THE NAUTILUS. 33 



L. reflexa sealaris. PI. I, fig. 7. 



Spire elongated, whorls rounded and suture deeply impressed. 

 This form, which occurs occasionally, associated with the type, in 

 the marshes at the mouth of the Rouge River, Wayne County, I 

 cited without sufficient consideration, in my catalogue of 1879 as 

 var. distortus Rossra. 



L. columella Say, Southern part of the state but not abundant. 



L. lanceata Gld. This may prove to be a form of L. reflexa. It 

 is cited in all the catalogues, but I believe wholly because the origi- 

 nal specimens came from the north shore of Lake Superior. Spec- 

 imens from Belle Isle, Detroit River, are said by Pilsbry to be close 

 to Gould's types in the Academy's collection. 



L. palustris MwVi. Found everywhere in great abundance and 

 variety. A striped form similar to L. reflexa zebra is sometimes 

 found. Limnophysa j'ragilis Linn., cited by De Camp, Avould seem 

 to belong here. Dr. De Camp informs me that the L. intertexta of 

 Currier, cited in his catalogue but never described, is a form of this 

 species. 



L. palustris michiganensis. PI. I, figs. 9 and 10. 



This form is similar to variety D, as figured by Haldeman in his 

 Monograph pi, 6, fig. 7, but is much smaller, the length being but 

 half an inch. It is very delicately striate and under the glass 

 shows many very fine spiral lines cutting the strise. The aperture 

 is just one-half the length of the shell. The lip is thickened by a 

 rib within the inner margin, which shows itself as a white band on 

 the outer surface. Spire acute, suture impressed, umbilicus small. 



Haldeman's figure above cited, if reduced nearly one-half, would 

 be an excellent representation of this variety; excei)t that the 

 whorls are more rounded and suture more deeply impressed than in 

 this form. Figure 9 is from Ecorse and figure 10 from Greenfield, 

 Wayne County. I am indebted for examples from Oregon to Mr. 

 Pilsbry, who informs me that it ranges west from Michigan to 

 Washington. 



L. binneyi Tryon. Cited by De Camp from Houghton Lake. 



L. haydeni Lea. Cited by De Camp from Houghton Lake. 



L. traskii Tryon. Cited by De Camp from Newaygo County. 



L. contrada Currier. Higgius Lake, Roscommon County is the 

 only locality known for this curious form. It is either a semi-fossil, 

 extinct species or an inhabitant of deep water, as only dead speci- 

 mens have ever been found as I have been informed. 



