1905. | SPONGE CLATHRINA CONTORTA. 13 
Text-fig. 4. 
62 
Spicules of the “ spinosa” varicty of Clathrina contorta. 
Figg. 4a-4f. Spicules of Bowerbank’s type of Leucosolenia contorta in the British 
Museum (Bowerbank Coll. 988), showing gastral rays with tendency to irregular 
curvature.—Figg. 5 a-5 h. Spicules of a specimen in Canon Norman’s collection 
labelled “ Ascetta spinosa” in Lendenfeld’s handwriting ; the elongated gastral 
rays (5f-5h) are broken off.—Figg. 6 a-6g. Spicules of a specimen from 
Banyuls. 
