Plate XIII. 



Page 

 Fig. i. Cladorhiza oxeata n. sp. a — b oxea, a from the axis, b from the tissue and the branchlets, 

 x 1 20, c anisancora unguifera, front view and side view, x 1000, d sigmata of the 

 large form, c a developmental form,/ sigmata of the small form, x 460 97 



2. Chondrocladia eigantea Arm. Hans, a— b stvli, a from the axes, b from the tissue, x 



& '& 



//) 



c styli from the stalk-coating, x 340, d fragment of a stylus from the stalk-coating, 

 showing the fine spinulation, x 1000, e isancora unguifera of the large form, side view 

 and front view, the latter seen a little from the lower end, x 585, / ancorse of the 

 small form, one with six, the other with eight teeth; the former in side view a little 

 from the front, the ake are not seen; the latter in half front view, not all the teeth are 

 to be seen, x 1000, g ancora of the small form with seven teeth, side view, x 585, 

 // ancorae of the small form with eight and with seven teeth, from the end, x 1000, 

 i sigmata, x 460, k ancora of the large form, from embryo, a little contort, so that the 

 lower end shows four teeth, / ancora of the transitional size, from embryo, x 585 .... 102 



— 3. Artemisina arcigera O. Schmidt, a—b subtylostyli, a from the main skeleton, b from the 



dermal skeleton, x 165, c isochela palmata, front view and side view, x 1400, d toxa 

 of different sizes, c developmental form of a large and a small toxon, x 255, / end of 

 a large and a small toxon, x 1000 • • • ■ no 



— 4. Artemisina apolliiiis R. and D. a—b styli, a from the main skeleton, b from the dermal 



skeleton, x 165, c head-end of a dermal stylus, d head-end of a skeletal stylus, x 700, 

 r isochela palmata, front view and side view, x 1400, f toxa of both forms, x 255, 

 g the middle part and the end of a toxon, thickened by abnorm apposition of silicium, 

 x 255 114 



— 5. Hom&odictya flabclliformis Ann. Hans, a— b oxea, a from the skeleton, b from the dermal 



membrane, x 165, c isochela arcuata of common form, side view and front view, d iso- 

 chela arcuata of strongly curved form, side view and front view, e a younger and an 

 older developmental form, x 700 1 18 



6. Homceodictya palmata Johnst. a oxea, x 165, b isochela palmata, front view and side view, 

 c an older and a younger developmental form, the latter only consisting of the axis, 



X IOOO J 2I 



