Claws, compared in different trap-door spiders, 86; retractile, 87 (note). Construction of trap-door nests, 118, 122, 123, 149. Cork nests, 80, 88, 94, 97, 116, 124, 131, 132, 141. Costa (O. G.), on Mygale (Nemesia) _meridionalis_, 105, 137. Cteniza _ariana_, 115, 135, 141; _ædificatorius_, 85; _fodiens_, 89; _ionica_, 91; _nidulans_, 81. Double-door branched nest, 80, 98, 103-106, 131. Double-door unbranched nest, 80, 98, 106, 111, 131. Dufour (Léon), on the nest of Lycosa _tarentula_, 146. Enemies of spiders, 101, 134. Epeira _fasciata_, cocoon of, 76. Erber, on the nocturnal habits of Cteniza _ariana_, 115, 135, 141. Geographical range of species of trap-door spiders, 131, 132, 133, 143. Gosse (P. H.), on the single-door wafer nest in Jamaica, 80-83. Instinct (?) of nest building in very young spiders, 123, 126, 128. Lucas (H.), on spiders having retractile claws, 87. Lycosa _tarentula_, M. Dufour on the nest of, 146. Male of Nemesia _Eleanora_, 109, 115. Mygalidæ, name changed to Territelariæ, 75. Nemesia _cæmentaria_, 73, 92, 97, resisting when the door is touched, 94-96; _cellicola_, 141, 147, 148; _Eleanora_, 98, 106, 108, 112; _Manderstjernæ_, 147; _meridionalis_, 98, 101, 137. Nest of Lycosa _tarentula_, 146. Nocturnal habits of trap-door spiders, 115, 116. Olivier, on cork nests at Hyères, 115. Rossi (P.), on Cteniza _fodiens_, 73. Resistance of spiders when doors are touched, 94-96, 100, 112. Saunders (S. S.), on Cteniza (_Mygale_) _ionica_, 91, 122. Sauvages (Abbé), on Nemesia _cæmentaria_, 73. Selection of materials for trap-doors, 119, 120. Sells (W.), on the nest of Cteniza _nidulans_, 83. Single-door wafer nests, 80, 131. Tarsi of spiders furnished with a viscous secretion, enabling them to traverse perpendicular polished surfaces, 87. Territelariæ a sub-order of Araneæ, formerly called Mygalidæ, 75. Territelariæ, species of, inhabiting the Mediterranean region, 130, 131, 133, 143. Theridion, cocoon of, 77. Trap-door nests enlarged not abandoned, 123, 127, 150. Walckenaer (C. A. de) on habits of trap-door spiders, 114, 117; on structure of cork doors, 125 (note). Wallace (A. R.) on the philosophy of birds' nests, 129. West Indian nests of the single door wafer type, 80. Westwood (Prof.) on the nest of Cteniza _ædificatorius_, 85. Young spiders found in nests of Nemesia _meridionalis_ and N. _Eleanora_, 112. * * * * * Transcriber's Note Minor typos corrected. Text rearranged so that illustrations will not split paragraphs. For a number of species that list a pair of alternate Genera in italics with an unitalic "or" between them in the text, the italics markup includes the "or".