44 THE NAUTILUS. 



(d.) \ ar. comjxicta CkW. J. of Conch., 1892, p. 39. Colorado. 



(e.) forma viajor W. G. Binney, Ac. Nat. Sci. Phila., Nov., 

 1858, sine descr. A large variety, about 13* mill, long, 

 in the Binney and Bland collection, is from Utica, N. 

 Y. It is marked var. major, apparently in Mr. Binney's 

 handwriting. 



(20.) S. aurea Lea. I formerly supposed this might be 

 closely allied to pfeifferi ; having received a close relative 

 or variety of that species from St. Thomas, Ontario, Can- 

 ada (D. B. Cockerell), which seemed to agree with aurea. 

 This view, however, was probably erroneous, as a speci- 

 men marked aurea in the Binney and Bland collection 

 seems to belong to the avara section. 



(21.) S. mooresiana Lea. I have found shells in a dry locality 

 on Round Mountain, Custer Co., Colo., which, although 

 no doubt referable to a variety of avara, appear to be 

 Lea's mooresiayia. A specimen of mooresiana in the 

 Binney and Bland collection, from the Platte River, also 

 seems to belong to S. avara. 



(22.) S. oregonensis Lea. Mr. Singley sent me this from Dal- 

 les, Oregon, (E. H. White). I noted that they were of 

 the avara group, but in shape approaching the pfeifferi 

 group, pale reddish-horn, striate, dull. One in the Bin- 

 ney and Bland collection looks like a member of the 

 pfeifferi group, but another, marked with a query, is 

 larger and seems to belong to the avara section. 



(23.) S. rusticana Gould. Mr. Singley sent me some shells 

 labelled oregonensis from Plumas Co., California (G. W. 

 Michael), of which I noted : avara group, larger than 

 oregonensis from The Dalles, greenish-horn, more shiny, 

 whorls more convex. These specimens seemed to agree 

 better with rusticana than oregonensis. Later, Mr. Bin- 

 ney has sent me a shell, apparently rusticana, found by 

 Mr. Hemphill at Julian City, San Diego Co., California. 

 This shell is 10| mill, long, form of rusticana, but aper- 

 ture more oblique, color reddish-horn, rather shiny ; soft 

 parts (in alcohol) black. It is impossible to tell whether 



