MISCELLANEA. iltsyi 
Fig. 8. Dorsal view of the same species, x 40. 
Fig. 9. Ventral view of the same species, x 40. 
Fig. 10. A fragment of the valves of the same species to show their struc- 
ture, and the mixed clothing of hairs and spines, x 200. 
Fig. 11. Cypris punctillata (Norman), left valve, x 20. 
Fig. 12. The same species seen from above, x 20. 
Fig. 13. The same species seen from below, x 20. 
Fig. 14. A fragment of the valves of the same species to show their struc- 
ture and the clothing of hairs, x 100. 
Fig. 15. Cythere contorta (Norman), right valve, x 40. 
XXVIU.—Miscellaneous Notices and Observations. 
On the occurrence of Alderia modesta near Sunderland.— 
About a week ago, while collecting Hntomostraca in a salt 
marsh near Hylton, I gathered several specimens of a nudi- 
branchiate mollusc, the species of which I could not determine. 
Mr. Alder, to whom I forwarded the specimens, pronounces them 
to belong to Alderia modesta, and adds, ‘‘ I am delighted to find 
it an inhabitant of our district. It is one of the rarest British 
species, having been found only in the south of Ireland, and 
south of Wales, and always in brackish water or salt marshes. 
I hope you will be able to send us living specimens to examine, 
and for Mr. Hancock to make drawings from.’ The Hylton 
specimens were, when taken, of a dull greyish green colour, but 
this tint speedily faded on the animals being put into preserva- 
tive fluid. Dilute spirit discharged the colour less than Goadby’s 
solution.—George S. Brady, Sunderland, Sep., 1861. 
Spongilla fluviatilis—The occurrence of this fresh water 
sponge in our immediate neighbourhood is, perhaps, worth record. 
I found it abundantly in a deep pool near the Don, a little to the 
west of Brockley Whins Station. The stones at the bottom, as 
well as the stems of rushes, were in many places, completely 
covered with it. It must, I think, be scarce in our district, 
as after a deal of fishing in fresh-water, I have not observed it in 
any other locality.—Jbid. 
