1913.] NATURAL SCIENCES OF PHILADELPHIA. 59 



Moxostoma aureolum (Le Sueur). 



In the Cope Collection are one: from Saginaw Bay in Michigan, 

 one from the "Southern States," one from the Wabash River in 

 Indiana, one from the Neuse River in North Carolina, and five 

 from Tennessee. 



As contended by Cope, this species differs from Moxostoma ery- 

 thiirum in the smaller head. All show :' Head 4| to 4| ; depth 3| to 

 3f ; D. usually iv, 12, i, occasionally iv, 11, i; A. iii, 6, i; all V. i, 8; 

 scales 39 to 45 in lateral line to caudal base and 3 more on latter; 

 usually 7 scales above lateral line, seldom 6 or 8; usually 5 scales 

 below lateral line, seldom 6; predorsal scales usually 16, sometimes 

 15 or 17, rarely 20; snout 2| to 2| in head; eye 4 to 5; mouth width 



4 to 5; interorbital 2^^ to 2\; length 10| to 18 inches. 



Moxostoma crassilabre (Cope). 



Ptychostomus crassilabris Cope, Proc. Amer. Philos. 8oc. Phila., XI, 1S70, 

 p. 477. Xeuse River, near Raleigh, North Carolina. 



Head 4f ; depth 3|; D. iv, 11, i; A. iii, 6, i; both V. i, 8; scales 

 43 in lateral line to caudal base, and 3? more on latter; 6 scales 

 a,bove lateral line; 5 scales below lateral line; 16 predorsal scales; 

 snout 2| in head; eye 4|; mouth width 5|; interorbital 2|; length 

 12^ inches. No. 6,960, A. N. S. P., type of Ptychostomus crassi- 

 lahris Cope. Neuse River, near Raleigh, North Carolina. E. D. 

 Cope. 



Moxostoma breviceps (Cope). 



Ptychostomus hrenceps Cope, Proc. Amer. Philos. Soc. Phila., XI, 1870, 

 p. 478. Youghiogheny River, Pennsylvania. 



Head 5|; depth 4; D. iv, 12, i; A. iii, 6, i; scales 42 in lateral line 

 to caudal base and 3 more on latter; 7 scales above lateral line; 



5 scales below lateral line; 16 predorsal scales; snout 2^ in head; 

 eye 4; mouth width 4f ; interorbital 2|; length lOf inches. No. 

 22,104, A. N. S. P., type of Ptychostomus breviceps Cope. Youghio- 

 gheny River, Pennsylvania. E. D. Cope. The anal rays, as sus- 

 pected by Cope, are abnormal, and I have seen similar cases in other 

 examples of the members of the present genus. 



An example from the Neuse River, North Carolina, differs from 

 the above in the following: depth 4^; D. iv, 11, i; snout 2^ in head; 

 eye 3|; mouth width 4|; interorbital 2; length 11| inches. 



SCARTOMYZON subgen. nov. 

 Type Ptychostomus cervinus Cope. 

 Branched dorsal rays 9 to 11, usually 9 or 10. Body long, slender, 



