96 THE NAUTILUS. 



and peculiar Cyprceas and Conus among the number. Trichotropis 

 and Scalaria are also well represented. 



New Mollusks of St, Heleka. Mr. E. A. Smith of the British 

 Museum has lately described the land shells of the island St. 

 Helena^ enumerating 27 species, of which 11 are new, and illustrat- 

 ing them with excellent figures. The prominent characters of the 

 fauna are a group of thin Bxdimuli, the very variable and curious 

 B. aurisvulpina, which has been known for over a century, and a 

 group of Patula-Vike shells very similar to the Pacific group Endo- 

 donta. Besides these, a novel form is described under the name 

 Tomigerus (f) j:>erexilis. We can scarcely believe that this belongs 

 to the South American section Tomigerus. It seems to be a distinct 

 genus of Pup id cB comparable to Boysidia and Hypselostoma, but dis- 

 tinct from either ; and deserving of a separate generic name. We 

 therefore propose to call it Campol^mus. The following characters 

 may be assigned to the group : T. dextrorsa vel sinistrorsa, parva, 

 anfr, ult. valde ascendens, pone labrum constrictus et scrobiculatus ; 

 apertura ovata, superne sinu circulari instructa. 



EXCHANGES. 



Wanted. Works on Land Shells, and rare North American 

 and Foreign Helices. Offered, Mesodon dentlferus, Sayii, Acan- 

 tliinula harpa, etc. — A. W. Hanham, Bank of British North Amer- 

 ica, Quebec, Canada. 



Wanted, by purchase or exchange, — good specimens of Anodonta 

 Ferussaciana Lea, size immaterial provided beaks are perfect. — 

 Bryant Walker, 18 Moffat Bid, Detroit, Mich. 



To exchange in large or small quantities. Anodonta suhorhi- 

 culata Say and Anodonta corpulenta Cooper, also about 40 species of 

 the fine Spoon river Uniones and univalves. — Dr. W. S. Strode, 

 Lewistown, III. 



Exchange. Unios heterodon Lea, lanceolatus Lea, Tappanianus 

 Lea, Anodonta WiUiamsii Lea and Marg. undulata Say (pink var.) 

 for other Unios not in collection. — W. T. Farrer, Orange, Va. 



1 P. Z. S. Lond. 1893, p. 258. 



