234 Proceedings of the Royal Physical Socvety. 
Family NATIcID&. 
Natica, Natica alderi, Forbes. 
Adanson. 
Natica alderi, Forb., Mal. Mon., p. 31, pl. ii., figs. 6 and 7. 
,,  nitida, F, and H., vol. iii., p. 330, pl. c., figs. 2-4; and (animal) 
pl. PP., fig. 5 as NV. alderi. 
,,  alderi, Jeff., loc. cit., vol. iv., p. 224; vol. v., pl. lxxviii., 
fig. 5. 
Rare. This species appears to be of frequent occurrence 
in the raised beaches around our coasts. 
As a living species it is found everywhere from the extreme 
verge of low-water mark to the greatest depth within the line 
of soundings. 
Family SoLARIDA. 
Adeorbis, Adeorbis subcarinatus (Montagu). Pl. VIII, figs. 1-3. 
Searles Wood. 
1803. Helix subcarinata, Mont., Test. Brit., p. 438, t. 7, fig. 9. 
ide "i Turton, Brit. Fauna, p. 187. 
1817. Trochus rugosus, Brown, Wernerian Mem., ii., p. 520, pl. xxiv., 
fig. 5. 
1845. »  subcarinatus, Brown, Rec. Conch. of Gt. Brit. and 
Ireland, 2nd edit., p. 18, pl. xi, figs. 
30, 31. 
1853. Adcorbis subcarinatus, F. and H., vol. ii., p. 541, pl. Ixviii., - 
figs. 6-8. 
DBGOs 9) io 7 Jeff., Joc. cit., vol. iv., p. 231; vol. v., 
pl, lxxix;; fig... 
Rare. One specimen only of this well-marked species was 
obtained in the material from Fillyside, collected by Mr James 
Jennie in 1869, and, as far as we know, this is the first record 
of its occurrence in Scotland as a fossil. Searles Wood 
records it from the Red and Coralline Crag; it has also been 
recorded from the Belgian Tertiaries, and from one or two 
other places on the Continent. 
As a living species Adeorbis subearinatus is by no means 
rare, and has been obtained in several places on the coasts 
of England and Ireland. In Scotland it has been taken in 
Lamlash Bay, Arran, and on the coast of Aberdeenshire. It 
is recorded from various localities on the south and south- 
western coasts of Kurope. 
