VI ILLUSTRATIONS. 



Commercial sponges and the sponge fisheries: Facing page. 



Plate XXVIII. Specimen of rock from sponge beds off Anclote Key, Florida 403 



XXIX (i) Diving boat, with cured catch. (2) Diving boat hauled out 446 



XXX. Rock Island sheepswool sponge 512 



XXXI. Same 512 



XXXII Florida Key sheepswool sponge 512 



XXXIII. Matecumbe Key sheepswool sponge 512 



XXXIV. Nassau sheepswool sponge, Bahama Islands 512 



XXXV. Abaco sheepswool sponge, Bahama Islands 512 



XXXVI. Cuba sheepswool sponge 512 



XXXVII. Florida Key yellow sponge 512 



XXXVIII. Same 512 



XXXIX. Same 512 



XL. Anclote yellow sponge 512 



XLI. Same 512 



XLII. Bahama yellow sponge 512 



XLIII. Same 512 



XLIV. Cuba yellow sponge 512 



XLV. Florida velvet sponge 512 



XL VI. Bahama velvet sponge 512 



XL V 1 1 . Cuba velvet sponge 512 



XLVIII. Anclote grass sponge 512 



XLIX. Florida Key grass sponge 512 



L. Same 512 



LI. Same 512 



LI I. Bahama grass sponges 512 



LIII. Cuba grass sponges 512 



LIV. Florida glove sponge 512 



LV. Cuba reef sponge 512 



LVI. Bahama reef sponges 512 



LVI I . Cuba hardhead sponges 512 



LVIII. Florida wire sponge 512 



LIX. Same 512 



LX. Turkey cup sponges, Mediterranean Sea 512 



LXI. (i) Turkey solid sponge, Mediterranean Sea. (2) Toilet sponge, Medi- 

 terranean Sea 512 



LXII. Toilet sponge, Mediterranean Sea 512 



LXIII. Philippine toilet sponges 512 



LXI V. Zimocca sponges, Mediterranean Sea 512 



LXV. Honeycomb sponge, Mediterranean Sea 512 



LXVI. Elephant-ear sponge, Mediterranean Sea 512 



A PRACTICAL METHOD OF SPONGE CULTURE: 



Plate LXVII. Sponges growing on cement triangles used in experimental plants of cut- 

 tings 547 



^ LXVIII. Cement disks with cuttings mounted, showing spindle and wire attach- 

 ments 566 



LXIX. (i) Sheepswool cutting about size recommended for planting. (2) Sheeps- 

 wool sponge about 11 months old, grown from cutting 586 



LXX. (i) Sheepswool sponge 20 months old, grown from cutting. (2) Yellow 



sponge 2 1 months old, grown from cutting 586 



LXXI. Sheepswool sponge 31 months old, grown from cutting 586 



LXXII. Sheepswool sponge 35 months old, grown from cutting 586 



LXXIII. Sheepswool sponge 52 months old, grown from cutting 586 



