424; Remarks on British Land and Fresh-waier Shells* 



orders, according to the system of Linnaeus, we slmll shortly 

 enumerate. They are confessedly very imperfect, compared 

 with the orders of the most improved modern systems ; but 

 they are nevertheless in such general use, and of such frequent 

 occurrence in works of natural history, that a knowledge of 

 them may be considered essential to every beginner. The 

 more recent systems of insects, as of every other department 

 of zoology, will, no doubt, at a proper time, find a place in 

 the pages of your Magazine. The Linnean orders of the 

 class Insects are seven ; viz. Coleoptera {koleos, a sheoXh, pferon, 

 a wing; wings in sheaths), represented by the common black 

 beetle, dor, or clock-beetle, ^Scarabae^us stercorarius {Jig. 180.) ; 

 2. Hemiptera [hemisu^ half, pteron, a wing; half of one wing 

 overlaid by the other), which may be represented by the com- 

 mon cockroach, ^latta orientalis (seen in j%^. 1. p. 19.) ; 3. Le- 

 pidoptera {lepis, a scale, pteron, a wing ; wings covered with 

 very fine scales), represented by the common butterfly ; 4. 

 Neuroptera {neuron, a nerve, pteron, awing; wings reticulated), 

 represented by the dragon-fly; 5. Hymenoptera (hi/men, a 

 film, pteron, a wing ; wings membranaceous), represented by 

 the bee; 6. Diptera {dis, twice, ptero?i, a wing; two-winged), 

 represented by the common gnat ; and 7. A^ptera {a, privative, 

 pteron, a wing ; no wings), represented by the spider and the 

 centipede. In my next communication, I shall give the natural 

 history of one of the most interesting of the coleopterous in- 

 sects. I remain, Sir, &c. 



A.J.N. 



Art. V. Remarks on British Land and Fresh-ivater Shells, 

 By Mr. Joseph Kenyon. 



Sir, 

 From the study of conchology in general, I have of late 

 directed my attention more particularly to that branch which 

 embraces our native land and fresh-water shells. On attempt- 

 ing, however, to make a systematic list, and refer each species 

 to the works of the different authors to which I have access, I 

 find the synonymes of several involved in much perplexity 

 and doubt ; and as some of your readers may probably be 

 engaged in similar pursuits, and may have access to extensive 

 libraries and cabinets, I beg to trouble you with a few remarks 

 and queries, resulting from my late observations, in the hope 

 of receiving benefit from the labours of those who are more 

 experienced. The names of the species I may have occasion 



