



Body elongate, compressed; head smooth, with many mucous 

 cavities around the eye; snout obtuse, its tip not i^rojecting beyond 

 the upper lip, without lateral lobe. Mouth inferior, transverse; upper 

 lip fleshy, not fringed; lower lip thick, not continuous, distinct at the 

 side of the mouth only; upper jaw projecting beyond the longer; 

 anterior edge of the lower jaw sharp and naked. Four barbels, two 

 maxillary and two rostral. Dorsal fin without osseous ray, with not 

 more than nine rays, opposite the ventral; anal fin rather short, with 

 five divided rays. Scales moderate, about forty in the lateral line; 

 lateral line running along the middle of the tail. Pharyngeal teeth 

 5, 3, 2-2, 3, 5. 



Distribution: Formosa; China. 



Remarks: The present genus is very closely related to Crossocheilus 

 Van Hasselt. Four barbels and smooth upper lip are the character- 

 istics of Acrossocheilus, which distinguish it from the latter. 



19. Acrossocheilus formosanus (Regan). 

 Chopicn or Choppan (Formosa). 



1908. Gymnostomus formosanus Regan, Ann. Mag. Nat. Hist. (8), I, p. 140; 



Lake Candidius, Formosa. 

 1908. Gymnostomus labiatiis Regan, Ann. Mag. Nat. Hist. (8), H, p. 358; Lake 



Candidius, Formosa. 



Head 4 in length; depth 4; D. 3, 8; A. 3. 5; P. 14; \'. t); width of 

 head 1.8 in its length; interorbital space 3 in head; snout 2.5; eye 5; 

 pectoral 1.16; ventral 1.25; forty scales in a longitudinal series, five 

 and one-half in a transverse series from origin of dorsal to lateral line^ 



