little known as indigenous to Great Britain. 12] 



I am indebted to C. C. Babington, Esq., for specimens of this fine spider, 

 which is found in the fens of Cambridgeshire. Like bycosa piraJica and .// 

 gyroneta aquatica, it descends spontaneously beneath the surface of water, the 

 period of time during which it can respire when immersed depending upon the 

 supply of air enveloping its body. In May the female deposits several hun- 

 dred eggs in a globular cocoon of brown silk, of a compact texture, measuring 

 fths of an inch in diameter, which she carries under the sternum, supporting 

 it in that situation by means of the mandibles and palpi, additional aid being 

 derived in all probability from silken lines connecting it with the spinners ; a 

 method which I have discovered that Dofotnedes mirabiUs constantly employs 

 to retain its cocoon in a similar situation. This interesting fact supplies a new- 

 link in the chain of analogies which connects the genus Dolomedes witli thai 

 of Lycosa. 



Family Salticidj:. 



Genus Salticus, Latr. 



18. Salticus cupreus. 



Salticus cupreus. Hahn, Die Arachn. b. ii. p. 42. tab. lv. fig. 128. 

 Salticus ceneus. Hahn, Die Arachn. b. i. p. 65. tab. xvii. fig. 49. 

 Salticus Jlavipes. Hahn, Die Arachn. b. i. p. 66. tab. xvii. fig. 50. 

 Attus cupreus. Walck. Hist. Nat. des Insect. Apt. t. i. p. 409. 



Crevices among detached pieces of rock accumulated in heaps are the favour- 

 ite haunts of this species, which occurs in woods growing in the mountainous 

 parts of Denbighshire and Caernarvonshire. In June the female encloses her- 

 self in a cell of beautifully white silk, of a compact texture, on the exterior 

 surface of which particles of soil, withered moss, and other materials are some- 

 times sparingly distributed ; she usually attaches it to the under side of stones 

 or dead leaves, depositing in it from 20 to 30 spherical eggs of a pale yellow 

 colour, which are connected by fine lines of silk. 



19. Salticus coronatus. 



Attus coronatus. Walck. Hist. Nat. des Insect. Apt. t. i. p. 412. 

 Salticus Blancardii. Hahn, Die Arachn. b. i. p. 64. tab. xvi. fig. 48. 

 vol. xix. r 



