ACADEMY OF NATURAL SCIENCES. 261 



lines of growl h cut by smooth depressed waved grooves transversely, and thus 

 obliquely to the sutures (while those of H. Traskii are parallel). 



Diam. maj. 0.95 ; alt. 0.40 inch. 



A region so near San Francisco ought to furnish more and better specimens. 



There is a form referred to H. fidelis, from Humboldt Bay, which may also 

 prove a new species. It is entirely purplish black, without bands, the lips white 

 inside, and differs from infumata chiefly in great elevation and thicker lips, 

 having even the subcarinate body whorl of the latter, and the same number of 

 whorls (6 1 .,). There is, however, no trace of bristle marks, and some speci- 

 mens appear to connect it with fidelis, suggesting a possibility of its being a 

 hybrid. 



The State Collection contains one specimen, obtained from the late Dr. Frick. 



Diam. maj. 1.24 ; min. 1.09 ; alt. 0.70 inch. 



Regular Meeting, April 16th, 1866. 

 President in the chair. 



Five members present. 



Mr. Horace F. Cutter was elected a Resident Member. 



The Committee on rooms reported that two rooms had been hired 

 for the Academy on the southeast corner of Montgomery and Sac- 

 ramento streets. 



Regular Meeting, May 7th, 1866. 

 President in the chair. 



Eight members present. 



Mr. Harford presented some ivory nuts from Panama. 



Dr. Gibbons made some remarks explanatory of a series of 

 tables which he exhibited, showing the variations of rain fall at San 

 Francisco, and their relation to the phases of the moon. He 

 showed that the greatest amount of rain fell immediately before the 

 time of full moon, and that, following the day of the full, the dim- 

 inution in quantity was very rapid. The series of observations 

 from which the tables were prepared extended over a period of fif- 

 teen years. 



