The Raised Sea-Bottom of Fillyside. 223 
Leda pygmea (Miinster). —_ . 
chumeacnher. 
Nucula pygmea (Minster), Goldfuss, Petref., p. 157, t. cxxv., fig. 17. 
Leda pygnvea, F. and H., vol. ii., p. 230, pl. xlvii., fig. 10. 
' Be Jeff. , Joc. cit., vol. ii., p. 154; vol. v., pl. xxix,, fig. 5. 
Rare. This species has been obtained in a fossil condition 
in the Post-Pliocene clays of the Clyde beds, at Montrose, 
Elie, and Errol, ete. 
In its living state it appears to be very local in its habit. 
Leda minuta (Muller). 
Arca minuta, Muller, Prodr. Zool. Dan., p. 247, No. 2985. 
Leda caudata, F, and H., vol. ii., p. 226, pl. xlvii., figs. 11-13. 
», minuta, Jeff., loc. cit., vol. li., p. 155; vol. v., pl. xxix., fig. 6. 
Rare. Its fossil distribution in Scotland appears to be 
more limited than Z. pygmea, and has been recorded from 
Elie and Errol, and from the boulder clay at Caithness. 
On the west coast it has been obtained from the deposit at 
Bute. It has been recorded from the estuarine clays at 
Belfast in Ireland. 
Family KELLiip. 
Lepton nitidum, Turton. Lepton, 
; Turton. 
Lepton nitidum, Turt., Conch. Dith., p. 63. 
Kellia nitida, F. and H., vol. ii., p. 92, pl. xxxvi., figs. 3 and 4; 
and (LZ. nitidum), Appendix IV., p. 225. 
Lepton nitidum, Jeff., loc. cit., vol. ii., p. 198; vol. v., pl. xxxi,, fig. 3. 
Frequent. As a Post-Tertiary fossil this species has been 
found in the clays at Garvel Park, Greenock; it also occurs 
as a Coralline Crag fossil. 
In a living state it is not uncommon on the British coasts. 
Montacuta bidentata (Montagu). Montacuta, 
Turton. 
Mya bidentata, Mont., Test. Brit., p. 44, t. 26, fig. 5. 
Montacuta bidentata, F. and H., vol. ii., p. 75, pl. xviii., figs. 6 and 6a. 
= a Jeff., doc. cit., vol. ii. 
Frequent. Asa fossil it has been found in the marine 
accumulations at Largo, Fifeshire; in the Clyde beds at 
