Occasional Papers of the Museum of Zoology 35 



the river flats, a short distance below Brown Lake. Probably 

 came from the deep waters of the lake (i), as that was appar- 

 ently the nearest locality in which it could live. Measured: 

 alt. 43.8 mm. ; g. diam. 25.4 mm. 



Lymncea kirtlandiana Lea. Habitats: 12, 17. This and the 

 following form appear to replace Lymncua palu^tris as the 

 typical Lymnaea of the temporary swamps of this region. The 

 majority of the specimens of this form were collected from 

 the sedges, on which they were aestivating, often two or three 

 feet above the stagnant water which was still in the pools, in 

 such large numbers that they were most easily collected with 

 an ordinary beating cloth such as used by insect collectors. 

 They were fastened to these sedges by dried mucus, so that 

 the aperture was entirely closed. 



These shells were striped with light yellow along the growth 

 lines, as is so often the case with Lymncea paliistris var. zebra 

 Taylor. All of the striped specimens of either species taken 

 by me have been from these temporary swamps. It seems 

 probable that the stripes are simply the effect of dessication 

 during aestivating periods. 



Shells light straw-color, darker toward tip ; first whorl dark 

 indigo. Striated spirally so as to give the shell a satin-like 

 finish, although not so delicate as in the variety. Aperture 

 with a heavy, purplish-white callus, bordered on the inside by 

 a broad, chocolate-colored band. Measurements follow : 

 Table VII. Lymruea kirtlandiana 



Sedge Swamp (12) 

 Beaver Meadow (17) 



Brook Flats (18) 



