452 



MICHIGAN SURVEY, 1905. 



desired to have a card for every entry, they can be smaller than where it is 

 desirable for economy of space to have as many entries as possible on one 

 card. In the latter case a convenient size is that of the ordinary library 

 card, which can be ruled to hold twenty entries. The following is a form 

 of such a card: 



Albolahris (Say). 





Polygyra 



No. i- Ann Arbor, Mich. 



No. 





No. 



No. 





No. 



No. 





No. 



No. 





No. 



No. 





No. 



No. 





No. 



No. 





No. 



No. 





No. 



Qno 





No. 



No. 





1 



The name of the species is written on the top, and the number of each 

 entry of that species and the locality is entered below. Such a card as this 

 enables the collector to see at a glance not only whether any given species 

 is represented in his collection, but also from what localities, and saves a 

 large amount of time which would otherwise be spent in turning over the 

 leaves of a serial catalogue. 



The cards can be kept in drawers or boxes of proper size and can- be ar- 

 ranged alphabetically under the different genera and famiUes. Guide 

 cards slightly higher than the ordinary card, indicating the genera, can be 

 inserted in their proper places. I i .. I 



In collections intended for public exhibition, it is usually necessary to 

 have the specimens mounted on cards or blocks. But in private collections 

 such an arrangement is a mistake. Not only on account of the greater 

 room required for the collection, but particularly because it prevents the 

 handling of the specimens for purposes of study. 



Specimens under an inch in diameter are most conveniently kept in glass 

 vials. . These can be obtained from any wholesale druggist. They should be 

 without a neck and of standard sizes. The length will depend upon the 

 standard size of the tray adopted. For my own collection I use four sizes, 

 }, \, f, and I inches in diameter. As these vials are rather fragile, the 

 pressure of the cork is apt to break them. The cork should therefore be 

 softened by rolling or crushing.- A pair of plumber's burner-plyers is useful 

 for this purpose. The serial number should be put on the cork or on a 

 small piece of paper inside. Specimens too large for the vials should have 



