30 NEW YORK STATE MUSEUM 



conradella Ulrich & Seofield 

 Conradella compressa Conrad sp. 



Phragniolites compressus Conrad. An. geol. rep't. 

 1838. p. 119 



A few specimens of this handsome and striking fossil were 

 found in gray crystalline limestone pebbles of the Moordener 

 kill conglomerate, and black compact limestone pebbles of the 

 Eysedorph hill conglomerate. The specimens do not show any 

 marked difference from the typical material of this species in 

 the New York state museum, nor any approach to any of the 

 western species of this genus described-by Ulrich. In New York 

 this form is known only from the Trenton limestone. (Groups 

 5, 7) 



CARINAROPSIS Hall 



Carinaropsis carinata Hall. Pal. N. Y. 1847. 1:183 



In a pebble of compact black limestone of the Rysedorph hill 

 conglomerate a large Carinaropsis was found associated with 

 numerous cranidia of a Keimopleurides, which in profile and out- 

 line, and specially in the largely expanded aperture, and the 

 sudden contraction toward the small incurved apex fully agrees 

 with Carinaropsis carinata Hall, slightly differing in 

 that the carination becomes obsolete near the apertural margin. 

 Several smaller specimens of this rare species were found in the 

 gray crystalline limestone, and in the compact reddish gray lime- 

 stone a large specimen with very sharply projecting carina and 

 strong concentric corrugations around the aperture. Hall reports 

 this species from the black compact limestone at Middleville and 

 Trenton Falls; while later collectors of Trenton fossils in this 

 state make no mention of it. In the west the genus is repre- 

 sented in the Trenton group by several other species. (Groups 



5, 6, 7) 



lophospira Whitfield 



Lophospira bicincta Hall sp. 

 Murchisonia bicincta Ball. Pal. N. Y. 1847. 1 :177 



Several casts of large specimens showing distinctly three 

 carinations on the last whorl and the bicarinate upper whorls, 



