INDEX 
Sponging 52 
 Vesselol 
Stelospongos, Color of 50 
‘¢ maynardi 44 
Structure of Horny Sponges 10 
Tuba vaginalis 67 
Terpios 67 
Tube Sponge 10, 45, 49 
Abortive growth of 37 
‘« twigs of 37 
Closing membrane of 21 
Color of 43 
Water system of 13 
Variation in skeleton growth 82 
Venus Flower Basket 60 
Verongia 10 
Color of 49 
Violet Sponge 43 
Color of 50 
Odor of 48 
Water Glass 51 
Water System of Horny Sponges 11 
66 66 
ve -Finger Gen 64 
«6 ‘** «* Spiculigenous Sponges 63 
129 
