Figs. 1-5 are all one species; _levana_ being the winter form, _prorsa_ the summer form, and _porima_ intermediate. Similarly 6-7 are the same species, _meione_ being the southern form. So with 8-9 and 11-13, which are only seasonal varieties. Here we can actually trace the way in which varieties are formed. _See_ Weismann's work, cited in the text. PLATE VI. _Syncoryne pulchella_, magnified. After Professor Allman. _p._ 62. Gymnoblastic or Tubularian Hydroids. Ray Soc., 1871, pl. vi., figs. 1 and 3. Fig. 1. A planoblast as seen passively floating in the water after liberation. Fig. 2. The entire hydrosoma of syncoryne. _a._ The spadix. _b._ The medusæ or planoblasts in various stages of development. PLATE VII. _p._ 80. Fig. 1. _Deilephila galii_, immature. Fig. 2. Ditto brown variety, adult. Fig. 3. _Deilephila euphorbiæ._ Fig. 4. _Sphinx ligustri._ Fig. 5. _Deilephila euphorbiæ_, dorsal view. Fig. 6. _Orgyia antiqua._ Fig. 7. _Abraxas grossulariata._ Fig. 8. _Bombyx neustria._ Fig. 9. _Callimorpha dominula._ Fig. 10. _Euchelia jacobæa._ Fig. 11. _Papilio machaon._ SPIDERS. PLATE VIII. Fig. 1. _Segestria senoculata_, female. _p._ 84. Fig. 2. _Sparassus smaragdulus_, male. Fig. 3. _Lycosa piscatoria_, female. Fig. 4. ---- _andrenivora_, male. Fig. 5. ---- ---- female. Fig. 6. ---- _allodroma_, male. Fig. 7. ---- _agretyca_, male. Fig. 8. ---- _allodroma_, female. Fig. 9. Diagram of _Lycosa_, showing form and position of vessels. After Gegenbaur. Fig. 10. _Lycosa campestris_, female. Fig. 11. _Thomisus luctuosus_, male. Fig. 12. _Salticus scenicus_, female. Fig. 13. _Lycosa rapax_, female. Fig. 14. ---- _latitans_, female. Fig. 15. _Theridion pictum_, female. Fig. 16. _Lycosa picta_, female. Fig. 17. ---- ---- male. All the above are British species, and copied from Blackwell's "Spiders of Great Britain and Ireland." Ray Soc., 1862. FISHES. PLATE IX. Fig. 1. Windermere Char. _Salmo Willughbii._ A species _p._ 88. peculiar to our North of England lakes. Fig. 2. Perch, _Perca fluviatilis_, showing the modified rib-like markings. SUNBIRDS.