372 CONTRIBUTIONS TO CANADIAN PAL^ONTOLOGT. 



Megistocrinus rugosus, Lyon and Casseday. 



Mewtocrinvs rugosus, Lyon and Casseday. 1859. Am. Journ. Sc. and Arts, ser. 2, 

 vol. XXVIII., p. 243. 

 ,, ,, Whiteaves. 1887. This volume, pt. 2 (advance sheets) p. 101, 



Wachsmuth and Springer. 1897. N. Amer. Crinoidea Ca- 

 raerata, vol. II., p. 542, pi. 48, tigs. 0, a-c. 





Fig. 1. MegUUii-rmus rugosus. Diagram of the plates composing the dorsal cup and leg- 

 men of one of the type specimens of this species, from Louisville, Kentucky. 

 Fronj an original drawing hy the late Major Sidney S. Lyon, lent by Mr. 

 Victor W. Lyon. ... Anal side. 



A small specimen, which was regarded by Mr. Wachsmuth as a young 

 individual of this species, was collected near Thedford by the Rev. J. M. 

 Goodwillie in 1882, and presented by him to the Museum of the Survey. 

 A similar, but much larger and in some re.spects better preserved speci- 

 men, was picked up in the Riviere aux Sables, near Thedford, in 1891, by 

 Mr. G. H. Stone (of Almont, Michigan), who has also presented it to the 

 Museum of the Survey. Both of these specimens have been sent to Mr. 

 Victor W. Lyon, of Jefferson ville, Indiana, for comparison with the types 

 of M. rugosus in his possession, and in regard to the former Mr. Lyon 

 writes as follows, in a letter dated Nov. 5, 1897 : — " I have compared the 

 two Canadian crinoids with type specimens of Megistocrinus rugosus, 



