56 



THE CAKBONIFEROUS. 



authority on fossil insects, and lie was able to discriminate two genera 

 and five species. This was stated in a note at page 405 of Acadian 

 Geology, and I now give a series of diagrammatic illustrations 

 prepared by Mr Scudder, showing the characteristic forms of the 

 segments in the several species (Fig. 11.) 



Fig. 11.— Jlfi/riapods froin the Coal Formation of Nova Scotia. — After Scudder. 

 a h c d e 



(a) Two SegmctltS of Xyloblus StKillal'iir>, Dawson, 

 (i) „ „ „ X. similis, Scudder. 



(c) „ „ „ X.farctus, „ 



(d) One Segment of Archiulus Dawsoni, Scudder. 



(e) „ „ „ A. xylobioides, „ 

 (/) Anterior Segments of „ ., 

 (g) Antennae, Joints of „ ,, 



The remarkable discovery of Carboniferous batrachians made at 

 the South Joggins in 1876, in one of those erect trees which have, 

 since 1851, afforded so many similar remains, is of so much interest 

 in connexion with the species described in Acadian Geology, that I 

 make considerable extracts from the account of it published at the time. 



The tree of 1876 was found by me in "the reef," or extension of 

 the sandstone seaward, and near the low -water mark. The upper 

 part of the stump, probably filled with sandstone, had been removed 

 by the Avaves, but about 2 feet of the lower part remained. It was 

 extracted with as much care as possible by two miners with picks and 

 crowbar, and the disk^like fragments, into which it naturally split, 

 were carried up to the foot of the cliff, and subsequently numbered 

 and dissected at leisure. In the hurry of working against time to 

 escape the tide, the men, it seems, left in the hole a portion of the 

 lowest layer, and a fragment of an upper one. The former was after- 

 wards removed by Mr J. C. Russel, of Columbia College, New York, 

 and the latter was found by Mr Hill. Both have been kindly placed 

 in my hands by these gentlemen, so that the whole of the material 



