Sdentijic and General Memoranda. 527 



«5 Geological Mamtal, by Henry T. De la Beche, F. R. s. f. g. s. 

 &c. &,c. — We have received the second edition, corrected and 

 enlarged, of this very instructive work. The lists of organic 

 remains have been corrected, and additions made to them, as 

 well as to the body of the work. 



On the Means by which certain Animals ascend the Vertical Sur- 

 faces of highly polished Bodies. — Mr. Blackwall has read a paper 

 before the Linneean Society of London, showing that insects ef- 

 fect their progress upon the vertical sides of smooth objects, by 

 the agency of an adhesive secretion, emitted by the instruments 

 they employ in climbing, and which proceeds from the fimbi-i- 

 cated under surface of the dilated extremities of the toes. 



Services rendered to A''atural History, by E. W. A. Drummond 

 Hay, Esq. — This gentleman, who is British resident consul at 

 Tangier in Morocco, has set a bright example to all official per- 

 sons resident in foreign countries, and deserves to be honourably 

 noticed by naturalists. He has lately sent to the Zoological So- 

 ciety of London, two Ichneumons {Herpestes Pharao?iis. Desm.), 

 and a pair of striped Barbary mice {mtis barbarus. Linn.) With 

 them came also four young ostriches, as a present to the king of 

 England, from the sultan of Morocco. They were taken in a re- 

 gion of the Desert called Hamadah. Although they have not 

 yet acquired their adult plumage, yet the precocity of the sexes 

 was indicated by unequivocal actions, whilst at Tangier. The 

 king has presented the ostriches to the Zoological Society. 



Petrefacta Musd Bonensis, by Professor Goldfuss. — The third 

 part of this beautiful work has just appeared, and is fully equal 

 to the preceding ones. It contains the stellerides, encrinites, and 

 serpulites, with some additional species of corals. It contains 

 twenty-five splendid lithographs, and eighty pages of letter-press. 

 The learned author has paid much attention to synonymes, and 

 has done a great deal towards clearing up the confusion they 

 have created. 



Birds of Europe. — Mr. Gould, author of " Illustrations in Orni- 

 thology, from the Himalay mountains, is about to publish a new 

 work on the birds of Europe, the first part to appear on the 



