22 THE NAUTILUS. 
Light chestnut colored, rather opaque. Contour about that of P. 
conspectum, the spire very low-conic, apex obtuse. Whorls 33 to 4, 
convex, separated by impressed sutures, the last more or less descend- 
ing in front. Umbilicus open, easily showing all the whorls, its 
width contained 3% to 3} in diameter of shell. Surface with close. 
fine, irregular growth-striz, sometimes showing slight traces of wide- 
spaced stronger strive, and very densely, minutely spirally striated- 
Aperture rounded-oval, quite oblique, the lip thin; columellar mar- 
gin brought far forward and expanded. Alt. 1°15, diam. 2 mm. 
Numerous specimens of this small species were found by Hon. 
Delos Arnold crawling upon a cement walk in front of his residence 
in Pasadena, California, and were communicated to the writer by 
Mrs. Julia E. Campbell. 
In typical P. conspectum the umbilicus is smaller, contained 43 to 
4% times in diameter of base, and the riblets are prominent, although 
subject to considerable variation. The dentition of the Pasadena 
shells is similar to that of conspectum. The other species of Pune- 
tum now known from America are P. pygmeum var. minutissimum 
Lea, and P. Randolphii Dall. 
GENERAL NOTES. 
Proposep BroLocicaL Sration.—Professor T. D. A. Cockerell, 
of Las Cruces, New Mexico, has it in view to found in New Mexico 
a Biological Station, and health and holiday resort for scientific per- 
sons, teachers and kindred spirits. 
Three years experience in this country gives the writer the high- . 
est opinion of the value of the climate for persons in the earlier 
stages of phthisis; while the abundance of new and interesting forms 
of life, especially among the insects, is remarkable. Many inter- 
esting general problems, such as those of the life-zones, can also be 
studied in New Mexico to great advantage. 
A beginning will be made this summer if students can be found. 
Prof. Cockerell will be glad to hear from any who are interested in 
the matter, and especially from those who might be inclined to work 
with him for longer or shorter periods during the present summer, 
Proressor H. E.Sarcenrt is now in Deteroit, Michigan (Detroit 
Museum of Art), engaged in preparing for public exhibition the 
Stearns collection of Mollusca. 
