33* THE YOUNG 



it often becomes a matter of difficulty to 

 get the animal out. The larger ones 

 may be removed with a pin, a process 

 we may see carried on at any street 

 corner where periwinkles are sold, but 

 such rough usage will not do for the 

 more delicate land and fresh water shells. 

 With these it is necessary to kill the 

 animal while expanded, and this may be 

 done by placing them first in cold water, 

 when land shells as well as water shells 

 will expand ; the former even more so 

 than the latter, stretching their bodies 

 to the uttermost in their endeavours to 

 escape from the unnatural element. 

 When thus extended, hot water should 

 be gradually added, so as to kill them 

 without their drawing back into the 

 shells. They may then be boiled or 

 scalded and the animal is easily removed. 



We will not pretend to decide which 

 is the best method of arranging them in 

 the cabinet. Some prefer little card- 

 board boxes with or without glass lids, 

 or they may be displayed on cards or 

 glass tablets. We have a preference 

 for the latter method, which enables a 

 good deal of information as to locality, 

 &c, where the specimen was obtained, 

 to be written with the name of the 

 species. The largest collection we ever 

 saw had the species in neat little card- 

 board boxes ; the best arranged collec- 

 tion we ever saw had them arranged on 

 plate glass tablets neatly covered with 

 light drab paper, and with a piece of 

 either black or white paper pasted on 

 the central portion, leaving about quarter 

 of an inch margin all round. No doubt 

 this was a deal of trouble, but it looked 



NATURALIST. 



wonderfully well, and the smaller shells 

 were seen to best possible advantage. 

 If this method be adopted, the shells 

 should be gummed on so as to show the 

 various parts. Univalves must show both 

 spire and mouth, bivalves both the 

 inside and the outside of the valve. 



TO CORRESPONDENTS. 



All communications to be sent to J. E. Bobson, BeHerby 

 Terrace, West Hartlepool ; or to S. L. Mosley Beau- 

 mont Park, Huddersfield. 



The next part of Mr. Mosley s "Varieties 

 of British Lepidoptera" will contain several 

 plates of remarkable varieties of the genus 

 Cidavia. He will be glad to hear of any 

 striking forms he has not yet figured, es- 

 pecially of Immanata and Russata. 



EXCHANGE. 



Duplicates. — Rhamni, Cardmines, JEgeria, 

 Auriflua, Menthastri, Litbvicipeda, Caja,Oxya- 

 canthct, Polyodon, Pvonuba, Orbona. Rumicis, 

 Elinguaria, Amataria. Desiderata. -Sinapis, 

 C. Album, T. Quercus, W. Album, Mundana, 

 Camelina, Ziczac, Herbida, Adusta, Myrtilli, 

 Conspicuata, Dealbata, Notata, Fasciaria, Punc- 

 taria, Candidata, Bisetata, Exanthemaria, &c. 

 — H. Frere, Queen's Road, Kingston-on- 

 Thames. 



Will exchange British birds' eggs and 

 butterflies for foreign ones and skins. — John 

 Eggleston, Park Place, West Sunderland. 



Duplicates : Larvae of P. bucephala, and 

 larvae or pupae of V.c-album. Desiderata : 

 numerous, larvae preferred to imagines. — 

 (Miss) R. Prescott Decie, Bockleton 

 Court, Tenbury. 



Larvae of H. pisi, Oleracea, and A. psi, 

 imagines of P. chi. Desiderata very num- 

 erous.— -F. G. Scott, 4, Queen-street, New-i 

 castle-on-Tyne. 



