LIST OF TEXT-FIGURES. 



1908, pp. 431-983. 



Page 



79. Diagram of the construction of the gas-gland rete mirabile . . 432 



80. Cells of the new gland situated round and in contact with 



a Tein _ 432 



81. Clathrina danvinii 430 



82. Clathrina darivinii, spicules . _ 436 



83. Clathrina contorta 437 



84. Clathrina contorta var. spinosa, spicules 438 



85. 86. Clathrina blanca 439 



87. Clathrina blanca, spicules . 44O 



88. Leucosolenia irregularis 44X 



89. Leucosolenia irregularis, skeleton of dei-mis 441 



90. Leucosolenia irregularis, spicules 442 



91. Sycon munitum, sp. n., spicules 443 



92. Leucandra ananas, spicules 445 



93. Grantessa simplex, sp. n 446 



94. Grantessa simplex, skeleton of body-wall , 447 



95. Grantessa simplex, skeleton of dermis 447 



96. Grantessa simplex, gastral skeleton 448 



97. Grantessa simplex, spicules 448 



98. Grantessa zanzibaris, sp. n 449 



99. Grantessa zanzibaris, skeleton of body-wall 45O 



100. Grantessa zanzibaris, skeleton of dermis 451 



101. Grantessa zanzibaris, gastral skeleton 45I 



102. Grantessa zanzibaris, spicules . 452 



103. Heteropegma nodus gordii, spicules 453 



] 04 A, Leucilla wasinensis, spicules 454 



104 B. Leucilla loasinensis, spicules 4,55 



