48 THE NAUTILUS. 



Nassa beata by six specimens. 

 Nassa optata by one specimen. 

 ^assa spurca by four specimens. 

 Columbella minuscula by three specimens. 

 Columbella zonata by two specimens. 



GENERAL NOTES. 



Errata. Yor " Helix surge nti" in tlie May Nautilus, p. 8, 

 read " H. Sargextiana J. & P." ; the former name having been 

 used for a species from the Bahamas, belonging to the section 

 Plagioptycha. 



Those familiar with the life work of the late Dr. Joseph Leidy 

 will be interested to know that the two microscopes which he used 

 for years and from which he obtained such valuable results have 

 been placed in the hands of Messrs. Williams, Brown and Earle, 

 Philadelphia, to sell, by Mrs. Joseph Leidy, and they will be pleased 

 to show them to anyone desiring to see them. They were brought 

 in 1875 and were in almost constant use down to the date of his 

 death, and they show how careful a student he was, in that they 

 are in perfect order and very little soiled or scratched. 



The following extract from a letter to the Editor from Dr. W. H. 

 Dall, written upon his recent return from the AVest Coast, will be of 

 interest to our readers, '-i^ '-i^ ^ "■ My work this time was chiefly 

 stratigraphical. I was able to determine the position of the Wallala 

 beds as continuously conformable Avith, and below the upper 

 Cretaceous Chico beds. Also to discover that earlier collectors have 

 been mixing the genuine Pliocene and Postpliocene faunas in their 

 collections, the two being often conformable, closely adjacent, and 

 in similar mostly unconsolidated beds. 



In mollusks I found that the Periploma discus and Trophon tri- 

 angulatus have been found near San Pedro on several occasions 

 lately. At Monterey I got several specimens of Pedicularia cali- 

 fornica Newcomb, which lives on a red Gorgonian. IMonterey as a 

 collecting ground is already greatly injured, and will probably be 

 nearly ruined before long, on account of the Hotel del Monte, the 

 new town of Pacific Grove and the increased population of old 

 IMonterey, all the sewage of which is turned into the bay in front of 

 the town. Beaches which formerly would afford several hundred 

 species are now nearly bare, or offensive with stinking black mud. 

 Old collectors will learn this with regret. The San Pedro collectors 

 are very active and enthusiastic and doing good work." 



