LYMN-EZID OF NORTH AMERICA. 395 
RECORDS. 
Micuican: Fish Point, Saginaw Bay, Tuscola Co. (Davis; Walker). 
GEOLOGICAL DistripuTIoN: Unknown. 
Eco.tocy: Not recorded. 
Remarks: Of this species Mr. Walker says: “This species is 
well characterized by its large, ovate body whorl and its very acute 
spire; the apical whorls are flattened and the straight line of spire is 
prolonged over the upper part of the body, giving a ‘pot-bellied’ ap- 
pearance to the shell.” 
This is a peculiar little species, unlike any other. Its very acute 
spire, large body whorl and elongate-ovate aperture appear to be the 
chief features, which easily distinguish it from catascopium, its near- 
est relative. “Named in honor of Prof. Charles A. Davis, of Ann 
Arbor, its discoverer, in recognition of the many valuable contribu- 
tions he has made to our knowledge of the distribution of the Mollusca 
in Michigan.” (Walker). 
Galba pseudopinguis Baker. Plate XLI, figures 6-7; plate 
XLII, figures 9-13. 
Lymnea pseudopinguis BAKER, Nautilus, XXI, p. 54, Sept., 1907. 
SHELL: Elongate-ovate to subglobose, rather thin; periostracum 
very light corneous, inclining to yellowish or brownish; surface dull to 
shining, but not polished ; growth lines very heavy and spiral lines deeply 
incised ; whorls five to six, rounded, the body whorl globosely inflated ; 
the whorls increase very rapidly in diameter; spire about as long as 
the aperture, broadly conic, the whorls very rapidly increasing in 
size; sutures well marked or deeply indented, bordered below by a 
wide, yellowish band; aperture ovate or roundly ovate, sometimes a 
trifle expanded and somewhat effuse anteriorly ; inner lip rather broad- 
ly expanded, triangular, reflected over but not closing the umbilicus 
which is a conspicuous chink; the inner lip is much compressed and 
dented at its junction with the body whorl, forming a slight plait; 
the parietal callus is very thin or wholly lacking. The axis is but 
slightly twisted. 
Length. Breadth. Aperturelength. Breadth. 
9.00 6.50 6.00 3.50 mill. Crystal Brook. 
9.50 6.75 6.50 S200) = 2 4 
8.25 5.50 5.40 3.00 
14.00 8.00 8.00 4.30 
12.50 7.50 7.30 4.00 “ 
11.00 7.00 7.00 Bake: a 
18.00 9.25 9.50 4.00 “ Canarsie. 
12.00 6.00 6.50 S00t oes ss 
7.25 5.00 5.00 3.007 5 Mt. Sinai. 
7.50 5.0C 5.00 2.50 ~ 4 
