GLOSSARY. 83 



Nematophore. The word signifies 

 " thread-carrier," in allusion to the threads, 

 or tubes of the darts with which the 

 nematophores are often associated. They are 

 peculiar amoeba-like bodies (sometimes called 

 " guard-polypites "), and are found associated 

 with polypites, and also on the stem and 

 branches in the Plumulariidse. 



Planule. The larval form into which 

 the egg, after segmentation, develops, prior 

 to its transformation into the polypite. 



Reproductive bud. Special egg, or 

 seed-bearing buds. 



"Select" polypite. Certain of the 

 alimentary polypites told off* to bear the 

 special reproductive egg-producing buds, and 

 which are generally more or less modified in 

 consequence. 



Thecaphora. The word means 



" sheath -bearer," and is applied to the Higher 

 Division of the Hydroida, in which the 

 polypites are provided with a horny 

 receptacle. 



