1913.] NATURAL SCIENCES OF PHILADELPHIA. 57 



Mozostoma collapsum (Cope). 



Plychosiomus collapsus Cope, Proc. Amer. Philos. Soc. Phila., XI, 1870, 

 p. 471. Neuse, Yadkin and Catawba Rivers, North Carolina. 



- Nos. 6,949 (type) and 6,950, A. N. S. P., cotypes of Ptychos- 

 tomus collapsus Cope. Neuse River, North Carolina. E. D Cope. 



Also two others "without locality, but probably from the Western 

 States or Great Lakes" (Cope). 



Moxostoma COngestum (Baird and Girard) . 



Four from Del Rio, Texas. 



Moxostoma austrinum (T. H. Bean). 



Three from Rio Verde, Mexico. 



Moxostoma robustum (Cope). 



Ptychostomus robust us Cope, Proc. Amer. Philos. Soc. Phila., XI, 1870, 

 p. 473. Yadkin River, North Carolina. 



Head 4f ; depth 3| to 3|; D. iv, 11, i, or iv, 12, i; A. iii, 6, i; V. 

 all I, 8; scales 41 to 45 in lateral line to caudal base, and 3 more on 

 latter; 6 or 7 scales above lateral line; 5 scales below lateral line; 

 15 to 17 predorsal scales; snout 2^ to 2| in head; eye 4; mouth 

 width 4§ to 5|; interorbital 2; length 10^? to 11| inches. No. 

 6,958 and 6,959, A. N. S. P., cotypes? of Ptychostomus robustus 

 Cope. Yadkin River?, North Carolina. E. D. Cope. 



These examples agree with Cope's account in the compressed 

 and rather stout body, moderate head and few dorsal rays. 

 Moxostoma erythrurum (Rafinesque). 



Ptychostomus bucco Cope, Rep. Geol. Surv. Wyom. Hayden, 1870 (1871), 

 p. 437. St. Joseph, Missouri. 



Nos. 6,961 to 6,964, A. N. S. P., cotypes of Ptychostomus bucco 

 Cope. St. Joseph, Missouri. 



Three without data; forty-nine from the Holston River, Virginia; 

 two from the Catawba River and three from the French Broad 

 in North Carolina; twelve from the Blue River and one from the 

 Wabash River, Indiana; one from Sedalia, Missouri; one from Ot- 

 tumwa, Iowa. 



Also a large series of Pennsylvania material from the Youghio- 

 gheny River, Kiskiminitas River and Indiana County at Cowan- 

 shanoc, Elders Run, Grant Township, Home Run in Payne Town- 

 ship, Indiana, Pine Township and Cherry Run. Most of these have 

 been recorded as Moxostoma aureolum, in accordance with subsequent 

 restriction to that by Cope in 1870. An examination of all the 

 material before me, however, appears to justify Cope's conclusions, 

 and for that reason I allow the large-headed species to fall with 



