1905.] 



SPONOE CLATHRINA CONTOKTA. 



Text-fie-. 4. 



13 



Spicules of tlie " sjoinosa" variety of Clathrma contorta. 



Figg. 4a-4y. Spicules of Bovverbaiik's type oi Leucosolenia contorta in the British 

 Museum (Bowerbank Coll. 988), showing gastral rays with tendency to irregular 

 curvature. — Figg. 5 rt-5 h. Spicules of a specimen in Canon Norman's collection 

 labelled " Aseetta spinosa" in Lendenfeld's handwriting; the elongated gastral 

 rays {5f-5h) are broken off. — Figg. Ga-6ff. Spicules of a specimen from 

 Banyuls. 



