182 NEW YORK STATE MUSEUM 



NEW AGELACRINITES 



BY JOHN M. CLARKE 

 PI. 10 



Some interesting specimens of new agelacrinites have been 

 acquired recently from the upper Devonic and supradevonic 

 sandstones in southwestern New York and northeastern Penn- 

 sylvania. The first suggestion of these came to my notice several 

 years ago through the kindness of E. B. Hall esq. of Wellsville, 

 who presented' me with a hand-size slab bearing impressions of 

 the aboral surface of four large disks, with parts of not less than 

 five others. This specimen was a loose Chemung sandstone slab 

 found at Belvidere, Allegany co. Subsequently another speci- 

 men similarly preserved was found loose near Wellsville. 

 Though the novelty of this species to our Chemung faunas was 

 recognized, the specimens were laid aside to await more light on 

 the essential characters of the organism. Through the assiduity 

 of two zealous students of the Chemung fauna, Laurence LaForge 

 and Prof. Charles Butts of Alfred N. Y., the desired facts have 

 arrived. These gentlemen have brought to light in the vicinity 

 of Alfred a very considerable number of specimens of this 

 agelacrinite, displaying variations in size that indicate different 

 stages of growth and in a large majority of cases affording the 

 oral exposure. Mr Butts has also obtained specimens of this 

 organism at a locality 2 miles south of Sabinsville, in the town of 

 Clymer, Tioga co. Pa. and these, by the courtesy of the director of 

 the U. S. geological survey I have been allowed to study and 

 figure. While discussing the structure of this species, I shall 

 provisionally refer to it as A. a 1 1 e g a n i u s . The state museum 

 has come into possession of an excellent series of these novel 

 fossils. 



While engaged in field work on the Olean quadrangle during 

 the season of 1900, Mr Butts also obtained from a very high 

 horizon in the sandstones of that region another small and rather 



