_ Prof. T. Rupert Jones—Ostracoda from Nova Scotia. 269 
one attempts to draw such—how could the line in that case reach on 
the Salcombe estuary a position, which is considerably to the north 
of a line drawn due west from Hall Sands? 
In connection, also, with the suggestion, that the chloritic rock 
near the fault-line was a “ buffer, checking the northward spread of 
metamorphism,” ! I should like to ask, why was this duty neglected 
by the much larger and more extensive mass near Prawle Point, 
and that overlooking The Barr?—to the northward of which, in 
both cases, lie well-marked mica-schists. I might take exception to 
many other statements, but I should not be justified in thus occupying 
space, for they are matters of detail, compared with the suggested 
identification of the two series of rocks. These may have some 
resemblance to each other—though I should have thought it so 
superficial as not to mislead any practised observer; but even if 
there be a vague resemblance, due to their having had the same 
origin, they cannot, as I have shown, have been manufactured at 
the same epoch. 
VII.—On some OsrracopA FRoM THE Maxpou Coat-FIELD, INVERNESS 
Co., Care Breton (Nova Scotia). 
By Prof. T. Rupzrt Jonzs, F.R.S., and J. W. Kirxsy, Hsq. 
HIRTEEN specimens of black shale, crowded with Ostracoda, 
besides fish-scales, Anthracomye (?), and other small fossils, 
were sent in 1886 by Mr. J. F. Whiteaves, F.G.S8., Paleeontologist of 
the Geological Survey of Canada, for examination. They had been 
collected by Mr. A. H. Foord, F.G.S., of that Survey, in 1881. 
In these coal-shales the Ostracoda are very numerous as indi- 
viduals, but belong apparently to very few species of one genus. 
They are in a great degree similar to those mentioned in the Gxot. 
Mag. Dee. II. Vol. VIII. 1881, p. 95, and Dec. III. Vol. I. 1884, p. 
308, etc., as occurring in the black coal-shales of the South Joggins, 
Nova Scotia. 
In the Mabou coal-fields we find :— 
1. Carbonia fabulina, J. and K., very abundant. It is of rather 
smaller size than the Scottish forms figured and described in the 
Ann. Mag. Nat. Hist. ser. 5, vol. iv. (1879), p. 81, pl. 2, figs. 1-10. 
The innumerable minute Ostracoda imbedded throughout the shale 
seem to be small individuals of C. fabulina. 
2. Among the foregoing is a variety larger than the Scotch speci- 
mens referred to, rather more oblong in outline, and with stronger 
marginal overlap, and a somewhat coarser punctation of the surface. 
It may be termed var. altilis (well-nourished). 
3. Carbonia (?) bairdioides, J. and K., also occurs, but far less 
abundantly than C. fabulina. The specimens more closely resemble 
fig. 24, pl. 3, “A. M. N. H.” ser. 5, vol. iv. p. 38, than fig. 8, pl. 12 
of the Gro. Mae., Dec. III. Vol. I. p. 359. 
Carbonia fabulina is abundant in the Upper and the Lower Carbon- 
iferous formations of Britain, wherever the conditions had been 
1 Trans. Dev. Assoc. 1888, vol. xx. p. 217. 
