64 BR, ®, CURLEY 
zodlogic limits of the group, as this paper being rather geologic 
than zodlogic, the aim has been to include every species of grapto- 
lite (as the word is generally understood), reported from Ameri- 
can strata, with the proper generic reference and the ascertained 
range. Only species in good standing are, however, given, and 
such forms as Nereograpsus, which are no longer regarded by any 
one as graptolites, are omitted. 
Finally, all new species here described will be fully illustrated 
in a future publication of the U.S. Geological Survey. The 
authority for each new species is appended to it. 
In DESCRIPTIONS ORNGENE RAVANID ESP Ee Glizs: 
PHYLLOGRAPTUS HALL, 1858. 
Rep. Progr. Geol. Surv. Can. for 1857, pp. 135, 137. Type, P. typus Hall. 
Phyllograptus ? cambrensis Walcott, sp. nov. 
“ Diplograptus simplex (Emmons) Walcott, 1886, Bull. 30, U. S. Geol. 
Surv., pp. 92-93, Plate XI., Figs. 4, 4a; “Phyllograpius simplex 
(Emmons)” Walcott, 1889, Amer. Jour. Sci., XXXVIII., p. 388. 
The synonymic relations of this species are very complex. For the pres- 
ent it is sufficient that it is neither /zcoides simplex Emmons, 1844 (Zaconic 
System, p. 27, Plate V., Fig. 1), nor Diplograpsus secalinus (Eaton) Emmons, 
1856 (American Geology, |., Part II., p. 104, Plate I., Fig. 11). 
BRYOGRAPTUS LAPWORTH, 1880. 
Ann. and Mag. Nat. Hist., V., p. 164. Type, B. syerudfi Lapw. 
Bryograptus ? multiramosus Gurley, sp. nov. 
Polypary round-triangular in outline; length and breadth each 20™™. 
Proximal extremity bearing a sicula 1™™ long. Branches numerous, dividing 
dichotomously, one being five times divided (including sicular division). 
Thece 30 to 35 in 25™™, forming cylindrical tubes, free for one-half their 
_ length or a little less, pustuliferous. Virgula not seen. 
Horizon and locality.—Several specimens on some pieces of Upper 
Cambrian shale from Matanné, Canada, sent by Sir J. William Dawson to the 
National Museum. 
DICHOGRAPSUS SALTER, 1863. 
Quart. Jour. Geol. Soc. London, XIX., p. 139. Type, D sedgwtck Salter. 
Dichograpsus remotus Gurley, sp. nov. 
Only a single specimen seen. Branches very narrow, having a length of 
25 to 35™™ between successive points of division, the latter apparently becom- 
