498 Mr. J. Blackwall on the Sttmcture, Functions , (Economy , 



Portland, on the 29th of September 1854 ; and the two latter 

 were captured in July 1854, in Morden Park, near Bloxworth 

 House, Dorsetshire, by the same gentleman. 



After Lycosa piratica in the catalogue (Ann. and Mag. Nat. 

 Hist. 2nd Series, vol. vii. p. 397) add 



Lycosa piscatoria, 



Lycosa (Potamia) piscatoria, Koch, Die Arachn. B. xv. p. 6. 

 tab. 506. figs. 1417-1419. 



Mr. R. H. Meade took adult males and females of this species, 

 which is closely allied to Lycosa piratica, in the last week of 

 June 1856, in a swampy piece of ground in Buckinghamshire, 

 and transmitted them to me for inspection. 



Family Salticid^e. 



Genus Salticus, Latr. 



After Salticus Jenynsii in the supplement to the catalogue 

 (Ann. and Mag. Nat. Hist. 2nd Series, vol. xiv. p. 29) add 



Salticus Blackwallii. 



Salticus Blackwallii, Clark, Ann. and Mag. Nat. Hist. 2nd Series, 

 vol. xvi. p. 329. 



This fine species was discovered by the Bev. Hamlet Clark 

 in September 1855, on a gate near the sea-shore, at Southport 

 in Lancashire. 



Family TnoMisiDiE. 



Genus Thomisus, Walck. 



After Thomisus erraticus in the catalogue (Ann. and Mag. 

 Nat. Hist. 2nd Series, vol. vii. p. 449) add 



Thomisus sabulosus. 



Thomisus sabulosus, Hahn, Die Arachn. B. i. p. 28. tab. 8. fig. 24. 

 Xysticus sabulosus, Koch, Die Arachn. B. xii. p. 64. tab. 411. 

 figs. 999, 1000. 



M. Walckenaer has placed this spider among the synonyma 

 of Thomisus cristatus, from which it differs in size and in the 

 design formed by the distribution of its colours ; and on refer- 

 ring to M. Koch^s ' Uebers. des Arachn. Syst.' erstes Heft, 

 p. 25, it will be seen that Thomisus sabulosus had been con- 

 founded with Thomisus lanio [Xysticus lanio, Koch) by that 

 arachnologist, an error which he afterwards corrected in treating 

 on the species in the twelfth volume of ' Die Arachniden,^ p. 66. 



