PLATE XXXVIII. 

 Barkandeoceras subcostulatum (page 310). 



Side view of fhe type and only known specimen of .this provisional species, 

 from the Black River limestone at Wolfe Island, near Kingston, which 

 was presented to the Museum of the Survey by Professor James Fowler 

 in 1888. 



The figure is a reproduction of a drawing by Mr. F. E. Calderon. 



