PLATE XXX. 



Fig. I. Ckone teres sp. nov., p. 215. Two views of the type, X 2. 



2. Serpula sflendens sp. nov., p. 230. Lateral view of a specimen, showing 



a portion of the tube covered with tubes of Spirorbis and Hyalopo- 

 matopsis^ X 2. 



3. Opposite view of another specimen, X 2. 



4. Sptrorbz's asperatus sp. nov., p. 245. Mass of tubes of the variety with 



roughened surface, attached to a gastropod shell, X about 6. 



