272 THE CANADIAN NATURALIST. [Vol. vii. 



16.35'"'"- and its extreme breadth 7.2'"^. The form of the 

 wing is an oblong, pretty regular oval, the apical portion a little 

 produced. The anal nervure is deeply impressed, strongly 

 curved, especially just before its middle, where the wing was 

 somewhat convex, and terminates before the middle of the basal 

 two-thirds of the posterior border. The other nervures and their 

 branches are very delicate, and the branches equidistant and 

 rather closely crowded; the spaces between them are wholly 

 unbroken by any cross-nervules, and the surface of the wing 

 appears to have been smooth in life. (Fig. 1.) 



Blattlna Heeri^ nov. sp. This is also represented by a right 

 upper wing, but it is not so perfect as the preceding ; the whole 

 of the apex, and the outer half of the posterior border is lost. 

 The length of the fragment is 21i^i»- ; probably the entire wing 

 would have been two or three millimetres longer ; the width of 

 the wing, just before the middle, is 11.8 '"»• The wing is pro- 

 portionately broader than in the preceding species and less con- 

 vex, and the apex is probably less extended, but otherwise it 

 has much the same form. The anal nervure is deeply impressed 

 only over its basal half, and is gently curved, terminating doubt- 

 less at about the middle of the posterior border; the other ner- 

 vures and their branches are rather distinctly impressed, some- 

 what distant and regular ; the spaces between are transversely 

 and very faintly wrinkled, rather than provided with cross-ner- 

 vules; the surface is nevertheless pretty smooth ; the costal bor- 

 der is very delicately marginate. (Fig. 2.) 



This species is named in honor of Professor Oswald Heer of 

 Zurich, who has laid the foundation of our present knowledge of 

 fossil insects. 



Both of the above specimens are on dark gray shale, and are 

 associated with leaves of Sphenopliyllum and ferns. 



Cambri Ige, April 24, 1874. 



