PLEISTOCKXE FOSSILS. 219 



This species is rare in the Pleistocene, but very common in all parts 

 of tlie gulf of St. Lawrence at present. Also west coast liritish 

 Columbia. * 



(.S) /lo/ot/uirhhn. 

 Psoitis [Lophothiifhi) Fahricli, Diir. and Ivor. 



Scales of an animal of this kind have been found in the Leda clay at 

 Montreal. Tiiey may belong to /'. phftiitopnn, or to the species 

 /'. (Lophot/inrki) Fahrh'ii, also found on our coasts ; from the form of 

 the plates, I suppose most likely to the latter species, and to a young or 

 small individual. /*. Fahricii is very abundant at Little Metis, where 

 the other species also occurs. 



PROVINCE MOLLU.SCA. 



Iiitrodiidor//. — In prei)aring this, the largest and most 

 important ])art of my catalogue, I have to acknowledge 

 my obligations to the late Dr. P. P. (Jari)enter, iov his 

 kind aid in comparing dl the more critical species of 

 shells, and in giving me his valuable judgment a,s to their 

 relations and synonymy, which I have in nearly every 

 ca.se accepted as final. I am also indebted to Dr. Carpenter 

 for many of the notices of West-coast shells. 



To Mr. J. F. Whiteaves, F.d.S., I am indel)ted for 

 reviewing tlie Polyzoa and comparing them with Smitt's 

 Xorwegian catalogues, and also for many valuable facts as 

 to shells obtained in his dreilgings in the gulf of 8t. 

 Lawrence. The Uev. T. Hincks, F.K.S., has also given me 

 valuable information on the Polyzoa. 



To the late Mr. J. ( rwyn dettreys, F.P.S., and the late 

 Mr. R M< Vndrew, F.K.S., of London, my grateful acknow- 

 ledgments are due for aid and information, aiul also for 



* Names of recent shells from British Columbia, except when other- 

 wise ci'edited, are (quoted from papers of Mr. Whiteaves on collections 

 of Dr. G. M. Dawson; Trans. R. 8. Canada, Vol. IV., 188G; Geol. 

 Survey of Canada, 1878 9. 



