GO 



THE NAUTILUS. 



Mangilia atrostyla Dall. 

 Mangilia stellata Stearns. 

 Marginella catenata Montagu. 

 Anachis avara Say (var.). 

 Anacliis pulchella Kiener. 

 Olivella mutica Say. 

 Olivella floralia Duclos. 

 Crepidula convexa Say (young). 



Truncatella caribbeensis Sby. 

 Sayella crosseana Dall. 

 Odostomia sp. 

 Augulus tampaensis Conr. 

 Pleuromeris tridentata Say. 

 Codakia orbiculata Mtg. 

 Chione grus Holmes. 

 Transenella stimpsoni Dall. 



CORRESPONDENCE FROM ARIZONA. 



Late in May Mr. Ferriss went into camp in Sabino canyon in the 

 southern Catalinas, about 20 miles from Tucson. The following 

 extracts give an idea of the conditions of molluscan life in that 

 vicinity. 



" The climate here is dryer than formerly, or else \ve have much 

 to find out touching the Sonorellas. This situation will compare 

 favorably with Nine-mile Waterhole in the Chiricahuas, and the 

 Sierra Colorado, as to crumbling granite and quartzite, dryness and 

 heat. I go forth for dead shells, and if any are found alive it is so 

 much velvet. The proportion of dead in fair condition to alive is 

 about 100 to 1, and you have nearly all the live ones. That is, I 

 find about one alive on each day's trip. In some cases one species 

 apparently died out years ago and another came in later; thus I have 

 some very old shells. 



" Another thing that makes me feel that the climate has changed is 

 that there are remains of an Indian city at the mouth of the canyon, 

 extending up to the Rincons, ten miles, and about four in width. 

 When the water failed they probably moved. There are similar 

 village foundations on the other side of the mountain and on the 

 east side of the Dragoons. 



" There is more bird, fish and mammal life here than in any 

 mountain we have visited, and much of it is interesting, and again 

 I am sorry you are not here. The snakes and lizards are fine. I 

 have a good turtle shell the Acadamy can have if of value. There 

 is also a little '' stink pot " in the stream. 



" The prairie dog here is a mere puppy, a pigmy. The chipmunks 

 and squirrels are different. The birds are gorgeous. * * * 



" JAS. N. FERRISS." 



