528 NEW YORK STATE MUSEUM 



Station 13. Bnttermilk fall, Watervliet 



At the so-called Buttermilk fall (station 13) just south of the 



Devil's Den, Diplograptus putillus, Hall was found in 



black shales. 



Station 14. Rural cemetery, Albany 



One mile directly south of the last two localities lies the Rural 

 cemetery of Albany (station 14). Here a rich fauna was dis- 

 covered by Dr Clarke in a road metal quarry close to Prof. JameB 

 Hall's g^rave. The rock is a deep black, strongly carbonaceous, 

 argillaceous shale. It contains: 



Orthograptus quadrimucronatus, Hall sp. in great profusion 

 and exquisite preservation, in fact in the best state of pres- 

 ervation of rhabdoiS'omes of graptolites ever seen by the 

 writer in shale. 

 Diplograptus putillus, Hall 

 D. spinulosus sp. n. 

 Corynoides curtus, Lapworth 

 Dendrograptus sp.^ 



^here occur in the shale of the Rural cemetery extremely fine and 

 slender, chitinous, irregular branching threads of undoubted graptoUtlc 

 nature. These are rolled up, the larger and smaller branches separately, 

 into an intricate, irregularly convolute mass. Such a form has been 

 •described and figured by Emmons American geology. 1875. pt 2. p. 109. 

 pi. 1. fig. 7) as Nemagrapsus capillar! s. Hall did not recog- 

 nize the genus, as one of Emmons's species, N. elegans, is 

 only a fragment of Coenograptus gracilis, and the rela- 

 tions of the other form, N. c a p i 1 1 a r i s, on which neither thecae 

 nor thecal apertures were observed, " can scarcely be determined from 

 the figures given" (11:43; 13:211). The genus was later accepted by 

 Lapworth, but Roemer (54:587) remarks that Hall, having access to the 

 material, was certainly better prepared to judge its value. Ami (Bui. geol. 

 Boc. Amer. 1891. II. table p. 495) reports it doubtfully from the Can- 

 adian Calciferous; and Gurley, after having described a form as belonging 

 to Nemagraptus which he later recognized tobeaThamnograp- 

 t u s, declares that he has found typical specimens of Nemagraptus 

 e a p i 1 1 a r i s at Stockport, Columbia co., but does not describe them 

 (50:306), The writer's material shows all the features indicated by 

 Emmons's figure. Both the figure mentioned and the material suggest that 

 the fossils consist of the broken terminal filiform branches of some delicate 

 ramose graptolite which, drifting about, were rolled up. A comparison 

 with specimens of Dendrograptus tenuiramosus, Walcott 

 <19:21. pi. 1. fig. 4) from the Utica shale shows that our form on th« 



