GLOSSOLOGY. 



TERMS APPLICABLE TO CERTAIN CONDITIONS OF THE HYDROSOMA — 

 NAMES OF LEADING SYSTEMATIC GROUPS. 



Gymnoblastic (-yujiivoc, naked ; ftXdarri, bud). The condition of a hydroid when no external 

 protective receptacle (liydrotheca or gonangium) invests either nutritive or generative buds. 

 Gtmnoblastea, the name of one of the sub-orders of Hydrotda. (Diagram I, and the various 

 plates illustrating the present Monograph.) 



Calyptoblastic ((coAutttoc, covered; ^Xaart,, bud). The condition of a hydroid when an 

 external protective receptacle (hydrotheca or gonangium) invests either the nutritive or generative 

 buds. Calyptoblastea, the name of one of the sub-orders of Hydroida. (Diagram II, and 

 fig. 2, page 23.) 



Eleutheroblastic {iXivOipoe, free; /BAauDj, bud). The condition of a hydroid when the 

 nutritive buds, instead of remaining permanently attached, become free and enjoy an independent 

 existence. Eleutheroblastea, the name of one of the sub-orders of Hydroida. 



MoNOPSEA ((uo'i'oc, single; o'l^ic, appearance). The name of one of the sub-orders of the 

 Hydroida, in which development from the egg takes place without the intervention of a hydri- 

 form trophosome. 



Rhabdophora {pufiSoQ, rod ; fop^w, I bear). The name of one of the sub-orders of the 

 Hydroida. It corresponds to the extinct group of the GraptoUtes, in which a soHd rod is 

 developed in the walls of the chitinous perisarc. 



