Grabau — Faunas of the Hamilton Group. 



285 



Genus Cranaena, Hall and Clarke. 

 137. Cranjsna Romingeri, Hall. 

 1867, Hall, (Terebratula) Pal. N. Y., vol. 4, p. 819, pi. 60. 

 1893, J. Hall and J. M. Clarke, Pal. N. Y., vol. 8, pt. ii, p. 297, fig. 215. 

 This species occurs in the same beds as the preceding, though it 

 is less common. A small specimen from the lowest Trilobite bed appears to 

 belong to this species. 



Genus Tropidoleptus, Hall. 

 138. Tropidoleptus carinatus, Conrad. 

 1867, Hall, Pal. N. Y., vol. 4, p. 407, pi. 62. 

 This fossil is almost entirely restricted to the Encrinal limestone at 

 Eighteen-mile creek. A normal specimen was obtained about twenty feet 

 below the Encrinal limestone. At Avery's creek and on the lake shore this 

 species occurs sparingly between the Trilobite and Strophalosia beds. In the 

 Encrinal limestone it is abundant, and the specimens are often large. It has 

 not been found in the Moscow shales. At Morse creek it is common a few feet 

 below the Encrinal limestone. 



CRINOIDEA. 

 Genus Taxocrinus, Phillips. 



139. Taxocrinus, sp. 

 1862, Hall, 15th Rep. N. Y. State Mus. Nat. Hist. p. 118, pi. 1. 

 A specimen of an undetermined species was found in the Moscow shale 

 about four feet above the Encrinal limestone. 



Genus Ancyrocrinus, Hall. 



140 Ancyrocrinus bulbosus, Hall. 

 1862, Hall, 15th Rep. N. Y. State Cab. Nat. Hist. p. 90, pi. i. 

 This species occurs in the lower Moscow shale, three to five feet above 

 the Encrinal limestone, and in the 8. demissa bed, JSadroerinus pentadactylus, 

 Grabau (Ms) from the lower Moscow shales. 



Orino/d joints, stems, and plates. These bodies are common in the 

 S. demissa and overlying shales and in the Encrinal limestone, but are rare in 

 or absent from other parts of the group. A few unidentified calices are from 

 the lower Moscow shales. A number of distinct species are indicated.* 



*The following species have since been determined Gennwicrinxis Nyssa, Hall, and G. eucharis, Hall, from the 

 S. demissa bed. 



