WHiTEAVES.] FOSSILS OP HAMILTON FOEMATION OF ONTARIO. 397 



MOLLUSCA. 



PELECYPODA. 



AcTlNOPTERiA BoYDii, Conrad. (Sp.) 



For the synonymy of this species, with references, see xjart 3 of this volume, p. 239. 



A few detached valves of A. Boydii were collected by the writer in 



1891 on the banks of the Riviere aux Sables at Bartlett'a Mills and at 



Hill No. 4, near Thedford. Similar specimens were obtained by Mr. 



Schuchert in 1895 at Bartlett's Mills. 



Leiopteria Rafinesquii, Hall. 



Lcioptcria Rafinesquii, Hall. 1883. Pal. N. York, \ol. V., pt. 1, Plates and E.xplanations, 

 pi. 15, fig. 11 : and pi. 20, figs. and 7. 

 M 1881. Pal. N. York, vol. V., pt. 1, Lamellibr.,^, p. 161, pi. 

 15, tig. 11 ; pi. 20, tigs. ,6 and 7 ; and pi. 88, tigs. 27 and 28. 



A few years ago the writer was informed by Professor Calvin that he 

 had found a specimen of L. Rafinesquii in the Thedford region, and Mr. 

 Schuchert writes that he collected a specimen, which he identifies with 

 this species, in the " Upper third of the section" at B-irtlett's Mills. The 

 only Leiopteria from the Hamilton formation of Ontario that the writer 

 has seen is a left valve, with only a portion of the posterior wing pre- 

 served, from Bartlett's Mills, in the collection of the Rev. Hector Currie, 

 and it looks quite as much like L. Dekayi, Hall, as L. Haji iiesquii. 



LiMOPTEP.A macropteea, Conrad. (Sp.) 



Limn macropter'j, Conrad. 1838. Ann, Rep. N. York Geol. Surv., p. 117. 

 Limoptera macroptera. Hall. ISIill. Prelim. Notice Lamellibr. Shells, &c., pt. 2, p. 17. 

 1883. Pal. N.York, vol. V., j.t. 1, Plates and E.xplana- 

 tions : pi. 24, fig. 14 ; pi. 2G, tigs. 6-9 ; pi. 27, tigs. 1-10 ; 

 pi. 28, tigs. 4 and 5 ; and pi. 29, tigs. 1-4. 

 ,1 I, ,, 1884. Ibid., p. 246, plates as in last reference, but add pi. 



92, figs. 4-9. 



Mr. Schuchert collected a cast of the interior of an aviculoid shell, 

 which he identifies with this species, in the " Middle third of the section," 

 at Bartlett's Mills in ISg.'i. This specimen, which the writer has exami- 

 ned, is No. 26,492 of the United States National Museum Catalogue of 

 Invertebrate Fo.ssils. 



Cypricardella bellistriata ? Conrad. 



For a list of the synonyms of this species, with references, see page 308 of this volume. 



Three casts of the interior of small shells, which are probably young or 



small individuals of this species, have recently been collected at Bartlett's 



