136 THE ROYAL SOCIETY OF CANADA 



that in the species no free medusae were produced. He goes further 

 than this and makes a new genus for the species because he found 

 that the egg-cells were developed outside the sporosacs, in the 

 stem or stolon and only after the sporosacs became larger did 

 they wander in. This is his chief reason for creating the new genus 

 Obelaria, although the nature of the growth of the fascicled stem 

 appears to have some weight with him also. As far as this latter 

 is concerned, we have a great variety of simple and fascicled stems 

 in many other genera and there seems no particular reason why they 

 should not occur here. As far as the development of the egg-cells 

 is concerned, I have seen nothing to indicate that the development 

 of the egg-cell, as to whether it takes place external to or within 

 the sporosac, has been worked out in very many of the species that we 

 now place in the genus Campanularia. Unless the whole genus 

 is revised on that basis, it is quite probable that a greater anomaly 

 will exist by singling this species out to make a new genus than if it 

 were allowed to remain with the genus Campanularia, which will 

 include all the campanularian species in which the planulas are pro- 

 duced from ova in the sporosacs while these remain in the gonangia. 



Agassiz' description of Laomedea pacifica is too meagre to base 

 any definite conclusion upon. Torrey's description of what is prob- 

 ably the same Laomedea pacifica is quite complete. As he found 

 sporosacs in the gonangium he evidently concluded that it could not 

 be the same species that Hincks described as Obelia gelatinosa and 

 hence he named it Campanularia pacifica. In my former paper I stated 

 the same conclusion. Calkins found the species at Discovery Bay 

 but as he did not find the gonosome, he did not have any compunction 

 against naming it Obelia gelatinosa. I am now fully convinced that 

 all the material collected along the coast and reported as either Obelia 

 gelatinosa or Campanularia pacifica belongs to the one species which 

 I have here described as Campanularia gelatinosa. 



The specimens reported from San Juan Archipelago as Obelia 

 corona were probably young specimens of Campanularia gelatinosa. 



Campanularia grœnlandica Levinsen 



PI. XI, Fig. 30 

 Campanularia grœnlandica Levinsen, Meduser, Ctenophorer og 



Hydroider, 1893, p. 26. 

 Campanularia lineata Nutting, Hyd. from Alaska and Puget Sound, 



1899, p. 744. 

 Campanularia grœnlandica Fraser, West Coast Hydroids, 1911, p. 31. 



Trophosome. — Stem unbranched forming the hydranth pedicel. 



