FISHES OF THE ROCKY MOUNTAIN REGION 175 
11. Back unspotted, but strongly marbled. with dark olive or black; dorsal and caudal 
fins mottled (Allen’s Park, Boulder Co., Colo., September 6, 1907. S. A. Rohwer, 
doubtless introduced; Montana, introduced) . . Salvelinus fontinalis Mitchill. 
(Eastern Brook Trout.) 
Back with red spots, like those on sides, but smaller and usually paler; no dark marb- 
ling above (West Montana, native). . . - - ; Salvelinus parkei Suckley. 
(malma auctt., not Walbaum) 
(Dolly Varden Trout). 
Famity Gonorhynchide 
Notogoneus osculus Cope, is from the Green River shales. 
Famity Osteoglosside 
Phareodus acutus Leidy, is from the Bridger Eocene of Wyoming. P. equi pinnis (Cope), 
P. encaustus (Cope), and P. testis (Cope), are from the Green River beds of Wyoming. 
Dapedoglossus Cope, is the same genus. 
Famity Thymallide (The Graylings) 
The Montana Graying, Thymallus ontariensis montanus (Milner), occurs in the 
tributaries of the Missouri River in Montana. Dr. Henshall, following Milner, treats this 
as a distinct species, T. montanus. It is in fact separated by a long distance from the habi- 
tat of T. ontariensis in Michigan, and should logically stand as a species, but its distinctive 
characters are few. Jordan and Evermann say: “Entirely similar to the Michigan grayling, 
but the dorsal a little smaller.” 
OrpER HAPLOMI 
Famity Luciide (The Pikes) 
Ischyrhiza antiqua Leidy, is from the Fox Hills Cretaceous of New Mexico. 
Famity Peeciliida (The Killfishes) 
Sides with many dark crossbars; dorsal rays 14 or 15 (Boulder County, Juday; Pueblo, 
Colo; New Mexico). .-- - - +. . F undulus zebrinus Jordan and Gilbert. 
Brownish, finely dotted; lips, top of head, and line along middle of back dark; dorsal rays 
11 (Wyoming) sh nae . . . FF. lineatus Garman. 
Olive gray, scales with ochre borders; fins yellow, edged with red; dorsal rays ro (Boulder 
County, Juday; Denver, Colo.; ArkansasR.) . . - - F. floripinnis, Cope. 
