Bibliographical Notices. 139 



existing, and in some degree still continuing, in our knowledge of 

 this higher class of living beings. 



Scotland being almost in every part an alpine country, and abound- 

 ing in large rivers and innumerable mountain streams, with lochs in 

 an equal proportion and variety, affords an ample field for the illus- 

 tration of this group. This great characteristic mark of its fresh - 

 waters, and opportunities having occurred here more frequently for 

 the examination of the various species, and their habits, than in the 

 other parts of Great Britain or Ireland, induces the author to restrict 

 the work, and give the illustration of this range of country complete 

 in itself. At the same time, with a few exceptions, all the British 

 species will be represented ; and it is proposed, if a moderate success 

 attend the publication of this work, that two additional Fasciculi 

 shall be devoted to the illustration of those species and varieties of 

 England and Ireland, which do not occur in the sister kingdom. 



The illustrations will be published in Fasciculi of six plates each. 

 The first will be ready for delivery to Subscribers in November, and 

 will contain figures of, 1. S. Salar, young or Gilse; 2. Do. do. va- 

 riety ; 3. S. albus of Fleming, or Herling of the Solway ; 4. S. ferox ; 

 5. S.fario, lacustrine varieties ; 6. Coregonus Willughbii or Loch- 

 maben coregonus. The volume of descriptive letter-press will be 

 printed in*an octavo size, and will be published on the completion of 

 the illustrations. In this will be detailed, as far as possible, the na- 

 tural history of the family, and it will be accompanied with nume- 

 rous plates and wood-cuts, illustrating the parts connected with the 

 external characters, scaling, structure, food, parasites, &c. 



Information is earnestly requested on any subject connected with 

 the above work, to be addressed to Jardine Hall, by Lockerbie, Dum- 

 friesshire. 



Intended to be published by Subscription, in One Volume, demy 

 8vo, Monographia Anoplurorum Britannia, ; or an Essay on the 

 British Species of Parasitic Insects belonging to the order Anoplura 

 of Leach. By Henry Denny, Esq. 



The object of the present Monograph is to combine in one vo- 

 lume highly magnified figures and descriptions of all the species of 

 parasitic insects belonging to the families Pediculidce and Nirmida, 

 found in Great Britain, "many of the individuals of which being the 

 companions and consequence of poverty and filth, are regarded in 

 general rather as objects of disgust than of attraction : from this 

 cause and perhaps too from their minuteness, these insects have hi- 

 therto excited less attention amongst naturalists than their singular 



