1. The amoebocytes exhibit pinocytosis, extensive glycogen deposits, and lysosomes. The lysosomes have typical structural criteria, indicating enzymatic activities.

2. Amoeboid movement and agglutination in amoebocytes of limulus and the relation of these processes to tissue formation and thrombosis

3. Numerous echinochrome containing amoebocytes and agranulocytes are distributed in the connective tissue layer and the basal region of the pharyngeal inner epithelium.