83. KASBORICHTHTS. 319 



the branchial membrane to the isthmus takes place below the hind 

 margin of the orbit. Pharjnigeal teeth varying in number, some- 

 times in a single, sometimes in a double series, hooked. Belly behind 

 the Tcntrals compressed into an edge. 

 South-eastern and Central Europe. 



1. Leucaspius dellneatns. 



Squalius delineatus, Heeled, in Riissegger'' s Eeisen, i. p. 1041 ; Heck. 



Sf Kner, Siisswasserf. p. 193. fig. 107. 

 ? Leuciscus styniphalicus, Cuv. i^- Val. xvii. p. 295, pi. 498. 

 Aspius owsianka, Czernay, Bull. &ic. Nat. Muse. 1850, xxiii. p. G34, 



xxiv. p. 281, tab. 7,& p. 259; Maslmcski, ibid. 1854, xxvii. p. 442; 



Kesskr, ibid. 1856, xxix. p. 375 ; 1857, xxx. p. 473. 

 Leucaspius abruptus, Heek. %■ Kner, Siisswasserf. p. 145. fig. 76. 

 Owsianka czeniayi, Di/botcski, Cyprin. Livl. p. 140. 

 Leucaspius delineatus, Siebold, Siissicasserf. p. 172. 



D. 11. A. 14-17. V. 9-10. L.lat. 48. L. transv. 1.5. 

 The anal fin commences somewhat in advance of the vertical from 

 the last dorsal ray. A silvery band along the side of body and tail. 

 South-eastern and Central Europe. Three inches long. 



a-c. Adult. Eiver Ocker, near Brunswick. Presented by Prof, von 

 Siebold. 



83. EASBORICHTHYS. 



Rasborichthys, Bleek. Prodr. Cypr. p. 456. 



Scales small ; lateral line running along the middle of the tail. 

 Dorsal fin with seven branched rays, situated above the space be- 

 tween ventrals and anal ; anal many-rayed. Mouth oblique, anterior, 

 narrow, not extending to below tbe eye, which is large, immediately 

 below the upper profile, and provided with broad adipose eyelids. 

 Barbels none. Suborbitals very narrow. Gill-rakers long, setiform, 

 closely set ; pseudobranehiae. Pharyngeal teeth 5.3. 1 — 1 .3.5, 

 knife-shaped. 



Borneo. 



1. Rasborichthys helfrichii. 



Leuciscus helfrichii, Bleek. Act. Sue. Sc. Keerl. ii. Borneo, x. p. l.?. 

 Rasboiichthvs helfrichii, Bkek. Prodr. Ci/pr. p. 4.56 ; or Atl. Ichthuol. 

 Cypr. p. 128, tab. 22. fig. 3. 



D. 9. A. 21. L. lat. 55. L. transv. 10/9. 



Five series of scales between the lateral line and the ventral fins. 

 The end of the dorsal fin is before the commencement of the anal. 

 Tlie height of the body is nearly equal to the length of the head, 

 which is two-ninths of the total (without caudal). Coloration uni- 

 form, with an indistinct silvery band along the side. 



Borneo. 



a. One of the t}-pical specimens. Kahajan. From Dr. Bleeker's Col- 

 lection. 



