LYMNJEIDJE OF NORTH AMERICA. 465 



Lymnaea Sp. 



Limnaa sp. WALKER, An. Rep. Mich. Geol. Surv., 1908, p. 291, 1909. 



Isle Royale : III, 3, Bulrush Zone at western end of Rock Harbor, 

 No. 163; IV, 2, Island No. 14 in Tobin Harbor, No. 126. 



At both of these localities occurred a few dead, fragmentary and 

 more or less decayed specimens, which could hardly be referred to any 

 of the species listed above, and yet were too imperfect to successfully 

 identify. (Walker). 



Lymnaea pyramidata Sowb. 



Limnaa pyramidata SOWB., Conch. Icon., sp. 58, pi. 6, fig. 35, 1872. 



No locality is mentioned for this species. The figure resembles 

 Galba elodes jolictensis. Mr. E. A. Smith has expressed to Mr. Walk- 

 er his belief that it is a monstrosity of reflexa. 



Limnaea terrae-novae Lesson. 



Limnaa terrcenovcs LESSON, Rev. Zool., p. 356, 1840. BINNEY, Journ. de 

 Conch., XV, p. 428, 1867. 



As remarked by Binney, the affinites of this species are very doubt- 

 ful. 



Limnaea praecellens West. 



Limncea pracellens WEST., Ann. Mus. St. Petersburg, p. 177, 1898. 



No information has been obtained concerning this species. 



Galba. Species indet. Plate XXX, figures 21-24. 

 SHELL : Small, ovate, turreted ; periostracum yellowish horn color ; 

 surface shining; growth lines conspicuous, crowded; spiral lines ab- 

 sent; whorls 5, rapidly enlarging, the body whorl quite globose; spire 

 short, broadly turreted, the whorls inclining to be shouldered ; aperture 

 ovate or roundly ovate, somewhat oblique, about as long as the spire; 

 outer lip thin; inner lip evenly rounded, erect; umbilical chink widely 

 open; there is no plait on the columella. 



Length. Breadth. Aperture length. Breadth. 

 6.00 3.25 3.00 2.00 mill. 



6.00 3.25 3.00 1.75 " 



6.00 3.25 2.75 1.75 " 



TYPES: Chicago Academy of Sciences, four specimens, No. 24,- 

 545. 



TYPE LOCALITY : Greenhouse, Boulder, Colorado. 



ANIMAL: "Greenish-gray, foot very pale; dorsum darkened and 

 distinctly orange in the middle line; eyes black, large; tentacles short, 

 triangular." (Cockerell). 



REMARKS: This peculiar little Lymnsea was found in a green- 

 house in Boulder, Colorado, by Dr. T. D. A. Cockerell. It is unlike 



