PLATE XXVII. 



LlMOPTERA MACROPTEB \. 



Page 246.' 

 Bee Plates 24. 26, 28, 29 and 92. 

 Fig. 1. The right valve of a small individual which is veryperfeci in form. 

 Fig. 2. A small right valve. 



Hamilton group. Summit, ScJioharie Co., iV. Y. 

 Pig. 3. A. somewhat larger example. 



Hamilton group. Lebanon, Madison Co., N. Y. 

 Fiir. 4. A left valve obliquely compressed and showing no surface radii. 

 Pig. .">. The right valve of the preceding. 



Kg. 10. A profile view showing the comparative convexity of the valves. This specimen is the original 

 of Conrad's description. 



Hamilton group. Madison Co., X. Y. 

 Figs. 6, 7. Two views of s specimen which shows very distinctly the character of the surface. 



Fig. 8. A cardinal view of a large s| imen. The figure was intended to show the striated area of both 



valves and a vertical depression under the beaks as if from a receding cartilage pit; but 

 these features have unfortunately been lost in the lithography. 

 Pig. 9. A cardinal view of an individual distorted by lateral compression. The internal mould shows one 

 distinct point of muscular attachment on the apex of each valve. See plate 28, fig. 4, for an 

 illustration of the right valve of this specimen showing the umbonal muscular impression and 

 pallia] line. 



Hamilton group. Madison Co., iV. Y. 



