368 CONTRIBUTIONS TO CANADIAN I AL/EONTOLOGY. 



HYDROMEDUS^. 



HYDROIDA. 

 Clathrodictyon RETiFORME, Nicholsoii and Murie. (Sp.) 



Sttjlodicii/on retiforme, Nicholson and Murie. 187^. Journ. Linn. Soo., Zoology, vol. 



XIV., ji. 222, y.l. 2, fig. 14, and pi. .S, fipH. 13. 

 Clathrodictimn retiforme, Nicholson. ISH". Ann. and Mag. Nat. Hist., Ser. .0, vol. XIX 

 !>. 13, i>l. 3, figs. (5-S. 



" Rare in the Hamilton formation (Devonian) at Arkona, Ontario," 

 where it was di.scovered by Dr. G. J. Hinde. Nicholson. 



StROMATOPORA MAMILLATA, NicholsOn. 



Stroniatopora riianiiaillata, Nicholson. 1S73. ,\nn. and Mag. Nat. Hist., Ser. 4, vol. 

 XII., p. 04, pi. 4, fig. 4 ; and (1H74) Rep I'al. Prov. Ontario, 

 p. 17, pi. 1, fig. 4. 



Mr. iSchuchert refers to this species a few t^ood specimens that he collect- 

 ed from the '' Middle third of the .section " at Bartlett's Mills, and that are 

 No. 26,596of theUnitedStates National Museum Catalogue of Invertebrate 

 Fossils. It is to be observed, however, that the types of 6'. inandllala 

 are from the Corniferous limestone, that tliey have not yet been examined 

 microscopically, and that no microscopic sections ha\ e been made of any 

 of Mr. Schuchert's specimens. 



Stromatopoeella incudstans, Hall and Whitfield. (Sp.) 



Stromatopora (Ccenostroma) iiurtut'ins, Hall and Whitfield. 1873. Twenty-third Rep. 



N.^'. iSt. Cal). Nat. Hist., p. 227, pi. 9, fig. 3. 

 Stromatopora v.idliporoidex, Nicholson. 187.'5. Rep. P.il. Prov. Ontario, p. 78. 

 'SiromatoporeHii, ineraatans, Nicholson. ]S!II. Ann. and Mag. Nat. Hist., .Ser. 0, vol. 

 VII., i.p. soil and 310, foot note. 



" Hamilton formation ; Arkona. Also in the Corniferous Limestone, 

 Port Colborne." Nicholson. The species is abundant in the neighbour- 

 hood of Thedford. 



ECHINODERMATA. 



CRINOIDEA. 

 GiLBBRTSOCRINUS SPINIGERUS, Hall. ((^p.) 



Tremntocrinus spiniyerus. Hall. 1862. Fifteenth Rep. N. York ,St. Cab. Nat. Hist., 



p. 128. 

 Gonicisteroidocrinus xpinirjcms. Meek and "Worthen. 1806. Oeol. Surv. Illinois, vol. 



II., I). 222. 



S. A. .Miller. 1877. Cat. Anier. Pali^oz. Fossils, p. 80. 



