DESCRIPTION OF COLOURED PLATES. XIX 



cellaria forcepiforma, from the same 95. Cristatella mucedo, statoblast 

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

 ment of same 98. Lophopus crystallinus 99. PlumateUa repens and ova, 

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

 human liver ^-102. Bilharzia haematobia 103. Amphistoma conicum 104. 

 Trichina spiralis from Hambro' pork 105. Trichina spiralia extracted 

 106, 107. Fasciola gigantea, after Cobbold. 



PLATE y.Page 538. 



MOLLT7SCA. 



Fig. 108. Velutina Isevigata, portion of lingual membrane 109. Velutina Isevi- 

 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. Acmecea virginea, part of palate 118. Cymba olla, part of 

 palate 119. Scapander ligniarius 120. Oncidoris bilamellata, part of 

 palate 121. Testacella Maugei, 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, now the property of F. E. Edwards, Esq. 



Chosen without any special order, and simply 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. 



PLATE VI. Page 576. 



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, 

 Polyommatus Argus 137. Egg of Mottled Umber, Erannis Defolaria 

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

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

 surface, to show teuent 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 the fly to rest on the surface of the water ; a. one 



