G18 SUPPLEMENTARY NOTES. 
APPENDIX. 
P. 73, 1. 25. I learn from Mr. Pentland, that the head of a 
species of Dasyurus as large as, and closely allied to, D. Cyno- 
cephalus (Thylacinus Harrisii) of Van Diemen's Land, has been 
recently discovered in the Eocene Fresh-water limestone of Au- 
vergne. The Thylacinus is the largest of the carnivorous mar- 
supial animals, being of the size of a wolf, but having shorter legs ; 
it is the only living species of this genus, and is found only in 
Van Diemen's Land. 
P. 166, Note. In the Tertiary formations we have fossil frogs, 
tadpoles, and salamanders, in the Papier Kohle near Bonn (see 
P. 509, Note, and P. 514, Note, 1. 26), and fossil Snakes in the 
Fresh-water strata of Clermont, in Auvergne. 
P. 331. It is shown in a notice read by M. Voltz to the 
Natural History Society at Strasbourg, December 6, 1836, that 
the problematical fossils known by the name of Aptychus,Trigo- 
nellites, &c. which are sometimes found lodged in pairs within the 
first chamber of Ammonites, were Opercula connected vv'ith the 
foot, or organ by which the animals inhabiting these shells moved 
along the bottom of the sea. (L'lnstitut, February 8, 1837.) The 
form of the dense coriaceous foot of the Pearly Nautilus figured 
by Mr. Owen in his Plate 3, Fig. 1, (See our Supp. Note, P. 
608), resembles that of the valves of several species of Aptychus; 
but it has no shelly appendage. 
P. 473, 1. 27. Further important communications respecting 
Sigillaria have recently been published in the 11th and 12th 
Livraisons of M. Adolphe Brongniart's Vegetaux Fossiles, 1836; 
in the details of which he points out the relations of these abun- 
dant and curious fossil plants of the coal formation to arborescent 
Ferns, in a manner that justifies the place he originally assigned 
to them in the family of Ferns. 
END OF VOL. I. 
