120 THE NAUTILUS. 
the common, or typical, form ; and it probably will be found elsewhere. 
It is so characteristic that I thought it not out of the way to name 
it var. gracilis. 
P. curvidens is found nearly everywhere east of the Rocky 
Mountains, but it seems to go not quite so far west and north as 
pentodon does. 
(To be continued.) 
GENERAL NOTES. 
A party of naturalists from the Academy of Natural Sciences of 
Philadelphia sailed from New York on the 16th of February, for 
Yucatan and Southern Mexico. Extensive collections of plants, 
mollusks, birds, insects, ete., will be made, and voleanic and other 
geological phenomena studied. Prof. Heilprin, Messrs. Stone, Ives, 
Baker and Leboutillier make up the personnel of the party. 
We are indebted for the illustrations in this number of the 
Naurrius to Dr. W. D. Harrman, of West Chester, Pa., author of 
the excellent little book, *‘ Conchologia Cestrica,’—now becoming 
and of numerous papers on Partula and Achatinella. Some 
scarce 
months ago we had the pleasure of going over the Doctor’s collec- 
tion of these beautiful shells. In completeness it is certainly one of 
the first rank, surpassing, probably, any other collection of these two 
genera. In Helicina, Melania and South Sea Helices it is also very 
rich. 
Prof. H. A. Warp, of Rochester, N. Y., spent a few hours with 
us recently. During the past year Prof. Ward has collected exten- 
sively on the West Coast of South America and visited the Exposi- 
tion at Paris. 
W anrep.—Correspondents interested in Corbiculidae. Also 
Helices of Cumberland subregion. Offered: Limnaea Adelinae, 
Glyptostoma Newberryanum, Lucapina crenulata, Monoceros pancilira- 
tum, ete. Epwarp W. Roper, Revere, Mass. 
Errata.—lIn the January Navuritus the following corrections 
should be made: 
p- 102, 10th line from top, for “ West” read “ Wet.” 
p. 102, 5th line from bottom, for “ Chester” read “ Custer.” 
p- 103, 20th line from top, for “ West” read “ Wet.” 
A blunder also occurs in the name of Mr. M. Burton Williamson, 
University P. O., Cal. 
