106 



Trocholites midticostatiis, 'Whitea.ves 1884. This volume, pt. 1, p. 36, pi. 6, 



figs. 1 & la.. 

 Discoceras Graftonense, Hyatt 1894. Phylog. of an Acqulr. Character., 



p. 501, pi. 8, figs. 21-23. 



Elora, Dr. R. Bell, 1861 ; Hespeler, T. C. Weston, 1867 and 1871 ; 

 Ourham, J. Townsend, 1878-82 : a few specimens from each of these local- 

 ities. An additional and unusually fine specimen collected by Mr. 

 Townsend at Edge Mills, Durham, in 1885, is nearly two inches and a 

 half in its maximum diameter. It shows that the chamber of habitation 

 occupies fully one-half of the' outer volution, that the sutures of" the 

 septa are crossed by the ribs in much the same manner as those of the 

 preceding species, and that the spaces between the ribs are filled with 

 crowded lines of growth which are parallel to the ribs. 



» 



CRUSTACEA. 



OSTRACODA. 



Leperditia Balthica, var. Gdelphica. 



Leperditia Balthica (Hisinger) var. Guelphica, Jones. .1891. Contr. Canad. Micro- 

 Pal., pt. 3, p. 80, pi. 13, 

 figs. 12, a-b, and 13, a-c. 



Durham, J. Townsend, 1884; three single valves : Urand River at' 

 Aboyne, near Elora, J. Townsend, 1892 ; a right valve sixteen millimetres 

 long. 



Leperditia phaseolus, var. Gdelphica. 



Leperditia phaseolm (Hisinger), var. Guelphica, Jones. ,1891. Contr. Canad. Micro- 

 Pal., pt. 3, p. 86, fig. 5. 



Durham, J. Townsend, 1884 ; one right valve : Grand River at Aboyne, 

 J. Townsend, 1892 ; a large left valve. All the specimens of this and 

 of the preceding species have been kindly determined by Professor T. 

 Rupert Jones, F.R.S. 



TRILOBITA. 



Caltmene Blumenbachii, Biongniart. 



Calymene Blumenbachii, Brongniart 1822. Hist. Nat. Crust. Foss., p. 



11, pi. 1, figs. \a-d, and of subse- 

 quent British and European au- 

 thors. 



