
y 
LOWER CARBONIFEROUS ROCKS OF THE FIFESHIRE COAST. 393 
Dr FLEminG, to whom I formerly submitted this shell, considered it to be the 
Anatina attenuata of M‘Coy, but held that it had been erroneously referred to 
that genus. He possessed numerous specimens from a bed near Colinton, where 
it occurs in such abundance as to suggest the idea of its having been gregarious; 
but the specimens from Fife were in better preservation, and he intended to 
have them laid open and submit them to a careful examination, in order to deter- 
mine the generic character. Circumstances prevented this, but it has now been 
made clear by Mr Satter. The species seems to have belonged properly to the 
Lower Carboniferous group, rather than to the Mountain Limestone. It is common 
enough, indeed, in the bed F, to be characteristic of the stratum; but when met 
with in the lower rocks, it shows itself in a far different way, and in far greater 
abundance. This is seen not only at Colinton, but in a very remarkable bed 
south-east of Kingsbarns, where, in countless masses, it covers the surface of the 
rock in a state of preservation singularly fresh and beautiful. On passing up into 
the Mountain Limestone it occurs rather in a straggling condition, and in com- 
paratively scanty numbers. 
Passing to the five overlying beds, besides most of the shells just enumerated, 
_we find the following :— 

1. Athyris ambigua. 12. Athyris gibera. 
2. Athyris Royssii. 13. Productus longispina. 
3. Chonetes Hardrensis. 14. Rhynconella pleurodon. 
4, Chonetes variolata. 15. Spirifer duplicicosta, 
5. Discina nitida, 16, Spirifer trigonalis. 
6. Leptaena crenistria. 17. Avicula rugosa. 
7. Productus giganteus. 18. Aviculopecten interstrialis, 
8. Productus punctatus. 19. Mytilus triangularis. 
9. Orthis Michelini. 20. Nucula tumida. 
10. Orthis filiaria. 21. Euomphalus carbonarius. 
11. Orthis resupinata. 22. Orthoceras annulare. 
Along with these there occur species of Schizodus, Aviculopecten, Modiola, and 
Turbo, not determined. There is also one species of Sanguinolites, which Mr 
SALTER pronounces to be new. 
Crustaceans.—The bed B east of St Monan’s has yielded various specimens 
of a species of trilobite—the Grifithides mucronatus; and in the bed E, near 
Kinghorn, I found a plate of the Eurypterus Hibberte. 
It is the bed F at Ardross, however, which has proved most productive of 
these remains. They are of two kinds. First, Those belonging to the genus 
Dithyrocaris, chiefly detached valves; one specimen, however, showing distinctly 
the tail spines, and another the jaws. Mr Sauter, whose authority stands so 
high in regard to this class of fossils, has decided that the specimens belong to 
two species both hitherto undescribed. 
The other crustaceans are of a form nearly allied to the shrimp, and closely 
‘resemble the species of Gampsonyx, described by Von Meyer, from the coal for- 
VOL. XXII. PART II. D1 
