[lambe] sponges from THE ATLANTIC COAST OF CANADA 209 



EXPLAîsTATION^ OF PLATES. 



Plate I. 



-Eumastia sitiens (page 181). Natural size. 



-Chalina oculata (page 186). One-half the natural size. 



Fig. 2a. Oxeote spicule ; x 272. 

 -Gellius arcofenis (page 186.) Oxeote spicule ; x 136. 



Fig. 3o. Simple sigma ; x 272. 



Fig. 36. Toxite ; x 272. 

 -Gellius flagellifer (page 187). Natural size. 



Fig. 4ff. Oxeote .-picule ; x 272. 



Figs. Ah, 4r, Ad. Sigmata ; x 272. 

 -Desmacella Peachii var. Gra'nlandica (page 188). Natural size. 



Fig. 5fr. Stylus ; x 136. 



Figs. 5?>, J5r. Large sigmata ; x 272. 



Fig. 5f?. Small sigma ; x 272. 



Fig. oe. One of the rhaphides ; x 272. 

 Fig. Q.—Esperella lingua {\i&s:,G 1S8). Tylostylus ; x 1.36. 



Fig. 6o. Tylostylus, from another specimen ; x 136. 



Figs. 66, 6c. Anisochehï> ; x 272. 



Figs. 6rf, Qe. Sigmata ; x 272. 



Fig. 6/. Trichodragmata ; x 272. 

 Fig. l.—Esperella modest a (page 190). Natural size. 



Fig. la. Stout stylus ; x 272. 



Fig. lb. Slender stylus ; x 272. 



Figs. Ic, Id. Anisochela^ ; x 272. 

 Fig. 8.—Cladorhiza ahyssicola (page 190). Natural size. 



Fig. 8a. Stylus ; x 136. 



Fig. 86. Anisochela, front view ; x 272. 



Fig. 8f. Anisochela, side view ; x 272. 



Fig. 8f7. Large simple sigma ; x 272. 



Fig. 8^. Small contort sigma ; x 272. 

 Fig. y.~Cladorhiza NordenskioldiUpage 191). Natural size. 



Fig. 9a. Stylus ; x 136. 



Fig. 9b. Spined tylostylus ; x 272. 



Figs. 9c, 9d. Anisochehe ; x 272. 



Figs. 9c, 9/. Sigmata ; x 272. 

 Fig. 10.— Myxilla incrusfans (page 193). Spined stylus ; x 272. 



Fig. 10a. Tornote spicule ; x 272. 



Fig. 106. Isochela ; x 272, 



Figs. 10c, lOrf. Sigmata ; x 272. 

 Fig. U.—Sti/locordyla boi-ealis (page 202). Natural size. 



Fig. llo. Oxeote spicule of the stalk ; x 60. 



Fig. 116. Central portion of the same, showing the inflation ; x 272. 



Fig. lie. Cortical oxeote spicule of the stalk ; x 272. 



Fig. l\d. Oxeote spicule from a radiating fibre of the head ; x 136. 

 -Fig. lie. Portion of the same, showing the inflation at mid-length. 



Fig, \lf. Large cortical oxeote spicule of the head ; x 272. 



