THE NAUTILUS. Ill 



EXCHANGES Continued. 



SLUGS WANTED. We desire to obtain specimens of Prophysaon 

 from any locality. Also Ariolimax (Hesperarion) niger and Hemp- 

 hilli. The latter, described from Niles Station, Alameda Co., Cal., 

 we have not yet seen. Also, and especially, Anadenus (Anadenu- 

 lus) Cockerelli Hemphill, described from Cuyamaca Mts., San Diego 

 Co., Cal. It is important that these forms be made known anatom- 

 ically, and anyone who can supply any of them, or in fact any slugs, 

 will receive due credit therefor in our publication, and, on applica- 

 tion, we will send the first paper of our " Revision of N. A. Slugs." 

 Slugs should be drowned in water and then preserved in alcohol 

 diluted by about one-third its volume of water, or in a 3% solution 

 of formalin. Alcohol is preferred, especially for small slugs. H. 

 A. Pilsbry, Academy Natural Sciences, Logan Square, Philadelphia, 

 Pa. 



Bargains in Land and Marine Shells. 



Rare and Choice Specimens offered at the lowest prices. Satis- 

 faction guaranteed or money refunded. Every specimen correctly 

 classified. Send list of desiderata. 



JAMES A. HARKINS, Atlantic City, N. J. 



Shells, Marine Curios, &c. ^?'t t 



low prices and should you wish anything from this section, let me hear 

 from you. All inquiries will have a prompt reply. 



J. H. HOLMES, DUNEDIN, FLA. 



R. FRIEDLANDER & SOHN, 



CARLSTRASSE: 11, 



BERLIN, N. W., GERMANY. 



Reduced in price from $16.00 to $10.00, postage included. 

 Dr. C. A. WESTERLUND'S 



Fauna der in der palrearktischen Region lebenden Binnen-Con- 

 chylien. 



(The Pala?arctic fresh water and terrestrial Mollusk Fauna.) 



2 volumes (in 7 parts), with 2 supplements, 1886-90, 2,061 pages 



in Royal Octavo. 



The chief modern work on Conchology. 



Please apply for our CONCHOLOGICAL CATALOGUE (106 pages with 

 3,925 titles), which will be sent free. 



