84 THE NAUTILUS. 



institution. The name and address of each donor with date of 

 reception, are neatly written on the cards, upon which the shells 

 are mounted and the officers of the Association give the collection 

 their personal supervision. 



Changes of address of members should be promptly noted to the 

 Secretary. 



NOTES AND NOTICES. 



Mr. F. H. Lattin, whose Natural History establishment at Albion, 

 N. Y., has long been well known to many of us, has recently 

 founded a " branch " in Chicago, where we lately had the pleasure 

 of looking through his large mass of material. Mr. Lattin has now 

 a considerable stock of shells in addition to his departments of orni- 

 thology and oology, and it is with pleasure that we announce this 

 first commercial enterprise in the Conchological line in the West. 

 F. H. Lattin & Co. now occupy a handsome and well filled build- 

 ing at 3571 Cottage Grove Avenue. 



A VIGOROUS EDITORIAL from the pen of Mr. J. Ritchie, Jr., deal- 

 ing with the recent postal ruling against natural history specimens, 

 appeared in the Commomvealth (Boston), Saturday, September 23. 



Variations of Strobilops hubbaedi. — In looking over our 

 collection of this species I find that over half of them have three 

 teeth, but about a third have four, and I found one with five. We 

 have collected them from several diflerent localities, but all in Flor- 

 ida, and nearly all in this county, some near the coast and some 16 

 to 18 miles inland. — G. W. Webster, Lake Helen, Florida. 



A synonym of Leftothyra. — It seems to have escaped notice 

 hitherto that Gabb's genus Petropoma (Journ. Acad. Nat. Sci., 

 Phila. viii, p. 281) is founded upon a species exhibiting all the 

 essential features of Leptothyra . The operculum and shell are very 

 like in structure to the granulose species of the central Pacific. 

 Gabb, in his description, mistakes the inside for the outside of the 

 operculum. Being later in date than Leptothyra, the name Petro- 

 poma becomes a synonym. — H. A. P. 



