SPONGES FROM TKR WRSTRRN COAST OF NORTH AMERICA. 137 



EXPLANATION OF TLATES. 

 Plate II. 



Fig. 1. — Petrosia hispida (page 115). Oxeote spicule ; X 272. 

 Fig. 2.—Toxochalina borealis (page 115). Natural size. 

 Fig. 2a. Oxeote spicule ; X 272. 

 Figs. 26-?. Toxa ; X 272. 

 Fig. S.—Tedania fragilis (page 116). Stylus ; X 272. 

 Fig. Set. Tylote spicule : X 272. 

 Fig. 3&. End o£ same more highly magnified. 

 Fig. 3c. Rhaphide ; X 272. 

 Fig. i.—Esperella helios (page 117). Stylus ; X 272. 



Fig. ia. Palmate anisochela, front view ; X 272. 

 Fig. ib. Palmate anisochela, side view ; X 272. 

 Fig. ic. Simple sigma ; X 272. 

 Fig. o.—Espcrella adhœrcns (page 117). Stylus; X 272. 

 Fig. .5a. Palmate anisochela, front view ; X 272. 

 Fig. .56. Palmate anisochela, side view ; X 272. 

 Fig. 5c. Small palmate anisochela, front view ; X 272. 

 Fig. 5rf. Simple sigma; X 272. 

 Fig. 5e. Rhaphides, in bundle ; X 272, 

 Fig. 5/. Rhaphides, loose ; X 272. 

 Fig. ii.—Enpcriopsis Qiiatslnoeiisis (page 118). Palmate isochela, front view ; X 272. 



Fig. 6a. Palmate isochela, side view ; X 272. 

 Fig. l.—Clwndrodadia Alaskcnsis (page 119). Natural size. 

 Fig. la. Large stylus : X 272. 

 Fig. 76. Small stylus ; X 272. 

 Fig. 7c. Isochela, front view ; X 272. 

 Fig. Id. Isochela, side view ; X 272. 

 Fig. le. Small isochela, side view ; X 272. 

 Fig. 8.~C/iondrocladia pulchra (page 119). Natural size. 

 Fig. 8(1. Large stylus ; X 136. 

 Fig. 86. Small stylus ; X 136. 

 Fig. Sc. Iso.-hela ; X 272. 

 Fig. M-. Simple sigma ; X 272. 

 Fig. H.—Mi/.iilla Barentsi (page 121). Spined stylus ; X 272. 

 î'ig. 9a. Tornate spicule ; X 272. 

 Fig. 96. Isochela ; X 272. 

 Fig. 9f. Simple sigma ; X 272. 

 Fig. W.—My.riUa Amaknakensis (page 122). Natural size. 

 Fig. lOo. Spined stylus ; X 272. 

 Figs. 106, lUc. Spined tornota ; X 272. 

 Fig, lOd. Isochela, front view ; X 272. 

 Fig. lOe. Isochela, side view ; X 272. 

 Fig. \l.~Ploca)nia Manna)rnsis{pt\i^e 121). Dumb-bell-shaped (tylote) spicule ; X 272. 

 Fig. 11a. Large stylus ; X 136. 

 Fig. 116. Tylostylus ; X 272. 

 Fig. lie. Slender tylostylus ; X 272. 

 Fig, lid. Palmate isochela, front view ; X 272. 

 Fig. lie. Palmate isochela, side view ; X 272. 

 Figs. 11/, llg. Toxa ; X 272. 

 Fig. 12. — Suberites concinnus (page 128). Natural size. 

 Fig. 12a. Stylus ; X 272. 



Plate III. 



Fig. 1.— Esperella modesfa {page 118). Stout stylus ; X 272. 

 Fig. la. Slender stylus ; X 272. 

 Figs. 16, Ic. IsocheltC, front view ; X '/72. 

 Fig. Id. Isochela, side view ; X 272. 



Sec. IV., 1894. 18. 



