NEW FORMS OF AMERICAN MOLLUSCA. 
BY T. D. A. COCKERELL. 
PUPA ARIZONENSIS var. nov. SAXICOLA. 3 to 334 mm. long. 
Common under rocks on Round Mountain, Custer County, Colorado. 
Dr. V. Sterki, to whom I sent specimens, remarks, “ They are a 
little smaller than my specimens from New Mexico, and, if I am not 
mistaken, a trifle more tapering towards the apex than the type 
specimen in the Binney and Bland collection.” 
Pupa OVATA forma nov. ANTIQUORUM, 2mm. long; lamellz 7; 
three on parietal wall, the central one large and slender, the others 
very small: two on columella, these approximately of equal size, 
and both rather slender: two on external wall, continued backwards, 
the upper one large and curved downwards about its middle. Whorls — 
4%, body whorl inflated, the others diminishing regularly and rather 
rapidly towards the apex; outer lip conspicuously curved inwards 
opposite the upper tooth on external wall. Post-tertiary deposit at 
West Cliff, Colorado. This form also occurs living, as Dr. Sterki, to 
whom I sent a specimen, says it “is of a form of which I have seen 
examples from many parts of the country, of the same size, shape, 
and formation of lamellz.” 
BULIMULUS DORMANI forma noy. SUBFASCIATUS. 31 mm. long, 
very thin, semitransparent, hardly at all maculate, but fasciate with 
pale brown about base on body whorl, 7. e., an indistinct band at 
periphery, a broad one below, and the umbilical region brownish. 
This form was sent to me by Mr. W. G. Binney. 
3 Fairfax Road: Bedford Park: London, W.: Eng.: Feb. 28, 1891. 
CACTACEA OF THE CAPE REGION OF BAJA CALI- 
FORNIA. 
BY T. S. BRANDEGEE. 
Cactaceze, although numerous in the Cape Region, are not as 
abundant in species or individuals as in elevated regions of the cen- 
tral peninsula about Purisima and Comondu, but they are com- 
-mon enough to form a prominent portion of the vegetation. 
A Mamillaria just coming into flower was found from near the 
ocean at San José del Cabo to the summit of the mountains of the 
Sierra de la Laguna. It isa nearly globular species, six to eight 
inches in diameter. 
