GRAPTOLITES OF NEW YORK, PART 1 655 



tion. In regard to the latter feature this species approaches the nepionic part 

 of the branches and thus appears as a more primitive form. It could there- 

 fore be taken for a derivative of T . f r u t i c o s u s in a state of arrested 

 development, and lacking the tendency to reclination. The dependent posi- 

 tion of the branches in this species is also maintained in its closest genetic 

 relative, Didymograptus (indent us) dentatus. 



Tetragraptus serra Brongniart sp. 



Plate n, flfTures 8-10 



Fucoides serra Brongniart. Hist. Veget. Foss. 1828. 1:71, pl.6, fig.7, 8 

 Didymograpsus cadueeus Salter {pan). Quar. Jour. Geol. Soc. 1853. 9:87, 



fig-la 

 Graptolithus bryonoides Hall. Geol. Sur. Can. Itep't for 1857. 1858. p.l26 

 Tetragrapsus (bryonoides) Salter. Quar. Jour. Geol. Soc. 1863. 19:137, 



%8 

 Didymograpsus cadueeus Salter. Ibid. p.l36 

 Graptolithus bryonoides Hall (pars). Canadian Organic Remains, decade 2. 



1865. p.84, pl.4, fig.1-8, 11 

 Graptolithus bryonoides Billings. Geol. Sur. Can. Pal. Foss. 1865. 1:366, 



375 

 Tetragrapsus bryonoides Nicholson. Quar. Jour. Geol. Soc. 1868. 24:131 

 Graptolites (Didymograpsus) bryonoides McCoy. Geol. Sur. Victoria. 



Prodr. Pal. Victoria, decade 1. 1874. p.l5, pi 2, fig.2, 3, 5 

 Tetragraptus quadri brae hiatus Etherid^e jr. Ann. and Mag. Nat. Hist. 



8er.4. 1874. 14:3, pl.3, fig.5-8 

 Tetragraptus bryonoides Etheridge jr. (pars) Ibid, p 2, pl.3, fig.l 

 Tetragraptus serra Hopkiuson & Lapworth. Ibi</. 1875. 31:650, pi. 33, lig.lO 

 Tetragraptus bryonoides Linnarsson. Sver. Geol. Und. 1879. Afb. oeb upps. 



ser.C, no.31, p.5 

 Tetragraptus bryonoides Brogger. Die sil. Etagen 2 and 3. 1882. p 38 

 Tetragraptus bryonoides Tullberg. Skanes Grapt. in Sver. Geol. Und. 1882. 



Afh. och upps. ser.C, no.50, p.22 

 Tetragraptus serra Turnquist. Sver. Gool. Und. 1883. Afh. och upps. ser.C, 



no.57, p. 16 

 Tetragraptus serra Herrmann. Geol. Mag ser.S. 1886. 3:19 

 Tetragraptus serra Ami. Geol. Sur. Can. Ilep't, ser.2. 1889. v.3, pt2, p.ll6k 



