102 THE NAUTILUS. 



three species of Sonorellas in large slides. As a rule it is one 

 species at a time in the south-west, and it is a surprise, great 

 luck, if more than one genus of those noted above turn up in 

 any one colony. With the little fellows it is different. They 

 have some peculiarities, but as a rule go it as they please, hit or 

 miss. 



In the limestone foothills, while mining, Teodoro had seen 

 shells. We went to the exact spots, both at Chloride and Her- 

 mosa, but no traces of shells were there. The fumes of the 

 smelters, blasting, chickens, loss of timber, disease, starvation 

 or something, had removed them from that vicinity. In a hill 

 on the Little Palomas I found two bones of Oreohelix, but two 

 hours of hard digging did not find any more signs. Of Holo- 

 spiras there were plenty. 



At Chloride the proprietor of the Oliver mines told us he had 

 seen fossil shells deep in the dirt at his camp. Here seemed to 

 be a good place to get at least well-preserved bones, and after 

 our return from a side trip to the Cuchillo range, Monticello, 

 Animosa Canada and the San Mateo range, we visited Mr. 

 Oliver's camp. This happy spot is located on Mineral Creek, 

 five miles above Chloride, in a narrow belt of limestone. Under 

 the limestone spawls and fallen timber live shells were abundant. 

 We ate our lunch at a maiden-hair spring, picking shells and 

 water cress during the process. The fern (Adiantum capillus- 

 veneris) had pinnae an inch wide, a form that has been wrong- 

 fully catalogued from the Grand Canyon of Arizona as A. tenerum, 

 the Florida species. A branch of the stream southward, with 

 hard limestone and a dry hillside, had no shells. The belt 

 northward was not examined. 



I returned to Deming via Hermosa, Las Animas Canyon, 

 Hillsboro, and Kingston. The story of the findings will be told 

 jointly in another article, but I desired to name this ribbed, 

 gaudy and hard-to-find species of Chloride all by myself, in 

 honor of one who has encouraged me so much to spend more 

 than thirty of my vacations in bear, cow and catamount coun- 

 tries : — 



Oreohelix pilsbryi, n. sp. — With numerous spiral beaded 

 cords, this belongs to the haydeni school of sculpturing. In 



