496 PROCEEDINGS OF THE ACADEMY OF [1892. 



Rovirosa, a valuable collection of land and fresh-water shells from 

 the State of Tabasco, Mexico, including a number of new forms ; a 

 list of these, with descriptions and illustrations of the new species, 

 is published in the Proceedings of the Academy. 



The more valuable accessions from Australasia, have been the 

 series of New Zealand Chitons, received from Professor F. W. 

 Hutton, of Christchurch, N. Z. ; the New Zealand gasteropods, 

 lamellibranchs and brachiopods, received from Mr. G. W. Wright^ 

 of Auckland, N. Z, ; and a series of 34 selected species of Australian 

 gasteropods from Mr. Billinghurst, for which the same number of 

 American shells were sent in exchange. 



From Dr. O. F. v. Mollendorff, of Manila, Philippine Islands, 35 

 species of land shells, new to our collection, being with a few excep- 

 tions, his own new species. Also a series of 20 Oriental Helices in 

 alcohol, for dissection. 



In the museum the land shells have been remounted and system- 

 atically arranged, as far as they have been monographed in the last 

 completed volume of the Manual. The arrangement of the marine 

 gasteropoda is also practically completed as far as the Chitons, the 

 study of which has not been iinished. 



Four cases fitted with shallow trays in lieu of drawers, have been 

 supplied by the Curators of the Academy, aflfording space for the 

 systematic arrangement of the limpets and chitons. It is hoped that 

 equal facilities for the accommodation of the Bulimi will be pro- 

 vided during the coming year. 



The Conservator has received much assistance during the year 

 from Messrs Campbell, Johnson and Ford; these gentlemen having 

 re-arranged the cases containing fluviatile gasteropods, which have 

 been inconvenieutly over-crowded for several years past. The 

 entire work of determining, labelling and mounting the specimens 

 of the American Association collection has also been performed by 

 the same gentlemen. 



Respectfully submitted, 



H. A. PiLSBRY, 



Conservator. 



