PLATE Il. 
page. 
Figs. 1, 2. Tethya? sp. Simple trifid ,zone‘ spicules 36 
fig. 3 Geodia >? sp. Compound trifid zone spicule 34 
fig. 4 Tethya? sp. Simple trifid zone spicule / 
Pig. 5 Tethya? sp. Simple trifid zone spicule : Bu 
Figs. 6, 7 Geodia> sp. Simple and compound trifid spicules. 34 
fig, § Tethya? sp. Simple trifid zone spicule 38 
Fig. 9 Geodia> sp, Compound trifid spicule 34 
Fig. ro Tethya? sp. Simple trifid zone spicule 37 
figs. 11, 12 Dermal spicules of Lithistids 62 
Figs. 13, 14 Tethya? sp. Simple trifid zone spicules. 36 
Fig. 15 Mermal spicule ‘of Muithistid: spange; | = ees eee 62 
figs. 16—23 Tisiphonia? sp. Compound trifid zone spicules. Figs. 17, 
18, 22 are lateral views showing variously elongated 
shafts; in Fig. 21 the termination of the shaft is rounded: 
Figs. 16, r9, 20, 23 show the Heads of different spicules . 43 
Figs. s24, 25° Pachastrellaysp: (@Quadrid ‘spicules’ . 4.4. 4 oe. ga eS 
Fig. 26 Cammnusr"sp. Three-rayed spieule. ... 0.9. i603 oie 
Lig. 27 Pachastrella? sp, Three \rayedspicule. . . 2... .-.-4 = Ee 
fig. 28 Pachastrella primoeva? Zittel. Five armed spicule. . . . . 46 
figs. 29— 31 Pachastrella Carteri, n. sp. Simple quadrifid spicules . . . 46 
Figs. 32— 33 Pachastrella primoeva? Zittel. Quadrifid spicules, arms une- 
qual Yand »sliohtly, bifurcated; /.., 9.0 8s eae Oe ee 
Lig. 34 Whessamesebive-amnedespiculerwi. arse) een 46 
All the figures are drawn by means of the Camera lucida and to the same 
scale of 20 diameters. 
