146 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



Fig. 3. Bow-cell, showing filamentous processes. Fresh, 

 X 480. 



Fig. 4. Bow-cell, the processes of which are playing with 

 one of the haemoglobinous corpuscles. The 

 latter shows the usual chitinous body within it, 

 with concentric markings. Fresh, X 480. 



Fig. 5. Diagram of one of the rod-corpuscles of Ophelia 

 radiata. 



Fig. 6. Diagram of one of the ciliated-pots of Sipuncitlus 

 nudus. 



Fig. 7. Figure-of-8-shaped concretion with nucleated en- 

 velope, from coelomic fluid of Trophonia plumosa. 

 Hsemalum; the nuclei and central line were 

 stained. X 480. 





