78 The Williams Collection of Shells 



Una linterae, from Africa; Carelia cumingiana from 

 Hawaii, etc., etc. 



Particular mention should be made of the series of 

 West Coast shells from Mr. Henry Hemphill, illustrating 

 229 variations in the insular pulmonate fauna of that 

 region, and a similar series of 157 mutations of Patula 

 alternata. A set of thirty-three color varieties of the 

 brilliant little "banana snail," Polymita picta, from 

 Cuba, is very attractive also. There is an almost un- 

 exampled suite of the interesting genus Amphidromus, 

 65 species in all, and equally fine showings of Achati- 

 nella, Clausilia, and Eulota. 



Although this is primarily a shell collection, there is 

 a good series of the shell-less "slugs" of Limacidae, 

 Onchidiidae, etc. 



3. AMPHINEURA. Scarce of individuals and al- 

 most unknown to the rank and file, difficult of study, 

 the Chitons, or "Coat-of -Mail shells," have always found 

 a few admirers among advanced conchologists. The 

 suite of these forms selected to illustrate the various 

 modifications of these multivalve creatures is well 

 chosen, and covers the four great families : Ischnochi- 



TONIDAE, MOPALIIDAE, AcANTHOCHITIDAE, and ChI- 



tonidae. Among specimens of special note are Oni- 

 thochiton hirasei, Acanthochites subachates, Cryptoplax 

 japonicus and C. rhodoplax, all newly described by 

 Pilsbry, from Japan, together with two new and rare 

 forms from St. Vincent's Gulf, Australia, viz.: Chiton 



