26 



The selection of fossil species designed to make part of the 

 Systematic Collection of Mollusca has been completed, and the 

 Tertiary species have been mounted. 



The difficulty of procuring suitable tablets has greatly delayed 

 the work of remounting the recent shells set apart for exhibition 

 in the Systematic Collection, but since the receipt of tablets the 

 mounting has been in progress, and arrangement in the new cases 

 will keep pace with the mounting. 



Owing to the pressure of other work, conch ological exchanges 

 have been carried on only with a few old and valued correspond- 

 ents. Offers of new exchanges have been necessarily declined. 



Intervals of time not otherwise occupied have been given to 

 revision of recent Lamellibranchiata, which, discontinued in 

 1877, was in part resumed last year. 



Miss Anthony, besides her usual work of cleani-ng and mount- 

 ing specimens, has rendered efficient help in assorting fossils. 



The receipts of shells by exchange have been six packages, comprising 

 three thousand, nine hundred and forty -five specimens of two hundred 

 and fifteen species. Consignments sent in return have numbered five 

 packages, one thousand, seven himdred, and forty-two (1742) specimens 

 of two hundred and forty-eight (248) species. 



