44 THE NAUTILUS. 
(d.) var. compacta Ckll. J. of Conch., 1892, p. 39. Colorado. 
(e.) forma major W.G. Binney, Ac. Nat. Sci. Phila. Nov., 
1858, sine deser. A large variety, about 133 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 mooresiana. *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 pfeiffert 
group, pale reddish-horn, striate, dull. One in the Bin- 
ney and Bland collection looks like a member of the 
pfeiffert 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 
