76 COXTMBUTIONS TO CANADIAN PALEONTOLOGY. 



(Ti'eatest length, three millimetres and a half: maximum breadth or 

 convexity, a little over one mm. : length (or height) of body-whorl, 

 about one mm. 



Belly Eiver, east side of Driftwood Bend, G. M. Dawson, 1881 : 

 one nearly perfect specimen with the test preserved. ISTorth side of 

 Milk Eiver, five miles below Pa-kow-ki Coulee, G. i\I. Dawson, 1881 : 

 a cast of the interior of the shell. 



This little species appears to be much slenderer than any of the 

 2^orth American fossils which have been referred to the genus 

 Hydrohia with the exception of the H. recta of White,* and the latter 

 shell has a totally ditterent outline to the present one, is said to attain 

 to a length of eighteen millimetres and to have apparently twelve or 

 more volutions. 



Vivii'ARDS CoNRADi, Meek and Hayden. 



Paludina C'o/irarK, Meek and Hayden. ISriH. Proc- Ac. Nat. Sc. Phil., vol. VIII., 

 p. 121'. 

 " " Meek and Hoyden. 1860. lb., vol. XII, p. 185. 



Meek, 187r,. Rep. U. .S. Geol. Surv.Terr., vol. IX, p. .579, pi. -12, 



figs. 15, a, Vi, c, d. 



White, (as of M. and H.) 1880. U. S. G(-ol. Surv. Contr. to Pal., 



Xos. 2-8, p. 100. 



Wlilte (as of M. and H.). 1883. Eev. Xon-Marine Foss. N. 



Am., p. 61, pi. 24, figs. 4, 5 and (>. 



South Saskatchewan, six miles below the mouth of the Bow Eiver 

 and thirty-five feet above the water level, G. M. Dawson, 1881 . large 

 and abundant. South side of Milk Eiver, one mile above the mouth of 

 Pa-kow-ki Coulee and forty feet above the water level, G. M. Dawson, 

 1881 . one specimen. South Saskatchewan, one mile below the mouth 

 of the Bow Eiver, T. (_'. Weston, 1833 . not unfrequent. 



*" Oescribed on [>. Vj2 of Powell's Rep. oa the Geoli>^^\' of the Uinta ^Ljuntain?, and figured on 

 idiite iT, fig .K. of Dr- C- A- White's Review "f the Xon-Marine Fossil Jlolhisea of X. America- 



