50. LEuciscus. 223 



r'-u. Adult : skeletons. Holland. Purchased of Mr. Damon. 



v' . Adult : skull. Lake of Constance. From Dr. A. Giinther's 



Collection. 



Hybrid between Leuciscus dobula and Alburnus lucidus. 



Leuciscus dolabratiis, Holandre, Tannedu DepaH. de la Moselle, 1836, 



p. 248 ; Cuv. S,- Val. x\n. p. 248 ; Giinth. Fishe d. Neckars, p. 90. 

 Leuciscus (Squalius) dolabratus, fSelys-Longch. Faun. Beige, p. 207, 



pi. 5. fio;. 5. 

 Abraniis d.obuloides, Giinth. Wiirtemb. ntr%v. Jahresh. 1857, p. 50, 



taf. 2. 

 Alburnus tauricus, Kessler, Bull. Soc. Nat. Mosc. 1859, xxxii. p. 5.34. 

 dolabratus, iSicbold, Siissivasserf. p. 164. figs. 23 & 24 ; Jiickel, 



Ahhandl. zool.-niuwr. Ver. Ref/cnsb. 1865, p. 41. 

 Alburnus dobuloides, Jeitteles, Fische d. March, ii. 1864, p. 8. 



D. 11. A. 13-16. V. 9-11. L. lat. 45-54. L. transv. ^^ 

 Vert. 22/21. 



Body rather elongate, its oep& being one-fourth or somewhat 

 less than one-fourth, of the total length (witbowt caudal) Snout 

 as long as, or rather longer than, the eye ; cleft of the mouth mo- 

 derately oblique, the jaws being even in front, or the lower rather 

 the longer. The abdomen is slightly compressed behind the ven- 

 trals, the scales reaching across the keel. There are three longi^ 

 tudinal series of scales between the lateral line and ventral fin. The 

 origin of the anal fin is behind the end of the dorsal. Scales of 

 adult examples with a dark margin. 



This hybrid appears to occur in all localities inhabited by Al- 

 bumus liicidus and L. dobula. 



a. Adult. River Mole. Presented by W. T. Tegetmeier, Esq. 



b. Adult. River Neckar. Presented by Dr. A. GUnther. — A. 



dobuloides. 



c. Adult. River Neckar. From the Stuttgart Collection. 



d-e. Large example (11 inches) and half-grown. River Amper, 



Bavaria. From i)r. Gemminger's Collection. 

 /. Adult. Olmiitz. From Hr. Jeitteles's Collection. 

 g. Adult : skeleton. Neckar. From Dr. A. Giinther's Collection. 



15. Leuciscus pyrenaicus. 



Escalo (Portugal). 



? Leuciscus cephalus, Steindachner, Sitzgsber. Ak. Wiss. Wien, 1866, 

 liv. pp. 18, 262. 



D. 11. A. 11 (12). V. 10. L. lat. 42-44. L. transv. 8/6. 



Vert. 40. 

 The height of the body equals the length of the head, and is one- 

 fourth of the total (without caudal). Head rather broad, the width 

 of the interorbital space being contained twice and two-thirds in the 

 length of the head. The diameter of the eye is less than the extent 

 of the snout, and contained four times and two-thirds in the length 

 of the head, and once and two-thirds in the width of the interorbital 



