GRAPTOLITES OF NEW YORK, PART 2 325 



remarks on the variety that will serve better to define the poorly preserved 



fossil than the original description. 



This form differs from the typical D. nicholsoni of the Utica in 

 the smaller angle (35 or 40" against ;o°-8o" in the Utica specimens) and in 

 the presence of short, rigid spines on the thecae of the stem and on practi- 

 cally all those of the branches. In the latter feature lies its chief difference 

 from var. parvangulus Gurley. I should add that a careful examina- 

 tion of the type specimen shows the proximal portion to be larger than 

 shown in White's figure, at least six thecae being visible. 



The original name being preoccupied, the variety has to pass under 



the name proposed by Miller in the American Palaeontology. 



Dicranograptus ramosus Hall 



Plate 21, figures 6, 7; plate 23, figure 1 



Graptolithus ramosus Hall. Pal. N. Y. 1847. 1:270; pi. 73, fig. 3 

 Graptolithus ramosus Salter. Geol. Soc. Quar. Jour. 1848. 5:16; pi. 1, fig. 7 

 Cladograpsus ramosus Geinitz. Die Graptolithen. 1852. p. 29 

 CI ad 6 grap su s sp. under. Emmons. Am. Geol. 1856. pi. 1, fig. 12 

 Dicranograptus ramosus Hall. Can. Org. Rem. Dec. 2, 1865. p. 15, fig. 20; 



p. 1 12 

 Dicranograptus ramosus Salter? Geol. Sur. Gt. Brit. Mem. 1866. 3:330; 



pi. 1 1 A, fig. 1 

 Dicranograptus ramosus Salter. Siluria. Ed. 4 (1866). p. 541, fig. 4 

 Graptolithus (Dicranograptus) ramosus Hall. N. Y. State Cab. Nat. Hist. 



20th An. Rep't. 1868. p. 181, fig. 21 

 Dicranograptus ramosus Nicholson. Monogr. Brit. Grapt. 1872. p. 119, 



fig. 60 

 Cladograpsus ramosus M'Coy. Geol. Sur. Victoria. Dec. 2, 1875. P^ 2 °> 



fig. 2 

 Dicranograptus ramosus Lapworth. Cat. West. Scott. Foss. 1876. p. 6; pi. 4, 



fig 80 

 Dicranograptus ramosus Whitfield. U. S. Geog. Sur. West 100th Merid. Wheeler's 



Rep't. 1877. v. 4, Pal. p. 19 

 Dicranograptus ramosus Walcott. Alb. Inst. Trans, v. 10. 1S83 (Advance sheet. 



J 879- P-34) 

 Dicranograptus ramosus Lapworth. Roy. Soc. Can. Trans, v. 5, sec. 4. 1886. 

 p. 184 



