BY K. F. KALLMANN. 445 



Plate xix. 



Fig. 1. — Hemitedania anoiiyma Carter, from a specimen lal)elled as the 



type of Halichondria rubra Lendeiifeld; ( x ^). 

 F"'ig.2. — Hemitedania anonyma', from a macerated, coarse-fibred specimen; 



Figs.3, 4, 5. — Hemitedania anonyma; illustrating various forms assumed 

 by examples of this species; ( x h approximately). 



Plate XX. 



Fig. 1. — C/ia/ma ^mVma Whitelegge (non Schmidt); an incomplete speci- 

 men. 



Y\g.2. — Phlceodictyon ramsayi, from one of the co-types of Rhizochalina 

 7'amsayi Lendenfeld; illustrating a specimen of irregular shape pro- 

 vided with many root-like processes. 



Fiir.3. — Phlceodictyon ramsayi var. pyri/ormis (va,r.uov.) ; portion of the 

 upper surface showing the sieve-like area formed by the closely 

 apposed oscula; ( x |) 



Figs. 4-5. — Phlceodictyon ramsayi \ tangential sections close beneath the 

 surface, showing the pattern of the reticulation formed by fibres of 

 the bast-layer in the wall of the fistula and in between the fistulas 

 respectively; ( x 10). 



Plate xxi. 



Figs.l, 2, 3,4. — Stylotella agminata Ridley, from type-specimens of Stylo- 

 tella digitata Lendenfeld, and of Tedania laxa Lendenfeld; ( x^ ap- 

 proximateh'). 



Y^g-^.— Stylotella agminata Ridlej'; further illustrating the variable habit 

 of the species. 



Plate xxii. 



Fig.L — Axinella aurantiaca Lendenfeld; longitudinal median section taken 

 at the extremity of a thin branch; ( x 15). 



Fig.2. — Stylotella agminata Ridley; longitudinal section taken at the ex- 

 tremity of a branch; ( x 12). 



Fig.3. — Histoderma actinioides, sp.nov.; ( x f approximately). 



Fig. 4. — Phlaodictyon ramsayi Lendenfeld, var. 'pyri/ormin {wa,v.uo\'.) ; 

 inner surface of longitudinally bisected specimen, showing disposi- 

 tion of oscular canals; ( x f ). 



Fig.6. — Spirastrellail) ramulosa Lendenfeld; showing the skeleton which 

 remains after maceration by means of caustic potash; ( x |). 



Fig.6. — RaspaiAa tenella Lendenfeld; longitudinal median section taken 

 at the extremity of a branch; ( x 12). 



Fig. 7. — Raspailia gracilis Lendenfeld; longitudinal section of a branch; 

 (x9). 



