ILLUSTRATIONS IN THE TEXT. 



FIGS. PAGE 



88. Polyclinum aurantium : a system . . .3 



89. branchial aperture . 4 



90. Amaroticium proliferum : a colony . . 8 



91. branchial apertures . 9 



92. A. argus : a colony . . . . .12 



93. ,, an individual . . . .13 



94. A. Nordmanni : systems . . . .15 



95. branchial aperture . . 16 



96. A. fallax : a group and an individual . . 18 



97. Aplidium ficus : a colony . . . .24 



98. ,, part of a colony and an individual 25 



99. ? two colonies . . .26 



100. ^4. nutans : a group and an individual . . 28 



101. Didemnum gelatinosum : a colony . . .33 



102. development ; two stages 33 



103. part of a colony . . 34 



104. D. candidum : colonies . . . .36 



105. ., individuals . . . .37 



106. Distoma rubrum : a colony . . . .39 



107.- individuals . . .40 



108. D. variolosum : a colon v and an individual . 42 



/ 



109. Leptoclinum asperum : part of a colony . . 45 



110. L. fulgens : part of a colony . . .47 



111. L. gelatinosum : part of a colony . . .49 



112. L. Lister ianum : a colony . . .51 



113. ,, part of the same . . .51 



114. Botryllidfe : structure . . . .52 



115.- . 53 



116. B. Schlosseri : an individual . . .56 



117. earliest figure of a colony . . 57 



