HAY.] 



CATALOGUE. 



397 



Nicholson and Lydckker 1889 A, p. 997. 



Pictet, F. J. 1854 A, p. 213 (Hoplopleurides); p. 216, 

 pi. xxxii, figs. 13-16 (Dercetes). 



Pictet and Humbert 1866 A, p. 90. (Hoplopleu- 

 rides.) 



Reis, O. M. 1895 C, pp. 169, 180, 182. (Hoplopleu- 



ridffi.) 

 Williston, S. W. 1899 B, p. 115. 



1900, in Stewart A. 1900 A, p. 380. 

 Zittel, K. A. 1890 A, p. 264. (Hoplopleuridse.) 



ICHTIIYOTRINGA Cope. Type I. tenuiroslris Cope. 



Cope, E. D. 1878 F, p. 69. 



1878 HH, p. 57. 

 Williston, S. W. 1899 B, p. 115. 



1900, in Stewart A. 1900 A, p. 382. 



Ichthyotringa tenuirostris Cope. 

 Cope, E. D. 1878 F, p. 69. 



Cretaceous (Niobrara) ; South Dakota. 



LEPTECODON Williston. Type L. rectus Willist. 



Williston, S. W. 1899 B, p. 113. 

 Leptecodon rectus Willist. 

 Williston, S. W. 1899 B, p. 113, pi. xxvi. 



Williston, S. W. 1900, in Stewart, A. 1900 A, p. 380, 

 pi. Ixxiii. 

 Cretaceous (Niobrara); Kansas. 



TRIJENASPIS Cope. Type T. virgulatus Cope. 



Cope, E. D. 1878 F, p. 67. 



1878 HH, p. 57. 

 Williston, S. W. 1899 B, p. 115. 



1900, in Stewart, A, 1900 A, p. 382. 



Trisenaspis virgulatus Cope. 



Cope, E. D. 1878 F, p. 67. 



Cretaceous (Niobrara); S. Dakota. 



LEPTOTRACHELUS Marck. Type L. armatus Marck. 



March, W. 1863 A, p. 59. 

 Cope, E. D. 1878 F, p. 68. 



1878 HH, p. 57. 

 Davis, J. W. 1887 C, p. 619. 

 Nicholson and Lydekker 1889 A, p. 997. (Syn. of 



Dercetes. ) 

 Pictet and Humbert 1866 A, p. 93. 



Reis, O. M. 1895 C, p. 169. 

 Zittel K. A. 1890 A, p. 268. 



Leptotrachelus longipinnis Cope. 

 Cope, E. D. 1878 F, p. 68. 

 Williston, S. W. 1899 B, p. 115. 



19UO, in Stewart, A, 1900 A, p. 382. 

 Cretaceous (Niobrara); S. Dakota. 



GASTEKOSTEID.E. 



Cope, E. D. 1872 C, p. 338. 

 Gill, T. 1893 A, p. 137. 

 Giinther, A. 1859 A, p. 1. 

 1880 A, p. 504. 



Jordan and Evermann 1896 A, p. 742. 



Parker, W. K. 1868 A, p. 39. 



Sauvage, H. E. 1874 A. (" Epinoches.") 



GASTEROSTEUS Linn. Type G. aculeatus Linn. 



Linnxus, C., 1758, Syst. Nat., ed. x, p. 489. 

 Giinther, A. 1859 A, p. 2. 



1880 A, p. 505. 

 Huxley, T. H. 1858 C, p. 39. 

 Jordan and Evermann 1896 A, p; 746. 

 Owen, R. 1845 B, p. 91. 

 Parker, W. K. 1868 A, p. 39. 

 Sauvage, H. E. 1874 A, p. 5. 



Gasterosteus bispinosus Walbaum. 



Walbaum, 1792, Artedi Pise., p. 450. 



Dawson, J. W. 1877 B, p. 341. (G. aculeatus?) 



1890 A, p. 86. (G. aculeatus?) 

 Jordan and Evermann 1896 A, p. 748. 



Living; Labrador to New Jersey: Pleisto- 

 cene; Canada. 



It seems most probable that the stickleback 

 found fossil in Canada by Dr. Dawson is the O. 

 bispinosus, common on our Eastern coast. 



Order MESICHTHYES nom. nov. 



Actmopteri with anterior vertebrae unmodi- 

 fied and not connected with auditory appara- 

 tus. Branchial arches well developed. Pre- 

 coracoid arch and interclavicles absent. Ven- 

 tral fins abdominal. 



This order is intended to include the Haplomi, 

 the Synentognathi, and the Percesoces. 



