10 



an elaborate treatise upon the Gammarus Pulex, in ^^ liieli the eir- 

 culation of the blood lias been perceived '. 



We look forward also with interest to Captain James Ross's pub- 

 lication of the Crustacea brought home in the last Northern Expe- 

 dition, as well as to the result of Mr. W. Baird's examination of the £"«- 

 tomostraca of BerAvickshire. Our own Society has not been entirely 

 destitute of observations upon this class; being indebted to Lieut.- 

 Col. Sykes and Mr. Sells for some verbal conmiunications relative to 

 the natural history of the Land Crabs of the East and West Indies, 

 and I have submitted to you a memoir upon the characters and affi- 

 nities of the osculant genus Arcturus of Latreille'^. 



The class Arachnida has, in like manner with the former, met with 

 but little favour from the majority of entomologists, few having un- 

 dertaken its investigation; still our list is by no means destitute of 

 interest. 



The classification of the great typical order of Spiders has recently 

 undergone revision by the most celebrated of arachnologists, Baron 

 Walckenaer^, whilst M. Dufour has described various species, natives 

 of Europe*, and M.Lucas, one of the zoologists employed at the 

 Jardin des Plantes, has published the descriptions of various curious 

 exotic species in different numbers of the ' Annales' of the French En- 

 tomological Society. M. Hahn has commenced the publication of a 

 work containing beautiful illustrations of the species of Arachnida \ 

 In England Mr. Blackwall has much increased the knowledge of the 

 habits of the indigenous groups, adding also various new genera and 

 species to our lists •^ ; and an anonymous author in the Mag. of Nat. 

 Hist, has commenced the publication of a series of articles upon the 

 Spiders, in which great talent is displayed. The absence of this gen- 

 tleman from England has prevented the continuance of the publica- 

 tion of his researches, but as his return is shortly expected, it is to be 

 hoped that no further delay will take place, since his illustrations 

 (as I can affirm from an inspection of them,) are of a very high 

 character. M. Audouin has published an interesting memoir upon 

 the nest of one of the burrowing Spiders"; and Mr. Sells has had the 

 kindness to present our Society with a specimen of a similar nest 

 from the West Indies. Mr. W. S. MacLeay has likewise published a 



' De Gamniari Pulicis Fabr. Historia Naturali atque Sanguinis Circuitu Commen- 

 tatio. Aiict. J. C. Zeneker. Jenas, 1832. 4to. 



" Since this Report was read, several curious species, collected by Mr. Hailstone, 

 jun., on the southern coast of England, have been described in the Magazine of 

 Natural History for May 1835. 



^ In the Annales de la Societe Entoniologique de France, Vol. II. No. 3. 



M. Walckenaer has also lately commenced the publication of a work entitled ' Les 

 Araneides de France classees par leur Organisation', &c. (L'Institut, No. 53) quoted 

 by Mr. Jenyns, Report on Zoology, p. 203. 



■* Annales des Sc. Phys. Brux., Tom. IV.; Ann. des Sc. Nat., Tom. II. et XXII. 



' Die Arachniden-Gelreu nach der Natur abgebildet und beschrieben. Von Dr. 

 Carl Wilhelm Hahn. Nurnberg, 12mo, in parts, 1831 — 1835. With coloured plates. 



* Linnaean Transactions, Vols. XV. and XVI.; and London and Edinburgh 

 Philosoph. Mag., May 1833-34. 



? In the Annales de la Societe Ent. de France, Vol. II. No. 1. 



