46 
Camarotoechia cf. endlicki (Meek) 
1875. Rhynchonella endlichi Meek, U.S. Geol. and Geog. Surv. Terr., 
Bull. 1 (2nd ser.), p. 46; White, 1883, U.S. Geol. and Geog. Surv. 
Terr., 12th Ann. Kept., p. 133, PI. 33, fig. 4, PI. 36, fig. 2; Camar- 
otoechia endlichi Girty, 1900, U.S. Geol. Surv., 20th Ann. Kept., pt. 
2, p. 56, PL 6, figs. 1-4, PL 7, fig. 1; Kindle, 1909, U.S. Geol. Surv., 
Bull. 391, p. 21, Pl. 6, figs. 10-11 a, PL 7, figs. 1-2. 
Remarks. These specimens probably fall within the limits of this very 
variable species as figured rather fully by Girty. They differ from Meek’s 
description in having a rounded instead of a flat-bottomed sinus and in 
having fewer radial plications. In Girty’s discussion of specimens from the 
type region, he says that the species is exceedingly variable in the character 
of its plications, and Kindle figures a specimen from New Mexico which 
shows no lateral plications and six or seven weak ones upon fold and sinus. 
Locality and Horizon . Upper Devonian of Colorado and New Mexico. 
In the Minnewanka region in the Upper Devonian of section 2-38 (r). 
Camarotoechia deganhda Rowley 
1900. Camarotoechia elegantvla Rowley, Am. Geol., vol. 25, p. 264, Pl. 5, 
figs. 44-47; Weller, 1914, State Geol. Surv., 111., Mon. 1, p. 177, 
Pl. 24, figs. 1-8. 
Remarks. The Minnewanka form agrees quite closely with this 
Missouri species as described and figured by Rowley and Weller. The 
Alberta shell is slightly less thick and has a somewhat narrower sinus. 
C. tuta (Miller) is a smaller shell with length and breadth subequal or 
somewhat longer than wide. 
Locality and Horizon. Mississippian of Missouri. In the Minne- 
wanka region in the Mississippian of sections 2, 23 (r), 24 (?), 25 (r), 26 (r), 
27 (?); 4-3 (c). 
Genus, Paraphorhynchus Weller 
Paraphorhynchus obscurum n. sp. 
Plate VII, figures 1, 2, 3 
Description . Shell of medium size, longer than wide. The lateral 
margins of the umbodal region extend from the beak in almost straight 
lines for a third and a half the length of the shell. The dimensions of two 
pedicle valves slightly above the average size are: length 32 mm., 30 mm.; 
greatest width (a little anterior to mid-length) 25 mm., 25 mm. A brachial 
valve gives similarly 27 mm., 22 mm. Another specimen, likewise an 
internal mould, has a probable length and breadth of 28 mm. and 23 mm., 
and a thickness (immediately posterior to mid-length of shell) of 15 mm. 
Pedicle valve rather strongly arched from beak to front, omitting 
the variable lingual extension; greatest convexity in posterior region. 
At mid-length of valve or slightly posterior to it arises a broad, rather 
shallow, rounded median sinus, which increases in width rapidly so as to 
occupy the entire width of the valve anteriorly; at the front of the valve 
it bends downward quite rapidly, forming at times an angle of 120 degrees 
to the plane of the valve, and producing a more or less lingual extension. 
Laterally from the median sinus the surface of the valve is almost flat. 
