DESCRIPTION OF COLOURED PLATES. XIX 



cellaria forcepiforma, from the same — 95. Cristatella mucedo, statoWast — 

 96. Cristatella mucedo, statoblast, edge-view— 97. Early stage of develop- 

 ment of same — 98. Loi)hopus crystallinus— 99. Plumatella repens and ova, 

 on a piece of submerged stem — 100. Taenia echinococcus — 101. Hydatids in 

 human liver -102. Billiarzia hcematobia— 103. Ami)histoma conicum — 104. 

 Trichina spiralis from Hambro' pork — 105. Trichina spiralis extracted — 

 106, 107. Fasciola gigantea, after Cobbold. 



PLATE Y.—Fage 541. 



MOLLUSCA. 



Fig. IDS. Velutina laevigata, portion of lingual membrane— 109. Velutina laevi- 

 gata, part of mandible — 110. Hybocystis blennius, portion of palate— 111. 

 Sepia officinalis, portion of palate— 112. Aplysia hybrida, part of man- 

 dible — 113. Loligo vulgaris, part of palate— 114. Haliotis tuberculatus, part 

 of palate — 115. Cistula catenata, part of palate — 116. Patella radiata, part 

 of palate — 117. Acmeoea virginea, part of palate— 118. Cymba olla, part of 

 palate — 119. Seapander ligniarius-120. Oncidoris bilamellata, part of 

 palate— 121. Testacella Mangel, part of palate — 122. Pleurobranchus plu- 

 mula, part of mandible— 123. Turbo marmoratus, part of palate. 



Figs. 108 to 123, Lingual membranes of Molluscs ; the drawings 

 made by Mrs. Maples from specimens in the late S. P. Wood- 

 ward's collection, by kind permission of E. Edwards, Esq. 



Chosen without any special order, and simjjly as showing good 

 examples of the wonderful forms met with in the mouth-armature 

 of Gasteropod and Cephalopod Mollusca ; viewed by polarised light 

 and selenite stage. 



"^o^ 



PLATE YL—Fage 579. 



INSECTA. 



Fig. 124. Egg of Caradina Morpheus, Mottled Rustic Moth — 125. Egg of Tortoise- 

 shell Butterfly, Vanessa Urtica — 126. Egg of Common Footman, Lithosia 

 complanula — 127. Egg of Shark Moth, Cucullia Umbratica — 128. Maple- 

 aphis— 129. Egg-shell of Acarus, empty — 130. Egg of House-Fly — 131. 

 Mouth of Tsetse-Fly, Glossina morsitans — 132. Vapourer Moth, Orgyia 

 antiqua: antenna of male— 133, Vapourer Moth, antenna of female; a. 

 branch more magnified to .show rudimentary condition of the parts — 

 134. Tortoise-shell Butterfly; head in profile, showing large compound 

 eye, one of the palpi, and spiral tongue — 135. Tortoise-beetle, Cassida 

 viridis ; under surface of left fore-foot, to show the bifurcate tenent ap- 

 pendages, one of which is given at a. more magnified. This form of 

 appendage is characteristic of the family. See West on Feet of Insects, 

 Linn. Trans, vol. xxiii. tab. 43 — 136. Egg of Blue Argus Butterfly, 

 Poly omonatus Argus — 137. Egg of Mottled Umber, Eranis Defolaria — 

 138. Egg of Ennomos erosaria, Thorn- Moth — 139. Egg of Aspilates Gilbaria, 

 Straw Belle — 140. Blow-fly, Musca Vomitoria; left fore-foot, under- 

 surface, to show tenent hairs ; a b more magnified ; a from below, 6 

 from the side— 141. House-fly larva — 142. Amara communis, left fore-foot, 

 under-surface, to show form of tenent appendages, of which one is given 

 more magnified at a. These, in the ground beetles, are met with only in 

 the males, and seem to be used for sexual purposes. The way in which 

 they are protected when not in use is shown by T. West — 143. Ephydra 

 riparia : left fore-foot, under-surface. This fly is met with sometimes in 

 immense numbers on the water in salt-marshes ; it has no power of climb- 

 ing on glass, which is explained by the structure of the tenent hairs ; 

 the central tactile organ also is very peculiar, the whole acting as a float, 

 one to each foot, to enable tlie fly to rest on the surface of the water ; a. one 



