THK NAUTILUS. Ill 



EXCHANGES Continued. 



SLUGS WANTED. We desire to obtain specimens of J'rophytaon 

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

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

 we have not yet seen. Also, and especially, Binneya notabilis 

 Cooper. 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 slug*. H. 

 A. Pilxbry, 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. 



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- 

 chylieu. 



(The Palfearctic 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 Cotichology. 



Please apply for our CONCHOLOGICAL CATALOGUE (106 pages with 

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



