382 NEW YORK STATE MUSEUM 



mostly preserved), which proceed from the middle of the horizontal " mouth- 

 ledges." Nemacaulus thin (.1 mm), attaining great length (30 mm) and 

 frequently inflated into a fusiform vesicle [see text fig. 31, 32]. 



Position and locality. Emmons's type came from the "dark colored 

 shales of Columbia county, N. Y.," Hall's type of Grapt. setaceus 

 from the Normanskill shale at the Normanskill near Albany. We have 

 before us a splendid series of specimens from the same shale at Glenmont, 

 south of Albany. It likewise occurs in other outcrops of the same horizon 

 in the slate belt of New York, as at Mt Moreno near Hudson, at the Kinder- 

 hook creek, etc. The collection of Normanskill shale graptolites from 

 Alabama contains it in great number and large specimens [see below]. Lap- 

 worth has recorded it from Long Point, St Anne river, Quebec, where it is 

 the only graptolite occurring and from the beds at Kicking Horse pass and 

 Dease river, British Columbia, which are considered by that author as older 

 than the Normanskill shale and referred to the Chazy by Gurley [1896, 

 p. 298]. Gurley has further recognized it in beds of Normanskill age in 

 Arkansas and referred to it, following Lapworth's manuscript report, speci- 

 mens from shales of Summit, Nev., probably of Beekmantown age [see 

 " Remarks "]. Dodge has listed it also from Maine and Hopkinson and Lap- 

 worth have identified with G. c Hiatus a specimen obtained in the St 

 David's beds (Upper Arenig) in 1880 and Lapworth [1880, p. 2 76] also cites 

 it from Tyobry in N. Wales. It is also probable that the Glossograptus sp. 

 cited by Tullberg as characterizing two zones and a subzone of the Middle 

 graptolite shales of Scania belongs here. G. c i 1 i a 1 11 s seems in this State 

 to be restricted to the Normanskill shale though in other regions as in 

 Great Britain and British Columbia, it may have appeared earlier. 



Remarks. For reasons given in the generic description we have here 

 united Hall's species Grapt. spinulosus as a synonym with G. 

 cilia tus, as representing but another aspect of tin; latter. Emmons's 

 G. setaceus, which is described in the same publication with G. 

 c Hiatus without locality is clearly but a fragment of the sicular end in 



