138 LAWEENCE M. LAMBE ON SPONGES, ETC. 



Fig. 2.—Iotrochota magna (page 120). Natural size. 



Fig. 2a. Stylus ; X 272. 



Fig. 26. Slender stylus ; X 272. 



Fig. 2c. Amphiaster, side view ; X 176. 



Fig. 2d. Amphiaster, end view ; 476. 

 Fig. 3 — Myxilla Behri7igensis (page 121). Natural size. 



Figs. 3a, 36. Styli ; X 272. 



Fig. 3c. Tylote spicule ; X 272. 



Fig. 3d. Isochela ; X 272. 



Figs. 3e, 3/. Sigmata ; X 272. 

 Fig. i.— Myxilla firma (page 122). Natural size. 



Fig. 4a. Stylus ; X 272, 



Fig. 46. Strongylote spicule ; X 272. 



Fig. 4c. Isochela, front view ; X 272. 



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



Figs. 4e, if. Sigmata ; X 272. 

 Fig. h.—Phakellia Dalli (page 125). One-half natural size. 



Fig 5ft. Large stylus from the upper part of the sponge ; X 136. 



Fig. 56. Stylus ; X 272. 



Figs. 5c, M. Slender styli ; X 272. 

 Fig. G.—Sube)'ites montalbidus (page 127). Large tylostylus ; X 272. 



Fig. 6ff. Small tylostj lus ; X 272. 



Fig. 66. Spined o.xeote spicule ; X 272, 



Fig. 6c. Spined cylindrical spicule ; X 272. 



Plate IV. 



Fig. l.—C7c(<Ac(a iotcn i' (page 123). Stylus; X 272j 



Fig. la. Anisochela ; X 272. 

 Fig. ■L—A.vinella ruyosa (page 126). Oxeote spicnie ; X 136. 



Fig. -la. Stylus ; X 136. 



Fig. 26. Irregularly l)cnt oxeote spicule ; X 60. 

 Fig. '.i.Suberites subei-ea (page 126). Tylostylus with rounded end ; X 272. 



Figs. 3«, 36. Tylostyli ; X 272. 



Fig. 3c. Cortical tylostylus ; X 272. 



Fig. 3rf. " Inflatocylindrical flesh-spicules ; " X 272. 

 Fig. i.—Suberites monfiniger (page 128). Tylostylus; X 272. 

 Fig. ô.~Polymastia laganoides (page 129). Natural size. 



Fig. 5a. Large tylostylus ; X 136. 



Fig. 56. Dermal tylostylus ; X 136. 



Fig. 5c. Small tylostylus ; X 272. 

 Fig. 6. — Dcsnuicella pennata (page 129). Natural size. 



Fig. 6œ. Portion of skeleton, as seen in section at right angles to the surface, shewing the arrangement of 

 the spicules in the fibres ; X 60. 



Fig. 66. Large stylus ; X 272. 



Fig. 6c. Slender stylus ; X 272. 



Fig. 6d, Toxite ; X 272. 

 Fig. l.~E»perella serratohamala (page 130). Natural size. 



Fig. 7a. Tylostylus ; X 272. 



Figs. 76, 7c, Id. Sigmata with serrated ends ; X 272. 



Fig. 7c. Sigma without the serration at the ends ; X 272. 



Fig. If. Toxite ; X 272. 



Figs. Is, 7h. Toxa from the specimen having sigmata without serrated ends ; X 272. 



Fig. 11. Palmate anisochela, front view; X 272. 



Fig. 1 j. Palmate anisochela, side view ; X 272. 



