116 



A. SPECIES NOT PREVIOUSLY REPORTED. 



LAMELLIBRANCHIATA. 



Family UNIONIDJE. 



Genus UNIO. 



Unio asperrimns, Lea. Verdigris River at Coffeyville (Snow);* Mill 

 Creek, Wabaunsee Co., and Soldier Creek, Shawnee Co. (Quintard). 



This form and U. lachrymosus. Lea, are probably synonymous. A 

 closely related form is U. fragosus, Con., also of nearly the same geo- 

 graphic distribution. The largest and finest specimens the reporter has 

 ever seen are those from near Wichita, collected by Mr. J. R. Mead, and 

 reported under the name of U. lachrymosm, which see. 



riiio pienus, Lea. Verdigris River ( Snow). 



i uio pitstnlatus, Lea. Verdigris River at Coffeyville (Snow). 



This form is a member of the pustulosus group, and was described from 

 the Ohio River in the vicinity of Cincinnati. It is readily distinguished 

 from its near relative in the group as well as by name, U. pustulosns, 

 Lea, by its much less numerous but larger pustules, arranged in two di- 

 verging series from umbones to margin. In this respect it differs materi- 

 ally from pustulosus, which has smaller pustules generally distributed over 

 the whole disk but most numerous on the posterior half. In the details 

 of the hinge-teeth and adductor cicatrices they also present differences. 

 Pustulatus ranges from New York to Kansas, but is nowhere abundant, 

 though formerly common in the vicinity of Cincinnati. 



Genus ANODONTA. 



Anodonta edentulata, Lea. Soldier Creek. Shawnee Co. (Quintard ). 

 See under A. arkansensis, p. 1^J2. 



Anodonta imbecillis, Say. Verdigris River at Coffeyville (Snow); 

 Little Arkansas River at Wichita (Mead). 



Ic is not difficult to distinguish this Anodonta from all others of the 

 genus by its brilliant green epidermis, the small but beautifully undulate 

 umbones, and its exceedingly fragile shell. In geographical distribution it 

 rivals the range of all other forms, extending from Canada to Kansas ; to 

 Texas; to Georgia; to New England. 



CORBICULID^E. 

 Genus SPHyERiUM. 

 Spheerinm partmneium, Say. Cedar Creek, Mt. Ida (Snow); brook 



*The courtesy of Prof. F. H. Snow, of the Kansas State University, has al- 

 lowed the use of the collections contained in that institution. These are credited 

 above under his name. They were all collected by Mr. E. P. West, and have been 

 of great use in helping to understand the nature of the shell life of southeastern 

 Kansas To Mr. J. B. Quintard and to Mr. J. R. Mead, the Survey is also in- 

 debted for numerous examples of some very fine Uiiionidse, all of which are cred- 

 ited above. Others who contributed largely to the material embraced in preceding 

 contributions were prevented from doing much work in this department during 

 the past summer by the unusually high water that has prevailed in the rivers of 

 southern Kansas. R. E. C. 



