64 CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



Semionotus fultus (Agassiz). 

 (Plate III.) 

 1836. Palceoniscus fultus L. Agassiz, Poiss. Foss., ii, pt. i, 



PP- 4, 43. Pl- 8, figs. 4, 5. 

 1841. Palceoniscus fultus W. C. Redfield, Am. Journ. Sci., 



[i]xli, p. 25. 

 1841. Palceoniscus macropterus W. C. Redfield, ihid., p. 25. 

 1847. Ischypterus fultus Sir P. G. Egerton, Quart. Journ. 



Geol. Soc, iii, p. 277. 

 1850. Ischypterus fultus Sir P. G. Egerton, ibid., vi, 



pp. 8, ID. 

 1877. Ischypterus fultus R. H. Traquair, ibid., xxxiii, 



P- 559- 

 1888. Ischypterus fultus J. S. Newberry, Monogr. U. S. 



Geol. Surv., xiv, p. 34, pl. 6, fig. 2; pl. 7, fig. i. 

 1895. Semionotus fultus A. S. Woodward, Cat. Foss. Fishes 



Brit. Mus., pt. 3, p. 58. 

 1901. Semionotus fultus E. Schellwien, Phys.-okon. Ge- 



sellsch. Konigsberg, p. 29, pl. 3, figs. 4 (?), 5. 

 1903. Semionotus fultus G. F. Eaton, Am. Journ. Sci., [4] 



XV, p. 261, pl. 5, figs. 1-4. 

 1905. Semionotus fultus C. R. Eastman, Ann. Rept. N. J. 



Geol. Surv. for 1904, p. 83, pl. 2, figs. 1-4; pl. 9. 



The synonymy given above is that adopted by most recent 

 writers. The two species, 5". fultus and 5". macropterus, were 

 first united by J. H. Redifield in his paper presented before the 

 American Association of Geologists and Naturalists in 1845, but 

 were afterwards held by Newberry to be distinct on account of 

 slight, and, as a matter of fact, inconstant differences in their body 

 proportions. It is now commonly recognized that minor dif- 

 ferences of this nature are the result of accidental conditions of 

 preservation. Following are the chief diagnostic features of this 

 species : 



D. 10; C. 15; A. 10; P. 10. 



A gracefully fusiform species attaining a total length to the 

 base of the caudal fin of about 15 cm., in which the length of 



