6 THE NAUTILUS. 
the latter it differs in its shorter dorsal line, more pointed posterior, 
red ligament and greater length. It has the outline of U. Genthii 
Lea but it is darker, rayless and the teeth are heavier, the single 
lateral being uniformly tapered off to its posterior end instead of 
ending abruptly. Twelve specimens were taken along with U. 
succisus (cacao) Lea, U. inerassatus Lea, var. boykinianus Lea and 
neisslerit Lea, var. 
We name it in honor of our esteemed friend, Dr. W.S. Strode, 
of Lewiston, Ill. 
U. cylindricus Say, var. strigillatus nov. 
The chief distinguishing characters of this variety are: Much 
more compressed, sculptured throughout, and lateral teeth widely 
diverging and curved downwards. ‘The umbonal ridge is very low 
nad broad, and fluted with elongated, divergent, flattened elevations. 
Nacre usually pink. 
Habitat: Clinch River, Lee Co., Va. Typein National Museum. 
Remarks: A large number of these shells was received several 
years ago from Mr. J. F. Sword, of Jonesville, Va., and sent out 
under Mr. Say’s name.. Recently several young ones were found 
which convinced me of their varietal value, indicating a connecting 
link with U. tuberculatus Barnes. 
ISAAC LEA DEPARTMENT. 
[Conducted in the interest of the Isaac Lea Conchological Chapter of the Agassiz 
Association by its General Secretary, Dr, W. S. Strode]. 
INTERGLACIAL SHELLS AT TORONTO, CANADA. 
[Extract from the report of James H. Lemon. Fromthe Transactions of the Isaac 
Lea Conchological Chapter for 1897. | 
The most interesting deposit from a conchological standpoint is 
found at Taylor’s Quarry on the banks of the Don River, a mile 
northeast of the city of Toronto. At this point a good section of 
the Drift has been exposed. The underlying rocks are Hudson 
River shales belonging to the Silurian period, rising about 30 feet 
above the bed of the river. They are immediately covered by a 
layer of till three feet thick, and which fills in all irregularities of 
the underlying shale. The fos-ils are found in a few inches of clay 
