WHiTEAVES.] FOSSILS OF HAMILTON FORSIATIOX OF ONTARIO. 119 



II., p. 60, pi. 5, fig. 2), and more especially to the original of the wood- 

 cut (fig. 30) on page 60 of that volume. P. affine, however, is stated 

 to have been collected from rocks which are " nearly of the age of the 

 Oriskany Sandstone," and its sculpture is said to consist of '• fine 

 transveree striae with a few obscure undulations." 



CEUSTACEA. 



TRILOBITiE. 



Daljlanites Helena, Hall. 



DaJmania Hdma, Hall. 1S62. Fifteenth Rep. X. York St. Cab. Xat. Hist, p. 89. 

 Balmaniks Helena, Hall. 1S76. Illustr. Dev. Foss., pi. 13, figs. 11 and 12. 



Township of Plympton, A. Murray, 1848 : two fine specimens of the 

 pygidium. It is somewhat doubtful, however, from what formation 

 and locality these specimens were really collected. The printed label 

 on the tablet upon which they were placed by Mr. E. Billings many 

 years ago, states that they were collected by Mr. Murray from the 

 Hamilton Formation of the Township of Plympton, but to one of them 

 is afiB-xed a label in ili-. Billings hand writing, marked " Nanticoke, 

 Walpole,'' so that one of them, if not both, may have come from 

 the Corniferous Limestone. Professor Hall's specimens of D. Helena 

 are said to have been obtained from the Upper Helderberg Group (the 

 equivalent of the Corniferous Limestone) of the State of Ohio and New 

 York. 



FISHES. 



^LiOROPETALICHTHTS SULLIVANTI, Ncwbcrry. 



Agasxichthys Svllkanti, Xewberry. 1857. Bull. Nat. Inst., p- 3. 



Macropetalichihys Svllironti, Newberry. 1862. Am. Journ. Sc. and Arts, Series 2, 



vol. XXIV., p. 7.5. 

 " " 1873. Rep. Geol. Surv. Ohio, Vol I., pt. 2, 



p. 294, pi. 24, and pi. 25, figs. 1 and la. 



Numerous fragments of the cranial plates of this species, ornamented 

 on their exterior by the characteristic stellate tubercles, were collected 

 by the Eev. Hector Currie near Thedford in 1882, and by the Eev. J. 

 M. Goodwillie in the same year on the banks of the Sable Eiver near 

 Bartlett's Mills. Similar fragments are not infrequent in the Cornife- 

 rous Limestone of Western Ontario, and a few were found by Dr. E. 

 Bell in 1875, on the Mattagami, a branch of the Moose Eiver, in the 

 Hudson's Bay Territory, in rocks apparently of similar age. 



