NOTES ON FRESH—WATER SPONGES 
FROM THE VOLGA—BASIN. 
Kirkpatrick. 
Recently Dr. A. Behning, Direcktor of the Volga Biolo¬ 
gical Station at Saratow sent to the Natural History Museum, 
London, nine specimens of fresh—water Sponges collected in 
the Jeruslan and Samara rivers, tributaries of the Volga, seven 
examples from the former: Soljana Kuba (9.ix.13 and l0.ix.13), 
Jeruslan at the Bjelaja Kuba (I2.ix. 13), Jeruslan at Michailofka 
(I2.ix.18), Bjelaja Kuba (I2.ix.13), and а „Liman“ at Michai- 
lofka (l0.ix.13), and two from the latter: Samara at Totzkoje 
(27.П and 12.УП.13). 
The specimens, which apparently all come within the limits 
ofEphydatia mülleri Lieberkühn may be arranged in 
two groups. One, from Jeruslan at Bjelaja Kuba, Jeruslan at 
Michailofka and Bjelaja Kuba, is identical with E. mülleri 
Form A. Dybowski, all the others belonging to а new variety 
which I. propose to call Ephydatia mülleri var. b e- 
h n i n g i nov. 
EPHYDATIA MÜLLERI (L1EBERKÜHH), 
1856. Spongilla mülleri Lieberkühn. Arch. Anat. u. 
Phys. 1856 p. 510. PI. xv fig. 30. 
1882. Meyenia №2 and Meyenia N 2 3 vars, a. ß, Dy¬ 
bowski. Mem. Acad. Imp. Sei. St.-Petersbourg 
(Ser yn) Tom 30 №16 pp. 15—20 Pis. I— Ш Figs 
1, 2, 5, 8, 11. 
1883 ( 1 ). Ephydatia mülleri Forma A, Forma B’ 
& var astrodiscus Vejdovsky. Abhand. Kj 
Böhmisch Ges. Wiss. Prag. Folge VI, Bd. XI 1 
№ 5. pp. 26—31. 
1883 ( 2 ) Ephydatia amphizona Vejdovsky. Sitzungsb. K. Böh¬ 
misch Ges. Wiss. Prag. 1883 p. 331. PI. Fig. 1,2. 
