298 

 CRUSTACEA. 



OSTRACODA. 

 ISOCHILINA GRANDIS, Var. LATIMARGINATA, JoneS. 



Cedar Lake, at the north end of Mossy Portage, J. B. Tyrrell, 1889 

 (not 1890) : two loose specimens. 



Saskatchewan River : at the Grand Rapids below Old Portage, three 

 specimens ; below Cedar Lake, one specimen ; at Cross Lake Rapids, one 

 specimen ; and at Roche Rouge, several specimens ; all collected by J. B. 

 Tyrrell in 1890. 



Leperditia Hisingeri, var. fabulina, Jones. 



Saskatchewan River, foot of Grand Rapids, J. B. Tyrrell, 1890 : a right 

 and a left valve. 



Leperditia Hisingeri, var. egena, .Jones. 



Leperditm Hisingeri, va,r. egena, Jones 1891. Contr. Cauad. Micro. -Palaeont., pt. 



Ill, p. 82, pi. 12, fig. 8. 



Saskatchewan River, at Grand Rapids below Old Portage, J. B. Tyrrell, 

 1890 : a few specimens. 



Leperditia phaseolus (Hisinger) Jones. 



Leperditia phaseolus (Siainger) Jones 1891. Contr. Canad. Micro-Palseont. , pt. 



Ill, p. 85, pi. 13, fig.s. 7 and 8. 



Saskatchewan River, at Roche Rouge, J. B. Tyrrell, 1890 : two right 

 valves. 



Leperditia Whiteavesii, Jones. 



Leperditia Wkiteavesii, Jones 1891. Contr. Canad. Mioro-Palaeont., pt. Ill, p. 



87, pi. 12, figs. U, 12, 13, 14, and wood out fig. 6. 



Saskatchewan River : at Old Fort Island, Cedar Lake, one specimen ; 

 and at Chemahawin, eight specimens ; all collected by Mr. J. B. Tyrrell 

 in 1890. 



Leperditia CjECA, Jones. 



Leperditia cceca, Jones 1891. Contr. Canad. Micro-Palaeont., pt. Ill, p. 



88, pi. 12, figs. 6, 7 and 9. 



Saskatchewan River : at Grand Rapids below Old Portage, several 

 specimens ; and below Cedar Lake, three specimens ; J. B. Tyrrell, 1890. 



Trilobita. 

 The trilobites in Mr. Tyrrell's collection from the Saskatchewan are 

 represented by a fragment of a rather large species of Illoenus, from 

 Chemahawin ; and by an imperfect cast of the dorsal surface of the pygi- 

 dium of an Encrinurus, from Roche Rouge. 



