140 THE NAUTILUS. 



I am inclined to believe that the snails of Marco were nearly 

 all killed by some unusually cold spells, but that a very few 

 not found by us in our early visits here have been increasing in 

 numbers in the trees of the thicket in question since then.- 

 CLARENCE B. MOORE. 



Capt. W. D. Collier, the leading citizen of Marco for a great 

 number of years, informs me that there were no Liguus snails 

 at Key Marco in his early days, but that forty-eight years ago 

 he brought tree snails from Middle Cape (Cape Sable) and 

 "planted" them at Caximbas, Goodland Point and Marco, all 

 on Key Marco. He had been that winter with Prof. Velie of 

 Chicago collecting Liguus on the lower coast and on the Keys 

 along Hawk Channel to Key West. They searched all those 

 Keys but he never saw or heard of Liguus showing any blue 

 coloring. He states that Liguus, after the planting at Marco, 

 developed and spread until they became numerous, but he 

 thinks they subsequently were almost killed out by severe cold . 

 M. G. MILLER. 



NOTE ON A VARIETY OF LIGUUS. In my paper on the vari- 

 ations and distribution of Liguus in Florida I figured a form 

 from Lignumvitse Key (pi. 37, figs. 4c, 4d) which I took to be 

 a form of var. lignumvitae, having only three specimens. Mr. 

 Simpson has recently named this form Liguus solidus lineatus 

 (In Florida Wilds, Frontispiece, fig. 3). He states that among 

 more than a thousand specimens examined he always found it 

 distinct. It appears that the name lineatus is preoccupied by 

 Achatina lineata Valenc., 1833, which was based upon another 

 variety of the old Liguus fasciatus. To avoid having two varie- 

 ties with the same name in the same species or closely related 

 species, I would propose for the shell figured on my pi. 37, 

 fig. 4c the varietal name LIGUUS FASCIATUS SIMPSONI, the type 

 being no. 128063 A. N. S. P. H. A. PILSBRY. 



SHELLS OF ZION NATIONAL PARK, UTAH. Fossil specimens of 

 Polita indentata Say, Gonyodiscus cronkhitei Nc., and Succinea 

 avara Say, imbedded in several pieces of limestone from Zion 



