118 ROYAL SOCIETY OF CANADA 



Portions of two anal nerves are preserved near the lower margin of 

 the wing. 



The system of nervules is not shown except in the space between the 

 mediastinal and the scapular and between that and the externomedian 

 where light transverse nervules are visible. 



As this wing throws off nervules on the upper side of the mediastinal 

 (or costal) vein, if this and other characteristics be considered it would 

 fall in C. Brongniart's limitations of Orthopteridas. The wing is a very 

 broad one and so probably a hind wing, and under Brongniart's classi- 

 fication would be referred to the Phasmida. 



Length, 65 mm. Width, 40 mm. 



Horizon and Locality. — Found in a somewhat coarse shale of the 

 Lower Cordaite shales at Fern Ledges, Lancaster, N.B. Collected by 

 W. J. Wilson. The type is in the cabinet of the Geological Survey of 

 Canada. This is one of the largest wings obtained from the shales of 

 the Little E. Group. 



A comparison may be made of this wing with JEdœophasma Anglica 

 Scud, of the Coal-measures of Great Britain in which the main veins have 

 a similar course though differing in details. The branches of the sca- 

 pular and externomedian, are more strongly arched downward in 

 Scudder's species, and the wing therefore was probably proportionately 

 wider. 



ARCH^OPHASMA n. gen. 



Nervation strong and simple, anterior end of mediastinal (costal) 

 bent down toward the scapular, space between the scapular (radius) and 

 externomedian (median) quite wide in the basal half of the wing, with 

 several oblique connecting veins between. Externomedian with strong 

 branches in the basal half. Internomedian (cubitus) branched at the 

 base and again at the middle third. Anal veins not known. 



The great width between the scapular and externomedian veins is 

 an unusual feature in this family. (Phasmidae.) 



Arch^ophasma geandis n. sp. Plate I, Fig. 2. 



This wing though broken and thus reduced, must have been one of 

 very large size, for the apical third and the lower third are broken away. 



The mediastinal (costal) nerve though without any precostal area 

 for most of its length, has a short triangular one at the base, where the 

 nerve is flexed downward toward the scapular. 



The scapular vein (radius) was flexed down at the base and the 

 bend was strengthened by a branch emerging near the base and rejoin- 

 ing the scapular at about one-third of its length from the base. 



