PLATE VII. 



FIG. la-k. Aulorossella longstaffi. Spicules. (Page 19.) 



FIG. la. One end of larj_ r e parenchyma! diactin. (x 50.) 



Km. Ib, lb l . Pyramidal parenchyrnal tetractin. (x .Mi.) 



FIG. Ic. Autoderaal pentactin. (X ICO.) 



Fin. Irf, Id 1 , Id 2 , Id 3 . Hypodermal peutactins. (x 5o.) 



PlG. If.- -Autogasfcral hexactin. ( x 1 Co. ) 



FIG. If.- -Holoxyhexaster. (x L'4".i 



FIG. I/ 1 . Hemioxyhexaster. (x -J40.) 



FIG. I/ 2 . Monoxyhexaster. (x 240.) 



FIG. Ig. Calycocome. (Optic, sect.) (x -'to.) 



FIG. I// 1 . Part of same. ( x 700.) 



FIG. 1A. Monodiscohexaster. (x 700.) 



FIG. I/". Microdiscohexaster. (Optic, sect.) (x7oo.) 



FIG. 2-20 1 . Anoxycalyj- i/in/iu'. (Page 2a.) 



FIG. 2. Section of bud. ( x 3d.) 



FIG. 2a. Parenchymal triactin. (x 50.) 



FK;. 2b. Autodermal stauractin. (x 160.) 



FIG. 2& 1 . Autodennal pentactin. (x 160.) 



Fin. L'/<-. Autodermal tauactin. (x H'.o.) 



FIG. 24 3 . An todermal angular diactin. ix ico., 



FIG. 26 4 . Modified autodermal stauractin. (X ICd.) 



FIG. 2c. Hypodermal pentactin. (x .">i>.i 



FIG. 2d. Autogastral hexactin. ( x 160.) 



FIG. LV. (imiihiocome. (Optic, sect.) (x.'4o. 



FIG. -(e 1 . -A part of same, (x 700.) 



FIG. -if. Strobilocoine. (Optic, sect.) (xi'4d.i 



FlG. 2/' 1 . A part of same. ( X 700.) 



FIG. ><!. Microdiscoliexastcr. (< >ptic. sect.) (X i'40.) 



FIG. -2if. The same, (x 700.) 



