120 TIIK NAUTILUS. 



the common, or typical, form ; and it probably will l)e 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 Xatural Sciences of 

 Philadelphia sailed from New York on the Ifitli of February, for 

 Yucatan and Southern Mexico. Extensive collections, of plants, 

 moUusks, birds, insects, etc., will be made, and volcanic 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 

 Nautilus to Dr. W. D. Hartman, of West Chester, Pa., author of 

 the excellent little book, " C.)nchologia Cestrica," — now becoming 

 scarce — and of numerous papers on Partula and Achatinella. Some 

 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, sur])assing, probably, any other collection of these two 

 genera. In Hdicina, Melaiua and South Sea Helices it is also very 

 rich. 



Prof. H. A. Ward, 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. 



^^^\NTEI). — Correspondents interested in Corbiculidae. Also 

 Helices of C^'uinberland subregion. Offered: Limnaea Adelinae, 

 Glyptostoma Newberryanum, Lucapina crenulata, Monoceros pancilira- 

 tinn, etc. Edward W. Roper, Revere, Mass. 



Errata. — In the January Nautilus 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, 20tli line from top, for " West " read " Wet." 

 A blunder also occurs in the name of >Mr. M. Burton Williamson, 

 Universitv P. O., Cal. 



