GRAPTOLITES OF NEW YORK. PART 2 479 



ventral margin is in both raised to the base of the loop and the apertural 

 margin horizontal to receding; both combined producing a bluntly acute 

 distal extremity of the theca which is very characteristic oi Lasiograptus. 



We have observed but one axis in our material, which corresponds to 

 the nemacaulus. 



Lasiograptus mucronatus (Hall) 



Plate 29, figures 9, ro, 11 ; plate 30, figures 1-5 ; plate ;i, figures 1-3 



Graptolithus mucronatus Hall. Pal. N. Y. 1847. 1:268; pi. 73, fig. 



1 a— d 

 ? Diplograptus m u c rona t u s Geinitz. Die Graptolithen. 1852. p. 23 

 Diplograptus mucronatus Carruthers. Geol. Sur. Mem. 1866. 3 1330; 



pi. 11A, fig. 6; pi. 12, fig. 1 

 Diplograptus mucronatus Nicholson. Geol. Mag. 1867. 4:113; pi. 7, 



fig- 5. 5 a 

 Diplograptus mucronatus Carruthers. Geol. Mag. 1868. 5 :i$ ; pi. 5, 



fig. 2 

 Diplograptus mucronatus Nicholson. Geol. Soc. Quar. Jour. 1868. 



24:139 

 ? Diplograpsus mucronatus M'Coy. Pal. Victoria. Prodr. Dec. 1. 



1874. p. 10; 'pi. 1, fig. 5 

 Non Diplograptus mucronatus Etheridge jr. Ann. & Mag. Nat. Hist. 



1874. 14:5; pi. 3, fig. 14-17 

 ? Diplograptus (Lasiograptus) mucronatus Lapworth. Belfast 



Nat. Field Club. An. Rep't & Proc. v. 1, apx. 1877. P134; pi. 6, fig. 22 

 Diplograptus mucronatus Walcott. Alb. Inst. Trans, v. 10. 1883. 



(Advance sheets. 1879. p. 34) 

 Diplograptus mucronatus Ami. Can. Geol. Sur. Rep't. Ser. 2. 1889. 



v. 3, pt 2, P.117K 

 Lasiograptus mucronatus Lapworth. Roy. Soc. Can. Proc. & Trans. 



1887. 4:1781 

 Diplograptus mucronatus Walcott. Geol. Soc. Am. Bui. 1890. 1 ^39 

 Lasiograptus mucronatus Gurley. Geol. Sur. Ark. An. Rep't. 1892. 



3 : 4i3 

 Lasiograptus mucronatus Gurley. Jour. Geol. 1896. 4:299 

 Lasiograptus mucronatus Ruedemann. N. Y. State Mus. Bui. 42. 



1901. p. 544 



