30 MR. TEMPLETON ON SOME INVERTEBRATED ANIMALS. 
15—18. PiraTESA NIGRO-ANNULATA. 
Fig. 15. Represents the animal of the natural size. 
16. Gives a magnified view of the animal. 
17. Part of one of the tentacula, exhibiting the form and size of the cilia. 
18. The tip of a foot with its spines. 
