22(j CONTRIBUTIONS TO CANADIAN PAL/EONTOLOOV, 



Spirifera (M.) MERisToiDES, Meek. 



Spirifcr (Martinia) mcristoidcs, Meek. 1868. Trans. Chicago Ac. Sc, vol. I, p. 

 106, pi. xiv, figs. J a-b. 



Mackenaie River, at the " Eampavts," II. G. MeConnell, 1888: twentj-- 

 six specimens, most of whicli are jjerfect or jiearly perfect aud in good 

 condition. 



On page 142 of the " Pahvontology of the J']ureka District,'' Mr. 

 Walcott expresses the opinion that the S. {M.) meristoides, as described 

 and figured by Meek, is identical with Wiq Athyris Maia of Billings and 

 the Spirifera Maia of Hall. The specimens from the "Eamparts," how- 

 ever, most of which have the appearance of adult shells, are uniformly 

 smaller than the typical A. (or ;S'.) j\[aia, and show no trace of a mesial 

 fold in the dorsal valve or of a corresponding sinus in the ventral, both 

 of which features are mai-ked charactei-s in full grown examples of Mi-. 

 Billings' sjjecies. 



Spirifera (M.) liiciiARDsONi, Meek'. 



Spirifer (Martinia) RicharcUovi, Meek. 1808. Ti-ans. < 'hica.c;o Ac- f^c, vol. I, p. 

 104, pi. xiv, fig. 2. 



Athabasca Eiver, opposite La Saline, Dr. E. Bell, 1S82 : one small 

 specimen, about half the size of the one figured by Meek, but perfect 

 and with the whole of the test preserved. In this specimen, which is 

 obviously immatui'e, the mesial fold and sinus are not develoiied. Its 

 surface appoai-s to be smooth to the naked o)'e, but when examined 

 under the lens it is seen to be marked with a lew more or less distant 

 concentric striaj, or lines of growth, and with twelve or thirteen taint, 

 rounded and radiating plications. Mr. Walcott (o]). (■it.,pp. 143 and 

 144) is inclined to think that S. (M.) Richardsoni is one of the Ibrms of 

 8. uiidi.fera, Eiemer. 



CvRTiNA HajMilxonensis, Hall. 



Cijrtia HamiUo-ncnsia, Hall. 1857. Tenth Kep. llofj;. N. Y. St. Cab. Nat. Hist., p. 



166. 

 Cijrlia Hamillonensin, mWmgs,. 1861. Canad. Journ.,N. Ser., vol. VI, p. 262, figs. 



80-82. 

 Cyrtia Hamiltoncnsis, Billings. 1863. Geol. Canada, p. 384, figs. 415a-c. 



