83. EASBORICHTHYS. 319 



the branchial membrane to the isthmus takes place below the hind 

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

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

 the ventrals compressed into an edge. 

 South-eastern and Central Europe. 



1. Leucaspius delineatns. 



Squaliiis delineatus, Jlcckel, in Rxisxe.fi(jei-''s llcisen, i. p. 1041 ; Heck. 



8f Kner, Siisstoasserf. p. 193. fig. 107. 

 ? Leuciscus stymphalicus, Cuv. ^ Val. xvii. p. 295, pi. 498. 

 Aspius owsianka, Czemmj, Bull. Soc. Nat. Mosc. 1850, xxiii. p. 634, 



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



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

 Ijeucaspius abruptus, Heck. Sf Kner, Siisszoasscrf. p. 145. fig. 76. 

 Owsianka czernayi, Dyhoivski, Cyprin. Livl. p. 146. 

 Leucaspius delineatus, Siebold, Siisstvasserf. p. 172. 



D. 11. A. 14-17. V. 9-10. L.lat 48. L. transv. 15. 

 The anal fin commences somewhat in advance of the vertical from 

 the last dorsal ra}^ A silvery band along the side of bodj' and tail. 

 South-eastern and Central Europe. Three inches long. 



a-c. Adult. River Ocker, near Bruns%nck. Presented by Prof, von 

 Siebold. 



83. RASBORICHTHYS. 



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



Scales smaU ; 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 the 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 ; pseudobranchise. Pharyngeal teeth 5.3. 1 — 1 .3.5, 

 knife-shaped. 



Borneo. 



1. Easborichthys helfrichii. 



Leuciscua belfrichii, Bleek. Act. Soc. Sc. Neerl. ii. Botmeo, x. p. 15. 

 Rasborichthys helfricbii, Bleek. Prod?: Cypr. p. 456 ; or Atl. Ichthyol. 

 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. 

 The 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 typical specimens. Kahajan. From Dr. Bleekcr's Col- 

 lection. 



