THE NAUTILUS. 7 
just above thistill. Dr. Coleman, of the School of Practical Science, 
collected and sent a number of the species to Dr. Dall and C. T. 
Simpson, who identified them as follows: U. phaseolus, U. clavus U. 
pustulosus, U. pustulusus var. schoolerafti, U. occidens (?), U. luteolus, 
U. undulatus, U. rectus, U. trigonus and U. solidus. 
Besides these a number of other shells have been found, viz.: 
Pleurocera subulare, P. elevatum, Goniobasis, Valvata sincera, V. bi- 
carinata, Campeloma decisum, Amnicola, Physa, Planorbis, Pisidium, 
Sphaerium, ete. 
A peculiar fact is the comparative rarity of Campeloma, Planor- 
bis and Physa, shells which are very abundant to-day in the waters 
of the Don. Of the 10 species of Unios identified by Dr. Dall and 
Mr. Simpson only U. luteolus and U. rectus are found here to-day. 
Unio phaseolus and U. undulatus have been found in small numbers 
in Lake Erie, but not in Lake Ontario. 
Three of the species, Unio pustulosus, U. solidus and U. clavus are 
not found to-day in the St. Lawrence drainage system at all, but are 
confined to the Mississippi area where they are extremely common. 
The presence of the Mississippi forms seems to indicate that the 
climate existing during the first interglacial period was somewhat 
more southern than it is to-day, and this conclusion is also borne 
out by the nature of the plant remains. 
Along the shores of Lake Ontario to the east of Toronto is a long 
line of cliffs known as Scarboro’ Heights, composed entirely of Drift 
deposits. Only a very few shells have as yet been found here, but 
the beds are very rich in insect and plant remains. 
The deposits along the Don River have yielded by far the most 
interesting results in the shell line. 
QUATERNARY FOSSIL SHELLS, LONG BEACH, CALIFORNIA. 
[Excerpts from report of Julia E. Campbell, 1896). 
One day in April, 1896, while out for wild flowers, we drove to 
Signal Hill, which lies back from the ocean about 23 miles. Down 
one side of the hill runs a narrow ravine or little cafion as it is often 
called. | 
While climbing up in the center of this ravine we found the banks 
on either side literally filled with fossil shells. We secured the fol- 
lowing species, viz. : Nassa mendica Gld., N. perpinguis Hds., Den- 
