HUDSON RIVER BEDS NEAR ALBANY 518 



DiplograptU'S sp., fragment of a larger mucronate (?) or mace- 

 rated form, not well preserved 

 Corynoldes cf. curtus, LapwortJi^ 

 Dalmanella testudinaria, Dalman sp. 

 cf. Orthi'S (?) centrilineata, Hall 

 Platyetropliia biforata, ScJilotheim sp. 

 Plectambonites sericea, Soioerhy sp. 



^This little known graptolite has, hitherto, not been observed in America. 

 Corynoides calicularis Nicholson, which occurs in the Scot- 

 tish Hartfell and Glenkiln shales was recognized by Lapworth in the 

 Canadian Dicellograptus zones and is the only species of Corynoides 

 mentioned by him and Dr Gurley from America. It is also very common 

 in the Normans kill shale, and was figured by Hall among the " germs ", 

 evidently on account of its similarity with the sicula (Decade 2, pi. B, 

 fig. 19; 2{>th mus. rep't, pi. 1, fig. 19; Pal. N. Y., 3:508, fig. 7). While 

 Corynoides calicularis is apparently restricted to the Dicello- 

 graptus zones, and did not continue to live into Utica time, another form, 

 only half as long, much stouter and agreeing with the figure of Cory- 

 noides curtus, given by Lapworth (Armstrong, Young, and Robert- 

 son, Catalogue of West Scottish fossils. 1876. pi. 2, fig. 92) has been 

 found to replace the longer form in the Utica beds of Panton Vt., the 

 Kural cemetery of Albany and other localities in the Hudson valley, while 

 specimens in the collection of the New York state museum prove its pres- 

 ence also in the Utica shale of Amsterdam. One slab from this locality is 

 so densely covered with these graptolites that hardly any interspaces are 

 left; on another slab from the same locality they lie associated with 

 Diplograptus putillus, Lingula curta and L e p t o- 

 bolus insignis. One slab of typical black Utica shale from Sprak- 

 ers Basin shows the same fossil. It is a remarkable circumstance that 

 the writer has never seen a single specimen in the U^ica shale of the 

 middle or upper Mohawk valley, nor are there any specimens in the rich 

 Rust collection of the state museum from Holland Patent. This may 

 indicate a regional difference in the fauna of the Utica shale. The com- 

 mon occurrence of this fossil in the sandy shales of Waterford, whence 

 the writer has it in the same slabs with Trinucleus concen- 

 tric u s and the lamellibranchs of that locality, proves that it even 

 ascends into the Lorraine beds. One specimen has been found at Cal- 

 lanan's quarry near South Bethlehem in the shale of that formation 18 

 feet below the waterlime bed of the Upper Siluric. 



The writer has obtained such a good representation of this still very im- 

 perfectly understood form (Freeh cites it among the doubtful forms, 54: 

 580), that its more important morphologic characters can be made out, 

 and will be published in another place. 



