1905.] 



SPONGE CLATHRINA CONTORTA. 



Text-fig. 3. 



Spicules of two specimens of Clathrina contoHa from Banyuls. 

 Figg. 2 * & 6, thick quadviradiates ; ^c &, d, slender quadriradiates ; 2 e & /, 

 triradiates ; 2 g, quadriradUte showing gastral ray iu profile ; 2 A, a monaxon. 

 3 « & J, quadriradiates of another specimen ; 3 c-3 h, monaxons. 



