190 REPORT ON ZOOLOGY, MDCCCXL1II. 



weather ; and, witli reference to this point, lie communicates the experi - 

 ments upon which his opposite view is founded. (9) Aye, Diseases, Enemies. 

 (10) Injurious and iiseful properties. 



Max Rosenheyn, with respect to the above-mentioned memoir, refers 

 to the opinion expressed by him several years since as to the influence of 

 electricity on the emission of the filaments, and on the floating of the Spi- 

 ders in the air on their webs. (Preuss. Prov.Blatt. p. 388.) 



' Lettre sur les Araiguees aeronautes du genre Lycose/ 

 par P. Huber (Mem. d. 1. Soc. d. Phys. et (VHist. Natur. 

 de Geneve, x, 1, p. 1.) Observations copiously detailed on 

 the species of Lycosis, with respect to the emission of the 

 filaments, and their flight by means of them. 



Blackwall has made several general communications on 

 this order. 



'On the Palpi- of Spiders' (Report of the 12th Meeting of Brit. 

 Associat. for the Advanc. of Science, held in Manchester, 1842. London, 

 1843). The author describes particularly the use which the Spiders make 

 of their palpi. They serve, partly, for the collection of the loose filaments, 

 partly as in Dolomedes together with the mandibles, for the holding of the 

 ovisac ; in the Sallicitke, in which they are covered with strong hairs, for 

 cleaning the eyes. 



" Notice of several cases of defective and redundant organization observed 

 among the Araueidea." (Ann. Nat. Hist, xi, p. 165. Froriep. Notiz. 25, B. 

 p. 273.) The malformations observed and mentioned by the author refer 

 particularly to supernumerary and deficient eyes ; one case also of a super- 

 numerary tarsus. 



" A catalogue of Spiders not previously recorded or little known as indi- 

 genous to Great Britain (Transact. Linn. Soc. xix, p. 113) though containing 

 almost without exception, species already known, affords nevertheless valuable 

 remarks upon their occurrence and habits, as well as upon the synonymy. 



EPEIKIDES. Koch (Arachu. x Bd. 5 Hft.) has figured Atea incerta, a new 

 species, probably from the East Indies ; and White has characterized, in 

 Dicffeiib. Travels, ii, 272, 42, Tetragnatha (Deinagnatha) Dandridyii, from 

 New Zealand. 



THEEIDITES. Neriene graminicolens is described by Blackwall (Linn. 

 Trans, xix, p. 125) as a new English species, resembling N. trilineata, Koch, 

 even in the uniformly coloured exannulate legs. The genus Neriene, 

 Blackw. (Phil. Journ. 1S33), corresponds with Bolyphantes, Koch. 



DKASSIDES. In the genus Clotho, Koch has figured 5 species (Arachn. x, 5 

 Hft.) : Cl. Coudotii, Latr., from Egypt, and 4 new species, Cl. cycacea, from 

 Italy, Cl.ffnttata, locality doubtful, Cl. stellata, from Portugal, and Cl. lim- 

 bata, from Arabia. The genus Eyo is illustrated (ib. 4th Hft.) with 2 sp., 



