LYMNEIDA OF NORTH AMERICA. oo 
not rapidly increasing in diameter, the body whorl very long and much 
compressed ; sutures well marked; spire acutely pyramidal, generally 
a trifle longer than the aperture; nuclear whorls like palustris in out- 
line and number, very dark chestnut colored; aperture elongated, 
slightly oblique, rounded below and somewhat acutely angled above, 
where the outer lip is slightly arched, as it joins the body whorl; outer 
I:p with a conspicuous varix, bordered by a dark chestnut band ; inner 
lip very narrow, forming a sharp keel on the columella and a thick de- 
posit of callus on the parietal wall; there is no evidence of an umbilical 
chink; the columella is marked by a distinct plait. 
Length. Breadth. Aperturelength. Breadth. 
15.50 5.50 7.10 2.25 mill. Cotype. 
20.00 6.00 ent Pe ee GOULCs 
24.00 8.00 11.00 4.50 “ Emmet Co., Mich. 
17.00 7.50 9.00 30 mine ne * 
27.50 9.25 10.50 5.00 “ Tomahawk Lake, Wis. 
22.00 7.60 10.00 4.25 ““ 5 ee - 
Type: New York State Museum, Albany, N. Y., three specimens ; 
No. A, 3030, cotype, Smithsonian Institution one specimen, No. 9026. 
Type Locarity: “Pic Lake,” North Shore of Lake Superior. 
ANIMAL: Not differing from palustris. Two colors were observed, 
one yellow and the other black. 
Jaw: As in reflexa. 
RADULA: Formula: poo tig + $444 34 535475 (30-1-30) ; 
The teeth are similar in form to those of refiexa. 
GENITALIA: Similar in form and proportions to those of reflexa. 
RANGE: (Figure 41). North shore of Lake Superior and eastern 
Ontario (75°) south to northern Ohio, west to Wisconsin. 
The records show this species to be an inhabitant of the humid 
division (Alleghanian) of the Upper Austral life zone from whence 
it extends south into the northern part of the Lower Austral (Caro- 
linian) life zone and north well into the Boreal (Canadian) life zone. 
It is characteristic of the Great Lake drainage and of the Canadian 
and Upper Mississippian regions. 
RECORDS. 
UNITED STATEs. 
MicuicAn: Marquette, Marquette Co. (Downing); Lake Gogebic, On- 
tonagon Co. (Ruthven); Carp Lake, Emmet Co.; Bell Isle, Detroit River, 
Wayne Co.; High Island Harbor, Charlevoix Co.; Charlevoix, Chippewa; Emmet, 
Houghton, Marquette, Monroe, Ontonagon, Wayne and Wexford Counties 
(Walker). 
Oxu10: Hudson, Summit Co. (Walker). 
Wisconsin: Tomahawk Lake, Oneida Co. (Baker). 
