70 PROCEEDINGS OF THE ACADEMY OF [Feb., 



Eutilus symmetricus (Girard). Fig. 6. 



Pogonichthys symmetricus (Baird and Girard) Girard, Proc. Acad. Nat. 

 Sci. Phila., 1854, p. 136. Fort Miller, San Joaquin Valley, California. 



Head 3| to 4; depth 3f ? to 4|; D. usually in, 7, i, rarely in, 8, i; A. 

 Ill, 7, i; scales 52 to 56 in 1. 1. to caudal base+2 to 4 more on latter; 

 12 scales above 1. 1., rarely 13; 7 or 8 scales below 1. 1.; usually 32 

 predorsal scales, rarely 28 or 31; snout 3 to 3j in head; eye 3f to 4f ; 

 maxillary 3 to 3f; interorbital 2f to 3; teeth 5 — 5 or 5 — 4; length 

 3| to 5| inches. 



Nos. 5,330 to 5,333, A. N. S. P., cotypes of Pogonichthys symmetri- 

 cus Girard. Dr. A. L. Heermann. From the Smithsonian Insti- 

 tution (No. 191). 



-Rutilus symmetricus (Girard). (Cotype of Pogonichthys symmetricus 

 Girard.) 



An example from northern California? (Cope) is also identical. 



This species approaches the physiognomy of Leuciscus, and differs 

 at once from all of our American Rutilus in the protruding snout 

 and included mandible. Although Rutter retains Algansea formosa 

 Girard as a synonym^, it differs in the projecting mandible. 



Rutilus formosus (Girard). Fig. 7. 



Algansea formosa Girard, Proc. Acad. Nat. Sci. Phila., 1850, p. 183. Mercede 

 and Mohave Rivers. 



Head 3| to 3|; depth 3| to 4|; D. usually in, 7, i, frequently 



III, 8, i; A. Ill, 7, I, rarely in, 6, i; scales in 1. 1. to caudal base, usually 



50, frequently 52, sometimes 51 or 47, occasionally 49 or 53, seldom 



48, rarely 46+usually 3, occasionally 4, rarely 2; usually 12 scales 



5 Bull. Bur. Fisher., XXVII, 1907 (1908), p. 137. 



