NOTES OX PLYMOUTH HYDROIDS. 3 



Campanularia negi-ecta Alder. This very minute Cam- 

 panularian was found growing on the stems of Tubularia 

 indivisa. There were several gonangia present, but the 

 acrocysts were not developed. So far as I can ascertain, C\ 

 neg-Jecta has not been reported from Plymouth by previous 

 observers, probably having been overlooked on account of 

 its small size. It is only occasionally that the bimucronate 

 ornamentation of the margin can be made out. The stem in 

 its manner of branching and flexuose habit resembles a 

 miniature C . Jlexnosa. 



Campanularia flexuosa Hincks. This beautiful species 

 was found with gonosome well developed, on May 1st. The 

 gonangia differed from Hincks' description in being orna- 

 mented with shallow but regular annulations throughout their 

 length. At first glance no indication of this annulation is 

 seen, but with proper treatment of light the markings are 

 plainly made out, and appear to be as symmetrical as those so 

 beautifully shown in the gonangia of Clytea Johnstoni. 



Campanularia fragilis Hincks. Not before reported 

 from Plymouth. The single specimen secured from the rocks 

 near Millbay Channel was destitute of gonosome, but showed 

 the characteristic tubular plain-rimmed hydrothecae of the 

 species. The hydranths have about twenty tentacles, and the 

 proboscis is ovate in outline when the hydranth is expanded, 

 thus differing from most of the CampanularidcR, 



Gonothyr^ea loveni AUman. This is one of the most 

 abundant species at Plymouth. A number of specimens of 

 the genus that were brought in from time to time during 

 April and May differed so materially from G. loveni, and 

 agreed so closely with the descriptions of G. hyalina Hincks, 

 that I regarded them as belonging to the latter species, and 

 had so labelled them, when another batch of specimens was 

 brought in which showed completely intergrading forms join- 

 ing the typical G. loveni with almost typical G. hyalina. 

 There is a strong probability that these two so-called species 

 are but varieties of one form, which should bear the name of 

 G. loveni Allman. 



IV— I A 2 



