DEVONIC FISHES OF THE NEW YORK FORMATIONS IO3 



cult to maintain the distinction between M. s u 1 1 i v a n t i and M. m a n n i, 

 and was '' disposed to consider the differences which they exhibit as prob- 

 ably due to age or sex." ' A final statement of Newberry's views regarding 

 the structure and relations of Macropetalichthys appeared in his Mono- 

 graph on Palaeozoic Fishes of North America, published in 1889, the genus 

 being compared with existing sturgeons, and sensory canals being still mis- 

 taken for sutures. Cope,"" in his review of his friend's monograph, denied 

 that this genus was in any way related to modern ganoids, and redescribed 

 its characters the following year. Some additional details were pointed 

 out by the present writer in 1897, and an attempt was made by Dean, in 

 his important memoir of 1 901, to homologize the cranial plates of Macro- 

 petalichthys with those of other forms. Aside from the reviews of this 

 memoir which appeared in this country and abroad, nothing has been 

 contributed to the literature of the American species within the last few 

 years. 



Macropetalichthys rapheidolabis Norwood & Owen 



Plate 9, figure 5; plate 11; text figures 19-21 



1846 Macropetalichthys rapheidolabis Norwood & Owen. Am. Jour. 

 Sci. [2] 1:371 



185 1 "Buckler of ganoid fish " Z. Agassiz. Am. Ass'n Adv. Sci. Proc. 5: 179 



1852 Macropetalichthys sp. /. S. Newberry. Ann. Sci. i, p. 12 



1857 A g a s s i c h t h y f? s u 1 1 i v a n t i J. S. Newberry. Nat. Inst. Bui. p. 124 

 1857 Agassichthys manni J. S. Newberry. Nat. Inst. Bui. p. 122^ woodcut 

 1862 Macropetalichthys m an ni and M. rapheidolabis. Am. Jour. Sci. 



[2] 34: 75. 76, woodcut 

 1873 Macropetalichthys sullivanti J. S. Newberry. O. Geol. Sur. Rep't 



Palaeont. v. i, pt 2, p. 294, pi. 24, 25, fig. i 



1889 Macropetalichthys sullivanti /. S. Neivberry. U. S. Geol. Sur. 

 Monogr. 16: 44, pi. 38, fig. i, 2 



1 890 Macropetalichthys sullivanti E. D. Cope. Am. Nat. 24 : 846 



1 89 1 Macropetalichthys sullivanti and M. rapheidolabis E. D. 

 Cope. U. S. Nat. Mus. Proc. 14: 449-56, pi. 29, 30, fig, 5 



' Ohio Geol. Sui. Rep't. Palaeont. 1873. v. i, pt 2, p. 295. 

 ''Am, Nat. 1890. 24:844-47. 



