f iii ) 



mixed up witli otlier si^ecies in sucli a way, that no one wlio 

 was not thorouglily acquainted with the genus could under- 

 stand what they were. 



Lord Walsingham reviewed Mr. Elwes' paper in detaih 

 He remarked that the larvre of the different species of the 

 Satyridit were very similar, and diflicult to distinguish, and 

 that this difficulty was increased by the fact that they were 

 all night-feeders. With reference to Mr. Elwes' observations 

 as to the form of the claspers not being constant in species, 

 Lord Walsingham said that so far as he was able to judge by 

 having worked out this character in one small group of genera, 

 he should say it was fairly constant ; indeed, he thought the 

 case analagous to that of the mechanical arrangement of a 

 lock and key. With regard to Mr. Elwes' remarks on the 

 subject of the Zeller collection, the President observed that 

 old labels ought always to be retained, and he could not 

 believe that any had been removed in this instance. 



Dr. Sharp remarked that he had devised a system for 

 the preservation of the value of such collections as that of 

 Zeller, and yet permitting their incorporation with a general 

 collection. The collection to be incorporated should first be 

 gone through, and the specimens numbered consecutively 

 from beginning to end, " coll. Zeller 1," " coll. Zeller 2," 

 and so on ; when this was completed the labels under which 

 the collection was arranged should be removed one by one 

 and pasted into a book entitled " Coll. Zeller," and as this 

 was done the numbers of the specimens that stood under each 

 label should be entered into the book in which the labels were 

 pasted. After this was accomplished the specimens might be 

 re-arranged completely, and yet the position any particular 

 specimen occupied in the original collection could at any time 

 be ascertained by referring to the number on the label and 

 comparing it with the Zeller book. He had carried this out 

 in the case of Dejean's Collection of Lamellicorns and 

 DytiscidcB, and could say that it gave but little trouble, which 

 was well repaid by the preservation intact of the traditional 

 value of the collection. 



Mr. M'Lachlan said he was much opposed to the 

 incorporation of typical collections of any Order into the 



