_Idiops syriacus_, Beirût. _Cteniza fodiens (Ct. Sauvagei)_, Corsica, Pisa, Mentone. _Ct. ædificatoria_, Tangiers. _Ct. (Cyrtocarenum) ionicum_, Ionian Islands. _Ct. (Cyrtocarenum) Ariana_, Naxos, Tinos. _Nemesia cæmentaria_, South of France, Spain, Sardinia, Corsica, Sicily, Algiers, and the var. _germanica_ from Wippach, near Görz. [Nests, apparently of the true cork type, have also been found in Australia, New Granada, India, and the island of Formosa, but their occupants are unknown.] Nests of the single-door wafer type. _Cteniza nidulans_, West Indies (and South America?) Nests of the double-door branched type. _Nemesia meridionalis_, Mentone, Cannes, and Sestri, near Genoa. Nests of the double-door unbranched type. _Nemesia Eleanora_, Mentone, and Cannes. As far, therefore, as I know at present, the cork type of nest is the only one which is widely spread, and which is constructed by spiders of more than one species. For, while the single-door wafer, and the branched and unbranched double-door nests are each the work of one particular spider, we see that nests of the cork type are made by spiders of six distinct species, belonging to at least three genera. It is almost certain that a much larger number of spiders of different kinds, though all probably members of the sub-order _Territelariæ_, construct nests of the cork type, for descriptions and specimens of trap-doors of this kind are brought from the most distant parts of the globe. It is true that these specimens and descriptions usually only show us the surface-door, but as far as our present knowledge goes, we are led to suppose that a door of the cork type is always associated with a simple tube, in which there is no trace of a second door or valve, so that, judging of the unknown by the known, we conclude that nests which possess the characteristic peculiarity of a true cork door are true cork nests in other respects also. Further research may possibly show that there are exceptions to this generalization, but I do not at present know of any. I have seen Australian specimens of large trap-doors, of the cork type, measuring from one to two inches across. In some of these the doors were scarcely more than semicircular but very thick, and having their edges bevelled so as to correspond with the sloping margin of the tube;[92] in others, found at Paramatta, and described to me by Lady Parker as being tenanted by a black spider, the doors were said to be circular and much smaller, scarcely larger than a sixpence, and of the cork type. [Footnote 92: Specimens of Australian nests may be seen in the cases at the British Museum.] The upper portion of a nest from New Granada has been figured and described by M. Victor Audouin,[93] which closely resembles that drawn at Fig. A in Plate VII., p. 88, but the door is about a third larger.