1898] Whiteaves — On SOME Fossil Cephalopoda. 121 



Levis limestone at Pointe Levis, opposite Quebec City, 

 T. C. Weston ; a single specimen, which seems to be quite dis- 

 tinct from all the species of Cyrtoceras from that locality, 

 described by E. Billings in the first volume of "Palaeozoic Fossils." 



BaRKANDEOCERAS SUBCOSTULATUM. (Norn, prov.) 



Shell consisting of about two gyroceran volutions which are 

 coiled loosely on the same plane, but nowhere in close contact, 

 and gradually becoming more eccentric, the outer one slightly 

 compressed both above and below, so that the outline of a 

 transverse section near the aperture would be broadly elliptical, 

 and the dorso-ventral diameter a little greater than the lateral. 



Surface of the test distinctly costulate, though in the only 

 specimen that the writer has seen the ribbing is most clearly 

 defined on the inner volution where it consists of rather distant 

 but irregularly disposed, small, thin, acutely angular and slightly 

 flexuous, transverse libs or ridges, which are generally much 

 narrower than the very shallow depressions between them, and 

 marked with numerous minute stnations parallel to the ribs. 

 Sutures of the septa not clearly indicated ; shape and relative 

 position of the siphuncle unknown. 



Black River limestone at Wolfe Island, near Kingston ; a 

 fine specimen fully four inches in its maximum diameter, which 

 was presented to the Museum of the Survey by Professor James 

 Fowler in 1888. 



According to Hyatt, B. convolvans (the Lituites convolvans 

 of Hall but apparently not of Hisinger), of the Black River 

 limestone of the State of New York, has a smooth shell, though 

 its shape appears to be essentially similar to that of the speci- 

 men from Wolfe Island. 



LiTOCERAS versutum, Billings. (Sp.) 



Nautilus versutus, Billings. 1865. Geol. Surv. Canada, Palajoz. 



Fossils, Vol. I, p. 259. 

 Litocems versutuM, Hyatt. 1883. Genera of Fossil Cephalo- 



pods (Proc. Boston Soc. Nat. Hist., Vol. 



XXII) p. 268. 



