344 Mr. P. H. Gosse on a new genus and 



brown mingled with yellowish brown; white, iridescent, scale-like 

 hairs are distributed over its surface, and a spot composed of 

 dense white hairs occurs immediately above the spinners. 



The spider from which the foregoing description was made is 

 preserved in Canada balsam, and has suffered from compression ; 

 consequently, my account of it is not so complete as it would 

 have been could 1 have examined it more perfectly. After a 

 most careful and prolonged inspection under the microscope I 

 could not ascertain that it had more than six eyes, which are 

 arranged in the order stated above ; but even should it ultimately 

 be found to possess eight of those organs, it must still, by its 

 other essential characters, constitute a new genus. 



I feel sincere pleasure in dedicating this remarkable species to 

 Francis Walker, Esq., F.L.S., a distinguished naturalist, well- 

 known to the entomological readers of the ' Annals and Magazine 

 of Natural History' by his valuable papers on Aphides; and I 

 gladly avail myself of this opportunity to express my thanks to 

 Mr. Walker for his liberality in permitting me to publish de- 

 scriptions of any Araneidea contained in his cabinet which I 

 suspected to be unknown to arachnologists. 



Schcenobates Walkeri was taken at Broadstairs in Kent in the 

 month of September, and is in Mr. Walker's collection of Arach- 

 nida. 



XXX. — Descriptions of a new genus and six new species of Saurian 

 Reptiles. By P. H. Gosse, A.L.S. 



Family Iguanad^. 



1. Anolis iodurus. The Purple-tailed Anolis. Crest on the 

 nape prominent : ventral scales smooth, roundish ; those of the 

 back small, many-sided, keeled ; those of the sides granular : tail 

 rather compressed, slightly crested. S . Length of body 2 inches ; 

 of tail 3 inches ; total 5 inches. Glaucous green, marked with 

 irregular waved lines of a darker shade ; upper surface of the head 

 marked with pale dots, confluent : sides yellow-green, sometimes 

 brassy : basal portion of the tail brilliant light purple ; the tei'- 

 minal two-thirds pale brown : under parts of the body and limbs 

 pale glaucous : goitre bright orange. 



The colour changes under the excitement of fear or anger to 

 sooty brown, usually paler on the part which before was purple ; 

 the legs appear banded with transverse pale lines : under parts 

 brownish gray, obscurely spotted with brown. 



Sometimes the general colour is a chaste gray, tinged with 

 reddish violet on the neck and shoulders ; the purple of the tail 

 bright. 



