134 PROCEEDINGS OF THE ACADEMY OF [Feb.. 



Pine Canyon, 7,500 feet; Rustler Park; Long Park, 8,000 feet; "Box" 

 in Rucker Canyon. 



This species is new to the Chiricahuas. It was originally described 

 from the Huachuca range. It was found in some profusion in Long 

 Park, many specimens exceeding the type in size, the largest 2.3 mm. 

 in diameter. 



It is somewhat remarkable that this form, belonging to a southern 

 genus and here at the northern edge of its known range, should be 

 found only at high levels. 



Punctum californicum Pils. 



P. californicum Pils.. Nautilus, XI, April, 1898, p. 134 (Fish Camp, Fresno 

 County, California). 



Head of Cave Creek, Station 14, 8,000 feet; Rustler Park; Long 

 Park. Found with Radiodiscus. 



Fig. 28. — Punctum californicum Pils., Rustler Park, Chiricahuas. 



Only seven examples of this atom of life were found, none of them 

 as large as the California types, and probably not fully mature. The 

 figured example measures alt. .82, diam. 1.35, width of umbilicus .35 

 mm., whorls 3^. The first 1| whorls are smooth; then very fine 

 obliquely radial stria? appear. On the last whorl the striation is dense 

 and fine, with thin delicate cuticular laminae on the stria?, which give 

 fresh shells a satin sheen where the light strikes, the color of the shell 

 being light chestnut. Stria? at nearly regular intervals are slightly 

 more prominent. At the periphery there are about 40 of the more 

 prominent stria? in 1 mm. The umbilicus is one-fourth the total 

 diameter. 



An adult shell of the type lot of P. californicum measures 1.8 mm. 

 diam., umbilicus .42 mm., therefore, slightly less than one-fourth the 

 diameter. The sculpture is similar to that of Chiricahua P. cali- 

 fornicum. 



This snail is new to Arizona, having been known hitherto only from 



