242 OONTKIBDTIONS TO OANADEAN PAL/EONTOLOGY. 



cast of the interior of both valves, which very closely- resembles the 

 specimen of this species tigui-ed bj^ Prof Hall on plate Ixxv, fig. 45, of 

 volume five, part 1 (Lamellibranchiata,) of the Pateontology of the 

 State of New York. 



GASTEROPODA. 



EuoMPHALUs (Straparollus) inops, Hall. 



Plate 31, fig. 3 and 3a . 



EiiomplialuK inops, Hall. 187G. Illustr. Devon. Foss., Gasterop., pi. Id. 

 Eaomphahts (SiraparoUus) inopf, Hall. 1879. Pal. N. Y., vol. V, pt. 2, p. 58, pi. 

 xvi, fifj. 5. 



Mackenzie River, at the " Ramparts," II. G. McConncU, 1888: three 

 specimens which agree remarlcably well with the description and figure 

 of the E. inops of Hall, from the Schoharie Grit of the State of N"ew 

 Y<n'k, especially in the peculiar concavitj' of the unbilical area, though 

 it must be born in mind that Pi-of. Hall's species was based upon a 

 single imperfect cast of the interior of the shell and that its characto-s 

 therefore are very imperfectly understood. 



BtrojiPHALus (Straparollus) flexistriatds. (N. Sp.) 

 Plate 31, figs. 2 and "a. 



Shell small, discoidal, spire depressed below the highest level of the 

 outer volution. Volutions rather slender, coiled on nearly the same 

 plane, contiguous and increasing gradually in si^o, their number uncer- 

 tain, as neai'lj^ the whole of the inner ones ai-e broken otf in the only 

 specimen collected, but probably, when entire, about three or four; 

 outer volution compressed above and below and nari'owly rounded on 

 the peripheiy ; umbilicus occupying nearly one third of the entire 

 diameter of the base ; aperture transversely elliptical, its lower portion 

 occupying a little more than one third of the entire basal dianreter. 



Surface marked by simple and flexuous transverse stria3 of growth. 

 On the base of the only specimen colloctod, commencing at the umbi- 

 lical margin, these stria:' at fii-st curve gently and concavely backward, 

 then obliquely forward and outwai'd until they reach the centre of the 

 periphery, after which their course cannot be traced, as they are not 

 preserved on the upper side. 



