PLATE XIII. 



Fig. i. Placogorgia staderi n. sp. Natural size. ia, part of branch x 5- 



Fig. 2. Placogorgia alter nata n. sp. Natural size. 2a, part of branch X 5. 



Fig- 3- Villogorgia serrata n. sp. Natural size. $a, part of branch X 5. 



Fig. 4. Placogorgia bebrycoides n. sp. Natural size. 4a, part of branch X 5. 



