29 



The form is very like that of Cyclonema Hageri but much larger. S 

 turgida has the suture more deeply impressed. 



Locality and Formation. — PhiUipsburgh in the County of Missisquoi, 

 Canada East. In the upper part of the Calciferous formation. 



Collectors. — Dr. P. J. Famsworth and E. Billings. 



Cyclonema Hageri. (N. sp.) 



I'ig 26. Fig. 27. Pig. 28. 



Fig. 26. — Holopea Pyrene. Fig. 21. — Cyclonema Hageri. Fig. 28.— C. Montrealensis. 



Description. — Shell large, obliquely conical ; whorls four, ventricose 

 towards the base, somewhat, depressed in the middle ; suture moderately 

 deep. The apical angle appears to be between 80° and 90°. Surface 

 with strong angular ribs or undulations of growth from half a line to two 

 lines apart becoming more prominent with age. These are crossed by 

 fine spiral ridges from half a line to one hne distant. 



Height of specimen 2| inches ; width at base 2 inches. The body 

 whorl is at least i the whole length. 



This species much resembles in form 0. Montrealensis but is twice the 

 length and breadth. 



It is dedicated to A. D. Hager, Esq., of the Geological Survey of Ver- 

 mont, who discovered the only specimen I have seen. 



Locality and Formation. — Smith's Quarries, Montreal. Trenton lime- 

 stone. 



Collector. — A. D. Hager, Esq. 



