7 x 8

West, Newman & Co. it'

Dermal tubercles (granicones) & teeth (Nuthetes destructor).

JOURNAL

OF THE

ROYAL MICROSCOPICAL SOCIETY.

NOVEMBER, 1878.

I.-On the Fossils called " Granicones"; being a Contribution to the Histology of the Exo-skeleton in “Reptilia.”

By Professor OWEN, C.B., F.R.S., F.R.M.S., &c.
(Read before the ROYAL MICROSCOPICAL SOCIETY, October 9, 1878.)
PLATES XII. AND XIII,

THE British Museum lately acquired, by purchase, the collection of fossils made by Samuel H. Beckles, Esq., F.R.S, F.G.S., in the "Feather-Bed Stratum," Middle Purbecks, Dorsetshire.

The mammalian remains had previously been submitted to me by their discoverer for determination and description, and they form the subject of the preliminary chapter of my work on 'Marsupial Fossils."

In working out the residuary slabs and pieces of matrix from the above-named formation, some interesting additional evidences of the Reptilia of the period were brought to light, and among them the bodies figured in Plate XII., Figs. 1-5, natural size, to

EXPLANATION OF THE PLATES.

PLATE XII.

FIGS. 1-3.-Granicones of the larger size.

FIG. 4.-A granicone showing an oblique base.

5.

with a beaded border at the base, the apex broken off. 6.-Transverse section of a granicone; nat. size in outline, and magnified 2 diameters.

7.—The portion indicated by the circular line in Fig. 6; magnified about

8 diameters.

8.-Portion of jaw and teeth in situ, Nuthetes destructor; nat. size.
9.-Detached teeth of the same species; nat. size.

10.-Portion of section of a granicone; magnified about 333 diameters.

FIG. 1.-Outline of a scute of Theriosuchus pusillus; nat. size.

PLATE XIII.

2. Two scutes of do.; magnified 2 diameters.

3. A section of scute; magnified about 33 diameters.
4.-A section of scute; magnified about 333 diameters.

*Researches on the Fossil Remains of the Extinct Mammals of Australia, with a Notice of the Extinct Marsupials of England,' 4to, 1877, vol. i. pp. 21-104.

VOL. I.

S