44 
characters are as in G. Zaddachi: Chela of p2 (but not of p 1 ; 
see above); the proportion between the inner ramus and 1. joint 
of the outer ramus is as 5 : 6. The side-plate (1. joint) of p4. — 
In addition, the second joint of p5 has the hind corner almost rect- 
angular, not produced. 
A specimen taken off Raaby Kær (the mouth of the fjord) 6 m, 
salinity 23 %o, has up3 as in G. Zadd. (Sexton 1912, PI. 74, 
fig. 11), but the inner ramus is a little narrower and longer than 
drawn by Sexton; in all other respects, however, it corresponds 
with G. lociisla. 
In a spec. 15 mm) from the bridge at Mellerup (6 miles 
inside the mouth) 0—0.2 m, salinity 6 %o, the inner ramus of up3 
is a little more than half as long as the outer ramus. 
Thus it may be seen that many of the specimens from Randers 
fjord combine the characters for G. locusla and G. Zaddachi (— 
also the big G. locusta (No. 2) from the Kara Sea combines the 
„specific“ characters —) in such a manner that it must be taken 
for granted, that G. Zaddachi is merely a variety of G. locusta ; 
therefore I propose the name G. locusta L. var. Zaddachi Sexton. 
Localities see p. 49. 
Gammarus Duebenii Lilljb. 
Gammarus Duebenii Sars, Account, vol. 1, 1895, p. 502, PI. 177, 
fig. 1. 
— — Stebbing, Amphip., Tierreich 1906, p. 473 
(lit. and. syn.). 
locusta var. C. Hoek, 1. c. 1889, p. 219, PI. 10, fig. 13, 13 h 
This species differs from the others by the supply of siender 
hairs on the dorsal surface of the urosome and on p5—p7 and on 
the telson; p5-—p7 are also less siender than in the other species. 
4 spec., 12—15 mm, were found off Mellerup (6 miles from the 
mouth of the fjord) at the surface, and 2 (^, 16—17 mm (depth 
0—0.4 m) on the stone-reef abt. 3 miles from the mouth; the sali¬ 
nity being 5—13 Voo. The species is new to Denmark, but has 
