404 Binney— On Polyporites. 
4, Another tooth of Dithyrocaris, from the Lower Marine series, 
Campsie. 
4 a. Upper view of same. , 
5 & 5a. Side- and upper view of another specimen, from Orchard 
Quarry. 
6, Fragment of the fore-part of a carapace of Dithyrocaris, showing the 
under-surface, with portions of the two ‘molar’ teeth (a, 6) seen 
in sit. From Lickprivick Quarry, Kast Kilbride. 
7,7a,&7b. Magnified views of the outer and inner sides and the 
erinding surface of jaws of Apus. Recent from Bohemia. 
8. Fac-simile of General Portlock’s figure of teeth of Dithyrocaris, in 
_ the Geol. of Londonderry, pl. xii. fig. 6. 
9. Dithyrocaris Scouleri, M‘Coy, Carb. Foss. Ireland, pl. xxiii. fig. 2. 
10. Apus cancriformis, sp. Recent from Bohemia (nat. size). 
11. Ditto. Enlarged view of under-side to show jaws in place (@ a). 
12. Gastric teeth of common Lobster, Homarus astacus. 
13. Upper molar teeth (right side) of a young Kangaroo, from Australia. 
13 a. Lower ditto Cis) ditto. 
13 6 & c. Detached teeth of (6) upper and (c) lower jaw of same. 
III. Remarks ON THE GENUS POLYPORITES. 
By E. W. Binney, F.RB.S. 
LANES and Hutton, in their ‘ Fossil Flora’ (vol. i. p. 181), 
give a plate and description of some specimens, termed by 
them Polyporites Bowmanni, which were found by the late Mr. J. E. 
Bowman, F.L.S., in the Carboniferous strata, near the entrance of 
the Vale of Llangollen, in the county of Denbigh. 
In the notes on the first specimen no doubts are expressed as to the 
nature of the fossil; but with respect to the second specimen, the 
authors say, ‘It is a matter of great doubt whether this really be- 
longs to the vegetable kingdom. Mr. Bowman remarks that his 
second specimen might be taken for the scale of a Fish, or of some 
great Saurian Reptile; and we admit it now without daring to offer 
any decided opinion about it, chiefly on account of its resemblance, 
in some respects, to some cellular plants of the present era.’ 
Some twenty-five years ago, Mr. Bowman showed me both the spe- 
cimens, and I immediately recognized them to be scales of the genus 
Holoptychius, since changed to Rhizodus; and that gentleman was 
of the same opinion, and stated to me that he always had doubts as 
to the vegetable nature of the fossils. Probably I should not have 
taken any notice of these mistaken fossils; but in looking over 
M. Adolphe Brongniart’s excellent work, ‘Tableau des Genres de 
Végétaux fossiles considérés sous le point de vue de leur classification 
botanique et de leur distribution géologique,’ I noticed that, at 
page 6, in speaking of the ‘Famille des Champignons, he says, 
‘MM. Lindley et Hutton, dans leur Fossil Flora, ont désigné sous 
le nom de Polyporites Bowmanni un fossile quwils comparent, quoi- 
qu’avec doute, 4 un Polyporus, et qui provient des mines des houilles 
du pays de Galles. J’ai observé une empreinte analogue dans les 
échantillons du terrain houiller de Sardaigne, et qui ne parait pas 
