[8] April 4, 1896. [9] _Popular History of the Aquarium_, p. 258. [10] May 2, 1896. [11] International Science Series, No. lxv. [12] _Aquatic Insects_, pp. 55, 56. [13] _Zeitschrift f. wiss. Zoologie_, Bd. xl. S. 481. [14] _Mémoires du Muséum d’histoire naturelle_, xviii. 454 sqq. [15] I have purposely given _Blatta_ as the generic name, rather than _Stilopyga_, which should properly be used, as the former is only employed in very recent literature. [16] Miall and Denny, _The Cockroach_, p. 20. [17] _Cambridge Natural History_, v. 231. [18] _The Senses of Animals_, p. 44. [19] _Cambridge Nat. Hist._ v. 223. [20] _Book of Nature_, p. 94. [21] This refers to the gizzard. _Echinus_ was used to denote the third stomach of Ruminants (now called the manyplies), because it was thought to resemble a hedgehog rolled up. [22] Miall and Denny, _The Cockroach_, p. 118 (note). [23] _Introduction to Entomology_, letter xi. [24] _Proceedings of the Zoological Society_, 1892, p. 586. [25] _Our Household Insects_, pp. 159–163. [26] Kirby and Spence, _Introd. to Entomology_, ed. 1870, p. 484. [27] _Cambridge Natural History_, v. 318. [28] _The Senses of Animals_, p. 75. [29] J. Arthur Thomson, _Outlines of Zoology_, p. 288. [30] _Science for All_, ii. 178. [31] _British Spiders_, p. 10. [32] _British Spiders_, p. 359. [33] _Naturalist in La Plata_, p. 188. [34] _Mémoires_, vii. p. 304 sqq. [35] _Book of Nature_, pp. 101, 102. [36] _Mémoires_, vii. 144, 145. [37] The specimen was kindly identified for me, by Dr. Trouessart of Paris, as a nymph of _Hydrachna globula_ (Dugès), and has been deposited in the British Museum (Natural History). [38] _Mémoires_, vii. 123–128. [39] _Cambridge Natural History_, vol. v. ch. ii. [40] _Nature_, Dec. 12, 1895. [41] _Mémoires_, vii. 569. [42] _Crustacea_, p. 7. [43] _Crustacea_, p. 225. [44] International Science Series, No. lxxv. [45] ‘A limb is _chelate_ when it has joints that will act together like a pair of tongs. Generally this character is produced by the hinging of the seventh joint a considerable way down on the side of the sixth. When the seventh joint, or finger, can be folded back upon the sixth, although the latter is not produced into any thumb-like process to oppose it, the limb is then said to be _sub-chelate_, the claw being in that case partial, though often extremely efficient.’ Stebbing, _Crustacea_ (International Science Series, lxxiv), p. 45. [46] _Popular History of the Aquarium_, p. 223. [47] Lubbock, _Senses of Animals_ (International Science Series, lxv.), p. 93. [48] _Aquarium_ (ed. 1856), pp. 41, 42. [49] _Crustacea_ (International Science Series, lxxiv), pp. 8, 9. [50] Bate and Westwood, _British Sessile-eyed Crustacea_, i. 8. [51] _Trans. Connecticut Academy_ (1882), iv. 274, 275, note. [52] _Ponds and Rock Pools_, p. 118. [53] _British Sessile-eyed Crustacea_, i. 21. [54] _Proceedings Nat. Hist. Soc. Glasgow_, vol. i. pt. ii. n. s. pp. 130–132.