Figs. 34—36 Four-rayed anchoring spicules of Hexactinellid sponge. 
Pf 
PLATE 7 
Geodia and allied Genera. Different forms of acerate spi- 
cules, 2%9 Mo Siete! Lees kis er Se 
Geodia clavata, n. sp. Shaft, probably of trifid  spicule 
showing very wide interior canal, 2° 
Scolioraphis? sp. 2° 5 
Dh ie ac sp. Different foputs af niged soiree: an 
Acuate spicules of Monactinellids. 29 
Reniera, sp. Cylindrical curved spicules. 49 ae 
Reniera, sp. Conical spicules, with smooth outer surface 
and interior canal. 2° 3 ene > Ye 
Geodia and allied Genera. Small acerate spicules. ?/ 
Reniera sp. Spined spicule. §&? aS 
Stelletta? sp. Siliceous disc showing canals. &° 
Stelletta? sp. Siliceous disc with scalloped border. & 
Geodia and allied Genera. Siliceous globule. °° 
The same. Globostellate spicules, Re ee ae: 
Stelletta? sp. Siliceous disc, imperfect at the edges; showing 
the canals. 6° : Sales see 
Probably deci pipnle oe Lithistid sponge. Fig. 30 shows 
the shaft. 49 iat iene sNdes HON 
Four-armed suchas! spicules of Mexacdactiid sponge. 6? 
Anchoring spicule of Hexactinellid with six rays. °? 
60 
1 
All the figures are drawn by means of the Camera lucida. 
page. 
27 
29 
40 
62 
72 
72 
We 
