304 Prof. Mcintosh's Notes from the 



size were also procured in the surface-net. The reproductive 

 organs were well developed, but not quite ripe. This month 

 and January would appear to be the period during which 

 these Hydromedusas as a rule reach full maturity. Lo Bianco 

 states {fide Chun) that the ova of Tima flabellaris are ripe in 

 October. 



This form was first observed by Dr. Johnston, of Berwick, 

 in 1883, and shortly after by Edward Forbes on the West 

 Sands at St. Andrews. It abounds all along the eastern 

 shores of Britain to the estuary of the Thames. 



The Hydroid stock from which Tima springs is not well 

 known, though Hasckel gives Lafoea and Campanularia for 

 the group. Louis Agassiz had formerly raised the Campanu- 

 larian zoophyte from an American Tima. 



Willia stellata, Forbes? 



Another gonozooid 2'5 millim. in diameter presented a 

 somewhat globular umbrella with twenty-four large purplish 

 tentacular bulbs, from which proceeded as many slightly 

 pinkish tentacles. The subumbrella reached nearly to the 

 tip of the umbrella. The lips of the peduncle were produced 

 into four branched filiform processes. The four double ovaries 

 were filled with large orange-red ova, apparently ripe. 



Melicertum (Stomobrachium) octocostatum, Sars, appeared in 

 the midwater-net in January, and thereafter disappeared till 

 August, when small numbers were captured once in the same 

 net. It occurred sparingly once or twice in September and 

 of good size. Throughout October similar specimens were 

 occasionally met with in considerable numbers. None were 

 mature. It was somewhat plentiful in the surface-net at the 

 commencement of December, and a few, ^ inch in vertical 

 diameter, likewise were got in the midwater-net. This form 

 appears to attain full size at St. Andrews. Forbes did not 

 frequently meet with this common species. 



Circe rosea, Forbes, was present in great numbers in January, 

 not only in the bay but far out at sea, and at surface, mid- 

 water, and bottom. Vast numbers continued throughout 

 February in the midwater-net and smaller numbers in the 

 surface- and bottom-nets. Many young specimens were 

 present. In the large forms the reproductive organs showed 

 numerous clear cells. In March they were still very abun- 

 dant in the midwater- and bottom-nets, and the majority were 

 full-grown, though small forms were also mingled with them. 

 Circe attained full growth in April ; indeed no larger forms 



