PROCEEDINGS OF THE ACADEMY OF 



[Feb. 



Fig. 3. — Rutilus olivaceus (Cope). (Type of Siphaleles . vitlatus Cope.) 



are given as 4 — 5. I find in the above series 38 examples have the 



teeth 5 — 5, and 19 examples have 5 — 4. 



Rutilus thalassinus (Cope). Fig. 4. 



Myloleucus thalassinus Cope, Proc. Acad. Nat. Sci. Phila., 1883, p. 144. 

 Goose Lake, Oregon. 



Head 3^ to 3|; depth 31 to 4^; D. iii, 8, i, rarely iii, 7, i; A. iii, 

 7, I, occasionally iii, 8, i, rarely iii, 6, i; scales 42 to 50 in 1. 1. to 

 caudal base, usually between 46 and 49+2, rarely 3, on latter; 10 

 scales above 1. 1., rarely 9 or 11; 7 scales below 1. 1., frequently 6, 

 rarely 5; 20 to 25 predorsal scales; snout 3| to 4 in head; eye 3| to 

 7; maxillary 3i to 3|; interorbital 2f to 3f; teeth 5 — 4; length 3j\ 



Fig. 4. — Rutilus thalassinus (Cope). (Type of Myloleucus thalassinus Cope.) 



