THE NAUTILUS. 139 
impression seen only in anterior half, and there it is very faint. 
Nacre dead-white in front half and iridescent and darker in the 
other half, the two shades meeting in nearly a straight line. Width 
2 inches, length 12, diameter ?. 
Habitat: Neuse River, Raleigh, N. C. 
Remarks: Affinity, U. negatus Lea, from which our shell differs 
in having rounded sides, olive epidermis, thinner and more direct 
teeth. The peculiar structure of the epidermis reminds one of U. 
estabrookianus Lea. Named for Mr. C.S. Brimley, of Raleigh, N.C., 
who is collecting histological material. 
(To be Continued.) 
PLANORBIS NAUTILEUS L. IN AMERICA. 
BY GEO. W. TAYLOR. 
In a note with the above heading in the February number of 
Tae Naovtivus, Mr. Bryant Walker makes the following statement : 
“The occurrence of this well-known European species in the 
United States has hitherto rested upon its discovery at Ann Arbor, 
Michigan, by DeTarr and Beecher, who described it as new under 
the name of P. costatus.” 
This is true, no doubt, as far as the United States is concerned, 
but it is nut correct as to America, for P. nautileus has been already 
recorded from three Canadian localities, and has, apparently, a wide 
distribution in the northern part of the Continent. 
About eight years ago I received two specimens of P. nautileus 
from Mr. A. W. Hanham, who had taken them near Hamilton, 
Ontario. Five years later, in the autumn of 1893, I found the shell 
myself in some abundance in the ponds near to the St. Louis Dam, 
Ottawa. This find I recorded in a note in the Ottawa Naturalist for 
December, 1893, mentioning, | think, in the same note, Mr. Han- 
ham’s previous discovery. Again, in 1894, I received numerous 
specimens of the same shell from Mr. A.O. Wheelen, who collected 
them in southern Alberta. These were also recorded by me in the 
Ottawa Naturalist in a paper entitled “ The Land and Freshwater 
Shells of Alberta.” 
I was inclined, in the first instance, to think that this little shell 
might have been introduced by the agency of man, but its occur- 
