294 AKT. 7. 1. IJIMA : HEXACTINELLIDA, IV. 



Deniialia, rough ])eiitactiiis ; sometimes stauractins. ^Nlicrodisco- 

 liexaster, S2)lierical ; under 50 /^ dia. 



C. mcf/ri'f tidn'i'osci I.j. — Sponge-body with a number of 

 variously sized, irregularly rounded, tubercle-like prominences 

 on the outside. Spiculation as in the typical C. iiieyeri. 

 Uiactins may have a large part in the formation of hy[)odermal 

 l)eams. 



C. tmifi'ri i'K(fos(( Ij, — 8ponge-body with (piite uneven sur- 

 face, due to numerous wriidde-like ridges and irregular ])romi- 

 nences on the outside. Hpiculation as in 0. iiieycri iabcrusa, but 

 the parencliymalia lacking in hexactinic elements. 



C jtacJii/arfiita Ij. — Sponge-body shaped somewhat as in 

 C. meyeri niyom ; of rather compact texture ; with small and 

 scanty incurrent canals. Parencliymalia exclusively diactins, of 

 which the principalia are comparatively large and strong. Hy- 

 })odermal oxypentactins with strikingly strong lays, which may 

 be h mm. thick at base with a length of 2 i mm. Dermalia, 

 rough [)entactins. Hexasters as in C. riieyeri. 



C. ((prruijatn Ij. — Sponge-body of corrugated apjK'arance, 

 thie to })it-like or irregular groove-like depressions of the ex- 

 ternal surface. Many of the pit-like depressions lead into a 

 system of anastomosing intercanals : some of these, extending (piite 

 through the sponge at the junction of l)ody with stalk, may give 

 to the latter the appearance of being Ijranched at its upper end. 

 Parenchymalia of diactins only, most of which are tliin and 

 small. llyjHjdermalia, pentactins with occasional diactins. Der- 



