PLATE 5. 
Calycosilva cantharellus LENDENFELD. 
Figs. 1, 2, 4, 5, 7-9, 11-15, 18-20 — var. helix Lendenfeld. 
Figs. 3, 6, 10 —var. (B) simplex Lendenfeld. 
Figs. 16, 17 —var. (A) simplex Lendenfeld. 
Fig. 21 —var. megonychia Lendenfeld. 
1.— Radial section through a part of the body near the margin, of var. helix; magnified 20; phot. Zeiss, 
planar 20 mm.: 
a, gastral pinule-fur; b, hypogastral oxypentactines; c, subgastral rhabd-bundles; d, choano- 
somal rhabds and oxyhexactines; e, subdermal rhabd-bundles; f, hypodermal oxypentac- 
tines; g, dermal pinule-fur. 
2.— The end of arhabd of var. helix; magnified 200; phot. Zeiss, apochr. 8, compens. oc. 6. 
3.— The skeleton of the basal end of var. simplex (B); magnified 6; phot. Zeiss, planar 50 mm.: 
a, fragment of a spicule, probably a root-spicule, of Hyalonema sp., to which the Calycosilva is 
attached; b, the basal part of the skeleton of the Calycosilva. 
4,— Radial section through part of the body of var. helix; magenta; magnified 20; phot. Zeiss, planar 
20 mm.: 
a, gastral pinule-fur; b, hypogastral oxypentactines; ec, subgastral rhabd-bundles; d, choano- 
somal rhabds and oxyhexactines; e, subdermal rhabd-bundles; f, hypodermal oxypentac- 
tines; g, dermal pinule-fur. 
5-7.— Parts of the basal skeleton-net; magnified 100; phot. Zeiss, apochr. 16, compens. oc. 6: 
5, 7, from the stalk of var. heliz; 
6, from the lattice-work which surrounds the spicule-fragment forming the base of attachment 
of var. simplex (B). 
8, 9.— The central part of two rhabds of var. heliz; magnified 200; phot. Zeiss, apochr. 8, compens. oc. 6: 
8, of a simple rhabd; 
9, of a centrotyle rhabd. 
10.— The sectioned face of var. simplex (B), longitudinally cut in two; magnified 1.7; phot. Zeiss, anastig. 
480/412 mm.: 
a, fragment of a spicule, probably a root-spicule, of a Hyalonema sp., to which the Calycosilva 
is attached; b, the Calycosilva. 
11.— Radial section through the margin of the body of var. helix; magnified 20; phot. Zeiss, planar 
20 mm.: 
a, gastral pinule-fur; g, dermal pinule-fur; h, margin. 
12-15.— Ends of rhabds of var. helix; magnified 200; phot. Zeiss, apochr. 8, compens. oc. 6: 
12, 13, the two ends of a nearly isoactine amphistrongyle rhabd; 
14, 15, the two ends of a tylostyle rhabd. 
16.— Axial, longitudinal section through the upper end of the stalk and the adjacent (central) part of 
the body of var. simplex (A); magnified 6; phot. Zeiss, planar 50 mm. : 
a, gastral pinule-fur; b, choanosome; e, stalk; g, dermal pinule-fur. 
17.— Onychhexaster of var. simplex (A); magnified 300; phot. Zeiss, apochr. 4, compens. oc. 6. 
18, 19.— Onychhexasters of var. helix; magnified 200; phot. Zeiss, apochr. 8, compens. oc. 6. 
20.— The central part of a diactine the two actines of which enclose nearly a right angle, of var. helix; 
magnified 100; phot. Zeiss, apochr. 16, compens. oc. 6. 
21.— The central part of a triactine of var. megonychia; magnified 200; phot. Zeiss. apochr. 8, compens. 
oc. 6. 
