246 Ii. Etheridge, Jun. — Contributions to British Palceontology . 
Edinburghshire. Mr. C. W. Peach bas collected A. Scotica frora 
sbale above tbe Burdiehouse Limestone at Straiton Oil-sbale Mines, 
near Burdiehouse, and from sbale interbedded witb trap on Inch- 
lceith Island, Firth of Forth. Mr. J. Bennie has obtained tbe 
species at numerous localities in tbe oil-sbale ground to tbe west of 
Edinburgh, including Straiton Oil-sbale Mine, and I bave found 
it at tbe first quarry east of tbe Binn Hill, Burntisland, Fife. 
It was communicated to me by Mr. J. Linn, from sbale obtained 
at Middleton Pit, Uphall, Edinburghshire. These localities are all 
in the Cement-stone Group, near tbe horizon of tbe Burdiehouse 
Limestone. Botb Mr. J. Henderson (Edinb. Geological Society) 
and Mr. Bennie bave found it sparingly in a lower horizon of tbe 
Cement-stone Group than tbe Burdiehouse Limestone, viz. the 
Wardie sbales, in tbe Water of Leitb, at Kates-mill, near Edinburgh. 
Genus Sanguinolites, M Cov, 1844. (Synopsis Carb. Foss. Ireland, 
p. 47 ; Brit. Pal. Foss. p. 276.) 
Sanguinolites ? Abdenensis, sp. nov. ? Plate XII. Figs. 9-11. 
Sp. Chars. — Transversely elongated ; two and a half times as long 
as bigb. Anterior side short, rounded ; posterior side produced, 
inargin subtruncate in its upper part, rounded below. Dorsal 
and ventral margin almost parallel, tbe former long and straight, 
tbe latter witb a very little sballow sinus in it a little posterior to 
tbe umbones ; tbe latter are anterior. Diagonal ridge faintly marked ; 
posterior slope scarcely defined from tbe body of tbe shell. Surface 
ornamented witb concentric lines parallel to tbe margins, whicli 
leave little or no trace on the posterior slope of casts. 
Obs. — I bave provisionally given the above name to a shell wbicb 
bas been found in considerable quantities, at one locality, always as 
casts. Its generic affinities are doubtful, but I refer it to Sanguinolites 
partly from its general form, and also because there is an indication 
of an inflected hinge-margin. S. ? Abdenensis appears to be allied to 
S. angustatus, Phill., 1 but uniformly differs in size, and possesses 
a shorter anterior end, whilst tbe posterior slope, altliough usually 
smootb in tbe casts, now and tben exhibits tbe remains of concentric 
striae passing across it. Tbe shell also appears to bave some affinity 
witb Sanguinolites discors, M'Coy ; 2 but in addition to being dis- 
tinguished by the previously mentioned cbaracters, the much 
straigbter ventral margin of our shell may be noticed, and tbe 
much coarser and more regulär marking in S. discors, so far as an 
opinion can be formed from casts only. S. Abdenensis is at first 
sight not unlike S. plicatus, Portlock, 3 more especially M‘Coy’s 
figure of the latter. 4 However, our shell is more transversely 
elongated, and is not so bigb a shell in proportion to its length as 
S. plicatus, and there is no trace of tbe sharp angle formed by tbe 
junction of tbe posterior and dorsal margins. Tbe great abundance 
1 Geol. York., 1856, vol. ii. p. 208, t. 5, f. 2. 
2 Synop. Carb. Foss. Ireland, 1841, p. 49, t. 8. f. 4. 
3 Geol. Report, Lord., 1843, p. 433, t. 34, f. 18. 
4 l.c. p. 49, t. 10, f. 3 a and b. 
