183 NEW YORK STATE MUSEUM 



NEW AOELAORINITES 



BY JOHN M. CLARKE 

 PI. 10 



Some interesting s])eoimens of new agelaerinites have been 

 aciiuired i^cently from the upper Devonic and supradevonic 

 sandstones in southwestern New York and northeastern Penn- 

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

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

 wlio 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 Chemnng 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 TjaForge 

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

 arrived. Those gentlemen have ibrought to light in the vicinity 

 of Alfred a very considerable number of s])ecimens 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 olitaiued specimens of this 

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

 Cl^^ner, 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 str^icture 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 x)OS8ession of an excellent series of these novel 

 fossils. 



While engaged in field woik on the Glean (piadrangle during 

 the season of IfMK). Mi' l?ntts also obtained from a very high 

 horizon in the sandstones of that region another small and rather 



