, SPEXCER — NIAGARA FOSSILS. DO7 



in that species is acutely oval and the strise extend farther into the 

 shell. Mr. Billings, several years ago, placed a label on a species 

 from Hamilton, D. fonnosa. From memory, it appears to have 

 been this species, but he never described such a name ; and con- 

 sequently, in case this species does not stand, I have called it 

 C. clara. 



Formation and Locality. — It is a common Niagara species at 

 "Jolly-cut road," Hamilton, Ontario. 



Crania anna, nov. sp. 



Plate 8. Fig. 4. 



Shell small suborbicu'lar, broader than long ; dorsal valve con- 

 vex, showing faintly the lamellar lines of growth, and strongly the 

 sharp elevated radiating stride ; apex of dorsal valve subcentral 

 and prominent. 



Of this species three specimens are known. In breadth, they 

 measure from seven to nine millimetres, with a height of about 

 two-thirds that measurement. Only the convex limpet-like dorsal 

 valve is known. 



Formation and Locality. — This species was found in the 

 "chert-beds" of the Niagara formation at Hamilton, Ontario, by 

 Col. Grant. 



Pleurotomaria clipeiformis , nov. sp. 

 Plate 7. Figs. 6 & fia. 



This shell is flattened-suborbicular in form, with four volutions, 

 of which the inmost is indistinct. The whole are slightly convex 

 with rounded margins, that above overlapping the one beneath. 

 The whorls increase in breadth as they approach the surface, the 

 imier being half a centimetre and the outer one centimetre wide. 

 The diameter of the shell is about five centimetres. This shell 

 is only known as a cast, with a nearly smooth surface. 



Formation and Locality. — This fossil was obtained from Mr. Ed- 

 ward McLaughlin, and is from the upper beds of the Niagara 

 limestones near Hamilton, Ont. 



CoNULARiA MAGNiFiCA (Spencer). 



. Plate 9. Fig. 1; Figs. \a & lb, outer and inner surface, enlarged. 



Conularia magnifica (Spencer), Can. Nat., vol. ix., No. i, 1879. 



Shell large, broad, pyramidal ; marginal angles with shallow 

 channels ; each side marked with an inconspicuous medial de- 

 pression ; transverse stria; very fine, and closely arranged in a 



