AKD  PHYSIOLOGY  OP  THE  SPONGIADiE. 
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Boweebank,  ms.,  cracked  by  the  application  of  cold  water  while  in  a heated 
state,  x90hnear:  page  284. 
Spicula  of  the  Skeleton. 
Fig.  9«.  Aceeate,  from  Halichondria panicea.,  Johnston,  x160  linear:  page  286. 
Fig.  9 5.  Aceeate,  from  Spongilla flumatilis.,  Johnston,  x160  linear:  page  286. 
Fig.  10.  Fusieoemi-aceeate,  from  Halichondria  coccinea.,  Boweebane,  MS.,  X 160  linear : 
page  286. 
Fig.  11.  Inflato-fusifoemi-aceeate, Boweebane,  MS.,  x 160  linear: 
page  286. 
Fig.  12  a.  Acuate,  from  Halichondria  Alderi,  Boweebane,  MS.,  X 160  linear : page  286. 
Fig.  12  5.  Acuate,  from  Halichondria  canmcula,  Boweebane,  MS.,  xl60  linear: 
page  286. 
Fig.  13.  Fusifoemi-acuate,  from  Boweebane, MS.,  x 160 linear: 
page  286. 
Fig.  14.  Attenuato-acuate,  from  Halichondria  infimdibuliformis,  Johnston,  x160 
linear:  page  286. 
Fig.  15.  Flecto-attenuato-acuate,  from  Halichondria  infimdibuliformis,  Johnston, 
Xl60  linear:  page  286. 
Fig.  16.  Flecto-attenuato-acuate,  from  Halichondria  variantia,  Boweebane,  MS., 
Xl60  linear:  page  286. 
Fig.  17.  Cylindeical,  from  Pachymatisma  Johnstonia,  Boweebane,  x90  linear:  page 
287. 
Fig.  18.  Fusifoemi-ctlindeical,  from  Pachymatisma  Johnstonia,  Boweebane,  x 90 
linear:  page  287. 
Fig.  19.  Attenuato-ctlindeical,  fr’om  Pachymatisma  Johnstonia,  Boweebane,  x90 
linear:  page  287. 
Fig.  20.  Fusifoemi-attenuato-cylindeical,  from  Tethea  robusta,  Boweebane,  MS.,  x90 
linear:  page  287. 
Fig.  21.  Biclavated  cylindeical,  from  a new  Australian  sponge,  X 260  linear : page 
287. 
Fig.  22.  Inequi-biclavated  cylindeical,  from  Pachymatisma  Johnstonia,  Boweebane, 
X 90  linear : page  287. 
Fig.  23.  Angulated  inequi-biclavated  cylindeical,  from  Pachymatisma  Johnstonia, 
Boweebane,  x90  linear:  page  287. 
Fig.  24.  Spinulate,  from  Halichondria  carnosa,  Johnston,  x260  linear:  page  287. 
Fig.  25.  Fusifoemi-spinulate,  from  Halichondria  suberea,  Johnston,  x260  linear: 
page  287. 
Fig.  26.  Attenuato-depeesso-spinulate,  from  an  undescribed  species  of  sponge,  xl60 
linear:  page  287. 
Fig.  27.  Enoemi-spinulate,  from Johnston,  x 260  linear:  page  287. 
