_Fig._ 86. Hartea elegans--87. Side view of Synapta spicula--88. Ophioglypha rosula (very immature specimen): _a._ Claw hooks; _b._ palmate spicula. The development of this species is described by G. Hodge, in “Transactions of Tyneside Naturalists’ Field-Club”--89. Spine of a star-fish, particularly interesting as showing the reticular calcareous network obtaining in this as in all other hard parts of the Echinodermata--90. Very minute Spatangus, obtained from stomach of a bream: many of the spines are gone, but the structure of the shell is intact and forms a beautiful object, interesting in connection with the source whence obtained--91. Ophioglypha neglecta: wriggling or brittle starfish. The plate does not admit of a figure on a scale sufficient to show the full beauty of this object--92. Tubularia Dumortierii--93. Pedicellaria mandibulata from Uraster glacialis--94. Pedicellaria forcepiforma, from the same--95. Cristatella mucedo; 96. Edge-view of statoblast; 97. early stage in development of same--98. Lophopus crystallinus--99. Plumatella repens with ova, on submerged stem--100. Tænia echinococcus--101. Hydatids from human liver--102. Bilharzia hæmatobia--103. Amphistoma conicum--104. Trichina spiralis from fleshy part of Hambrc’ pork--105. Trichina spiralis male, separated from muscle.--106, 107. Fasciola gigantea. PLATE V.--_Page_ 556. MOLLUSCA. _Fig._ 108. Velutina lævigata, portion of lingual membrane--109. Velutina lævigata, part of mandible--110. Hybocystis blennius, portion of palate--111. Sepia officinalis, portion of palate--112. Aplysia hybrida, part of mandible--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. Acmæa virginea, part of palate--118. Cymba olla, part of palate--119. Scapander ligniarius--120. Oneidoris bilamellata, part of palate--121. Testacella Maugei, part of palate--122. Pleurobranchus plumula, part of mandible--123. Turbo marmoratus, part of palate. Lingual membranes of Mollusca; drawings made from specimens in the collection formed by F. E. Edwards, Esq., now in the British Museum. Typical examples of the numerous forms of Odontophors met with in Gasteropod and Cephalopod Mollusca. PLATE VI.--_Page_ 582. INSECTA.