676 EXPLiNATION OP THE PLATES. 



Fig. p. Eehinodietyum ghmsratum, spioules, X 190. From type 

 specimen from Thursday Island. 



9. E. cancellatum, spicules, xl90. From specimen figured 

 f 1. XL. fig. D. 



r. E. costiferum, spicules, x 190. From specimen from Port 

 MoUe. 



s. LeueopMoms fenestratus, part .of vertical section from type 

 specimen, x 38. 



t. Amphilectus tibiellifer, skeleton aeuate and tibella and 

 tricurvate acerate spicules, x 190. i', head of tibiella, 

 and t", equianohorate as seen from front and side, x 370. 

 From type specimen from Torres Straits. 



Plate XLIII. 



Fig. a. Axinella echidncBa. Spicules, x 68. From dry specimen 

 from Thursday Island. 

 6. Oeodia glohostellifera, globostellate, external and internal 

 stellate spicules, in tissue below dermal crust, x 370. 5'. 

 Portion of cortex, showing crust of balls covered by mem- 

 brane containing smaller stellates, and tuft of surface 

 acerate spicules projecting from it, x 68. 



c. Spirastrella deeumbens. Spicules, xl90. From type 



specimen from Alert Island. 



d. S. congenera, skeletal spinulate spicules, showing two forms 



of head, xl90. d'. Flesh-spicules, x370. From type 

 specimen from Thursday Island. 



e. S. vagabunda, skeletal spinulate spicule, x 190. «'. Flesh- 



spicules, X 370. From specimen from Torres Straits. 



/, Hymeniaeidon agminata, spicules, X 190. /.' Head of spinu- 

 late spicules, X 370. From type specimen fromPort Jackson. 



g, LeucopUoews fenestratus, var. Spicule, x 68. 



h. Suberites epipJiytum, vertical section, x 68. Ti', spicule 

 x68; h", head of spicule, chief forms, x370. From 

 spirit-specimen from Port Curtis. 



