PLATE 21. 



Geodia mesotriaena Lendenfeld. 



jTjg 1. — var. pachana Lendenfeld. 

 Figs. 2-6.— var. megana Lendenfeld. 



l.-Dry specimen of var. pachana seen from above; reduced 1 : 0.67; phot. Zeiss, anastig. 480/ 



2.-Ra'<£l section of a spirit specimen of var. megana; reduced 1 :0.67; phot. Zeiss, anastig. 480/ 



"*';! hirsute part, where the projecting spicules have not been broken off; b, praeoseular cavity. 

 3-6.— Teloclades of var. megana; magnified 10; phot. Zeiss, planar 50: 



3, 5, orthotriaenes fully developed; 



4, young orthotriaene ; 

 6, mesoprotriaene. 



