O. G. Dely szerk.: Vertebrata Hungarica 2/1-2. (Budapest, 1960)

Berinkey, L.: Ichtyological notes 1 11-18. o.

/15/, listing its occurrence at Komárom and Zimcny, writes, on the authority of HERMAN /5/,as Pollowe: „In Duna rarissime occurrit etiam ad Komárom". Four specimens from the Danube had been preserved in the ICHTHYOLOGICAL COLLECTION OF THE NATURAL HISTORY MUSEUM, originating from the following localities: Apatin, November 1916, 1 specimen, leg. :E.UNGER - G3nyii, 24 September 1934. 1 specimen, leg.:E. DUDICH;Budapest

, the upper end of the Margit Island, 27 October 1957, 1 specimen, leg.: L. FURIA; Budapest, the upper end cf the Margit Island, October 1957, 1 specimen, leg.: F.

SOMOGYI. It is interesting to note that all collecting data originate from the autumn /September-November/. That the bullhead is not as rare in the Danube as is shown also by the above data, and that its successful collecting in this river depends on special water levels in accordance with the habits of the species, is further substantiated by ths collectings made at the time of the extraordinarily low water levels during the autumn of 1959 and the early spring of I960. During these few months, 41 specimens were collected in the reach of the Danube between Vác and Budapest, in the small watery pits along the shore and under stones.The data of theee specimens are as follows: Budapest, Hajógyár Island, 15 Oct.

1959,2 spec.leg.:V.WOLSKY. Vác, 22 Oct. 1959, 3 spec, leg.: J.KATKOVICS. Vác, 24-25 Nov. 1959. 1 spec, leg.: J.MATKOVICS. Vác, 7-11 Dec. 1959, 26 spec, leg.: J.MATKOVICS. Vác, 24-25 March I960, 2 spec, leg.: J.MATKOVICS. Vác, 22 April I960, 7 spec, leg.: J.MATKOVICS. On the basis of mass collectings like the above ones, one may conclude that the occurrence in the Danube of this species is not a rarity, but rather a low water leve) suitable for its capture is only seldom met with.