GRAPTOLITES OF NEW YORK, PART 2 357 



simplex Emmons, no. 2 



The " D i p 1 o g r ap s u s secalinus, Graptolithus seca- 

 1 i n u s ( Hall), Fucoides secalinus ( Eaton ) F . simplex 

 (Emmons)" of Emmons, 1856, Am. Geol. pt 2, p. 104, t. 1, f. 11. It is 

 far better that this "simplex, Emmons" should disappear from nomen- 

 clature forever and I therefore propose for this species the name I ) i p- 

 lograptus ? prionoides (sp. n.). I do so with the less reluctance 

 as the figure shows it to be strikingly distinct from any other species 

 with which I am acquainted. I have not seen the specimen. 



Its horizon is doubtful. Dr Emmons says: " It is confined to the 

 Hoosic roofing slate." This is true of the preceding species ("sim- 

 plex Emmons no. 1 ") but that is the only fossil that has ever 

 been found in those shales, and it is almost certain that "simplex, 

 Emmons, no. 2," was not found there. 



Proper name D. ? prionoides Gurley (sp. n.) 1 

 simplex Emmons, no. j 



" D i p 1 o g r ap t u s ? simplex, Emm.," and "Phyllograp- 

 tus ? simplex Emmons" Walcott (references above). F*or this 

 species Mr Walcott now proposes the name Echinograptus 

 (= P h y 1 1 o g r a p t u s Hall) ? cambrensis (sp. n.). Horizon, 

 Lower Cambrian (Georgia shales of Vermont). 



Proper name E. cambrensis Walcott (sp. n.) 



Concerning the specific relations of this form, Mr C. D. Walcott (U. S. 

 Geol. Sur. Bui. 30, 1886, p. 92-93) says: 



" Original description. Straight ; serrations pointed, cells rather dis- 

 tant oblique to axis ; the serration equal in length to one sixth or one seventh 

 of the width of the stem. The upper or young part of the stem is 3 g inch 

 wide and the number of serrations is 24 to an inch. It narrows towards the 

 base, where the serrations are rather obtuse and more distant than those 

 above, and is 10 inches long as exposed upon the slate. It is confined to 

 the Hoosic roofing slate. 



Dr Emmons originally applied the name Fucoides simplex [Tac. 

 Syst. 1844, pi. 5, fig. 1 ; N. Y. Agric. Rep't, pt 5, 1846, pi. 17, fig. 1 ] to a 

 species previously named by Prof. Amos Eaton [see N. Y. State Mus. Nat. 

 Hist. 20th Rep't, 1868, p. 268] as Fucoides secalinus. Subsequently 

 he referred the species named by him to Eaton's secalinus, calling it 

 Diplograptus secalinus, gave a description as above, and at the 



'Since this "species" would possess neither an. original description, nor a recog- 

 nizable figure, nor even a type or type locality, it is hopelessly invalid and better not 

 recognized from the start ; while D. simplex Emmons no. 2. is to be dropped from 

 consideration for the same reasons, See also Dr Gurley 's remarks below [p. 358] 



