found on the Coast of Northumberland. 315 
fourth produced into a club-shaped tentacle, apparently not 
capable of much extension. The peduncle is rather long and 
thick, terminating in a plain rounded mouth. 
These medusoids were produced from one only of the indi- 
viduals obtained ; the other had gonophores of a different shape, 
having tuberculated lobes rising somewhat irregularly from the 
upper part, as represented in fig. 5. These reproductive bodies 
were also sessile, and remained attached during the whole time 
that the polype continued to live—about ten days—without 
showing the least signs of assuming the medusoid form. Indeed 
their appearance was very different from that of the same organs 
in the medusa-bearing individual, and I have little doubt of their 
remaining permanently fixed. This difference in the reproductive 
organs in different individuals of the same species has not been 
before observed, as far as I am aware, in this genus. They 
probably represent a sexual distinction. Professor Sars has met 
with a Corymorpha on the Norwegian coast (C. glacialis, Sars), 
in which the gonophores are persistent, and apparently somewhat 
similar to the non-medusoid form of this species; but in the 
Norwegian Zoophyte both sexes were found to have the same 
character. 
. Family Sertulariadz. 
Halecium filiforme, n. sp. 
Polypary very slender, flexible, simple or consisting of a 
single tube throughout; the stem not much branched; the 
branchlets short, alternate, arising from the side of a cell; the 
internodes rather long. Cells rather slender, tubular, with a 
slightly everted rim. Length 44 inches. 
From the fishing-boats, Cullercoats. 
This species is distinguished from all those of a similar size, 
belonging to the same genus, by having the stem simple and 
uncompounded throughout its whole length, as well as by its 
very slender thread-like form and great flexibility; most of the 
species of this genus becoming rigid whendry. It has occurred 
to me only once, when I obtained a few specimens together, 
apparently torn from the same base. The reproductive capsules 
were absent, but there can be little doubt of its distinctness from 
any described species. 
Family Campanulariade. 
Campanularia raridentata, n.sp. Pl. XIV. f. 5. 
Polypary with a creeping stem, from a slight bulbous expan- 
sion of which arise at intervals rather short pedicles, ringed 
above and below, and terminated by a single cell. Cells rather 
long and narrow, tapering a little below, and with 5 or 6 deep 
pointed crenulations round the margin, Height ;', inch. 
