Palceozoic Bivalced Entomostraca. 341 



a specimen apparently the same as " 639," but much buried 

 on the dorsal border. 



" 634." Various specimens of larger or smaller individuals, 

 much like those in " 639," " Murray Bay." 



" 634," " 55 " on blue label, and " 927." From the same 

 locality. 



Leperditiiij near L. louckt'ana, Jones ; together with small 

 forms, probably Frimitice. 



On a tablet without a number : " Black River, Poiute 

 Claire." 



Leperditia louckiana^ Jones, near to " 639," larger than 

 " 635 ;" ^\ inch long, about i high. 



Without a number : " Leperditia^ Black River, Pointe 

 Claire." Leperditia louclcianal 



3. Leperditiajosephianay Jones. 



Leperditia canadensis, var. josephiana, Jones, Aun. & Mag. Nat. Hist. 



18o8, ser. 3, vol. i. p. 341 ; (jieol. Surv. Canada, 1858, dec. iii. p. 94, 



pi. xi. tig. 16. 

 Leperditia fabulites (Conrad), var. josephiana, Jones, Ann. & Mao*. 



Jsat. Hist. 1881, ser. 5, vol. viii. p. 344, pi. xix. fig. 7, pi. xx. figs. 7, 



8, and p. 345, pi. xx. fig. 4 P 



Speciviens in the McOill University Museum. Labelled 

 " 55 " on yellow label, and " 927," " Murray Bay, Tren- 

 ton ? " A dark grey fine-grained limestone. 



Leperditia fabulites y Conrad, var. josephiana^ Jones, or, as 

 I now prefer to call it, L. josephiana, Jones. Eye-spot very 

 feeble ; valve f inch long, f high. 



L. josephiana has been found in the " Trenton Limestone." 



" 55*" on yellow label, and " 927." The same locality. 

 Dark grey limestone, with valves and carapaces on bed-plane 

 and scattered throughout. 



Lepjerditia josephiana^ Jones. Valves -^^ inch long and 

 yS^high. 



Together with a broader (higher) form, L, louckiana?. 

 smaller than '' 639." 



4. Leperditia anticostiana, Jones. 



Leperditia canadensis, var. anticostiana, Jones, Aun. & Mag. Nat. Hist. 



1858, ser. 3, vol. i. p. 341 ; Geol. 8urv. Canada, dec. iii. 1858, p. 95, 



pi. xi. tig. 17. 

 Leperditia fahidites (Conrad), var. anticostiana, Jones, Ann. & Mag. 



Niit. Hist. I88l, ni^v. 5, vol. viii. p. 344, pi. xix. fig. 8. 



In iJic }fcGill University Museum. LubcUei "■ 1125." 



