260 t'ORTY-THIRB RtlPOET ON THE StATE MDSEUM. 



which in its compressed condition has a width of 75 mm.; the greatest 

 length of the fragment is 87 mm. 



This species presents some similarities to D. rude but may be dis- 

 tinguished by the double series of surface ridges and the squares 

 formed by their intersection. 



Formation and locality. In the Waverly group at Warren, Penn. 



DiGTYOPHYTON SCITUM, Sp. n. 



The original specimen of this species pi'esents surface features 

 apparently similar to those described for D. Randalli. The pri- 

 mary and secondary ridges in the latter species, which appear to 

 be pure ornamental characters, are here spicular bands of greatly 

 different size, and making but slight nodes at their intersection. 

 The quadrate areas are comparatively small and somewhat elongated, 

 each containing four quadrules made by intersection with the sec- 

 ondary bands and each of the latter, four or possibly sixteen meshes 

 of lesser degree. 



The original has a length of 120 mm. and a width of 50 mm. 



Formation and locality. — In the Chemung sandstones at the Chemung 

 Narrows, N. Y. 



DiGTYOPHYTON AMALTHEA, Sp. U. 



Gup slender, exj)anding very gradually, probably circular in trans-^ 

 verse section, gently curved toward the base. In the original 

 specimen the basal portion is wanting, but the remainder of the 

 surface bears four deep and broad constrictions, which increase in 

 size toward the aperture and give to the cup the appearance of being 

 strongly annulated. The area about and below the aperture is 

 without a constriction at the usual interval. The reticulum is marked 

 by a series of distant longitudinal ridges or spicular bands of which 

 six or seven are visible on the exposed surface, but no other trace of 

 structure is evident. 



The description is drawn from a plaster cast of the original speci- 

 men which was formerly in the possession of the Rev. A. H. Riley, of 

 Montrose, Penn. This measures from the aperture, which is entire, 

 to a point near the base, where the specimen is broken, 280 mm. in 

 length, 70 mm. in width across the aperture and 20 mm. in width near 

 the base. 



Formation and locality. — Chemung group, Great Bend, Penn. 



DiGTYOPHYTON TOMACtJLUM, Sp. H. 



In the original specimen the cup was apparently circular or sub- 

 elliptical in cross section, tapering very slowly toward the base and 

 slightly curved. Base and aperture unknown. Surface covered with 



