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.