562 DR. R. VON LENDENFELD ON THE SYSTEMATIC [DcC. 21, 



B. Flesh-Spicules (Microsclera). 



6, Toxius. 



Curved in the centre, the two ends in a straight line, thus .^-^ (e. g. 

 Toxochalina).-= ^, Vosmaer. When in bundles, Toxodragmata. 



7. Sigmata. 



S-shaped, curbed irregularly, not expanded in one plane {e. g. Gel' 

 liodes).= </», Vosmaer. When in bundles, Sigmadragmata, 



S. Isochelce. 

 Curved spicules with flat expanded ends extending in the surface of 

 a rotation ellipsoid ; both ends equal {e.g. Desmacidonidce). =an&', 

 Vosmaer. Anchorates, auctorum. 



9. Anisochelce. 



Curved spicules with flat expanded ends extending in the surface 

 of a rotation ellipsoid ; ends unequal (e.g. DesmacidonidcB). =anc, 

 anc, Vosmaer. Anchorates, auctorum. 



10. Diankistra. 



A rod with a hook at each end, divided by a remarkable incision 

 (e. g. Fomerula) . = .r^^ Vosmaer. Bundles of hair- like spicules, 

 Trichodragm at a. 



3. Triaxonia. 

 Spicules with three axes and six rays and their derivatives. (For 

 details compare F. E. Schulze's preliminary report.) 



1. Oxyhexact. 



With six pointed rays, the ends of which form the corners of a 

 double square pyramid. The rays represent the crystalline axes. 



2. Oxypentact. 



One ray rudimentary, representing the axes of a simple square 

 pyramid. 



3. Oxy tetrad. 



Two rays rudimentary, representing the edges of a square pyramid. 



4. Oxydiact. 



Four rays rudimentary, only two rays lying in one straight line 

 remain. 



5. Hexaster. 



A star with six, generally equal rays : — 



a. Oxyhexaster. Rays pointed. 



b. Discohexaster. Rays terminated by disks. 



c. Floricome. Rays terminated by a bunch of curved branches. 

 i^. Graphiohexaster, Rays much curved. 



Plumicome. Rays terminated with a number of plumose 

 branches. 



6. JPinnulce. ' 



A star with five or six rays. One of them is particularly highly 



