406 



On Shi Anemones and Mydroid Polyps 



nent, dull purple with two rows of white spots. Oral bands 

 numerous, flesh colour. 



Should it prove new, the specific name JSfitida would well ex- 

 press the sleek neat appearance for which it is remarkable. 



Fig. 6. 



Group of Hydrozoa from the Gulf of St. Lawrence, 



(a) Sertularia pumils. 

 (5) Tubularia 



(c) Laomedea diehotoasa. 



IT. — Hydroid Polyps collected at Gaspe, Metis, etc. 



The hydroid polyps are of much simpler structure than the 

 Actinic, each animal being little more than a gelatinous sac, fur- 

 nished with a circle or circles of tentacula. They constitute the 

 class Hydrozoa of Owen ; and by Agassiz and some other natu- 

 ralists are placed with the Acalephae, an arrangement which ex- 

 presses their close relationship to the Medusae or Jelly fishes; 

 The marine hydrozoa, though individually of simple structure, have 

 a remarkable tendency to multiply by a process of gemmation 

 or budding, the result of which is the formation of complex groups 

 of little horny cells, each having its animal occupant, and the 

 whole when dried resembling a small sea weed. In some of the 

 tribes, by a different kind of budding from that which merely in- 

 creases the polypary, locomotive individuals are produced, which 

 detachii g themselves from the parent, swim away in a form as 



