The Ancient Lake of Elie. 159 
AQUATIC. 
Class CONCHIFERA. 
Order LAMELLIBRANCHIATA. 
Family SPHARIIDA. 
Pisidium fontinale (Draparnaud). Pisidium, 
C. Pfeiffer. 
Cyclas fontinalis, Drap., Hist. Moll., 130, pl. x., figs. 8-12. 
Pisidium henslowianwm (var. without appendages), Jenyns, Ann. Nat. 
Hist., Aug. 1858, p. 104. 
5s fontinale, Jeffreys, Brit. Conchology, vol. i., p. 20; vol. v., 
pl. i. (supplementary), fig. 6. 
“ », Roebuck, Census of Scottish Land and Fresh- 
Water Mollusca, in Proceedings of the Royal 
Physical Society, 1889-90, p. 495. 
This species was obtained in the material from three of 
the deposits mentioned in the preceding lists, the only 
deposit in which it was not observed was that exposed on 
the Harbour Road. It also occurred in some of the deposits 
described in the paper on “The Ancient Lakes of Edin- 
burgh.” } 
As a living species, Pisidium fontinale appears to be 
widely distributed over Scotland. It is recorded from sixteen 
counties in the “Census,” and we have it from some other 
localities on the west coast, besides that already recorded 
therein. 
Pisidium pusillum (Gmelin). 
T'cllina pusilla, Gmel., Syst. Nat., p. 3231. 
Pisidiwm pusillum, F. and H., vol. ii., p. 123, pl. xxxvii., fig. 10, 
and animal pl. O, fig. 9. 
es . Jeff., op. cit., vol. i., p. 23; vol. v., pl. 1 (suppl.), 
; fig. 7. 
>. Roebuck, op. cit., p. 496. 
This species appears to be of more frequent occurrence in 
the lake deposits than the last, and we obtained it in all the 
localities mentioned in these notes, as well as in some of the 
deposits described in previous papers. 
1 Proc. Roy. Phys. Soc. Edin., vol. x., part i., pp. 126-154 (1889). 
