KEPOKT ON THE POLYZOA. 
3 
(1) Crisia biciliata , Macgilliv. (PL I. figs. 1, 2). 
Crisia biciliata, Macgilliv., Nat. Hist. Viet., Dec. iv. p. 37, pi. xxxix. fig. 2. 
Character. — An opposite pair of perfect zooecia in each internocle, with a third 
intermediate aborted one between them, from which the succeeding pair or a branch 
arises. A pair of long, jointed spines articulated to the outer part of each zocecium, 
excepting those bearing the secondary branches. Ooecia small, much elongated, 
pyriform, situated at the angle of a bifurcation. Zooecia 0 - 07 mm. in diameter. 
Habitat. — Station 135, Tristan da Cunha, 60 to 1100 fathoms, rock and shells; 
[Williamstown, Mapleston ; Warrnambool, Wqtts]. 
As Mr. Macgillivray remarks (p. 38) “The aspect and general arrangement of the 
cells are the same as in C. edivardsiana, d’Orb. There are two cells in each internode, 
except in those from which the branches originate. The cells, as he observes, are not 
so long as those represented in M. d’Orbigny’s figure of C. edivardsiana, and are wider 
superiorly, and the free part is not so long, and is much more abruptly curved forwards ; 
the ooecial cell is smaller, more elongated, and each lateral cell supports usually two, 
but sometimes only one long-jointed spine.” 
Mr. Macgillivray further remarks that he is doubtful to what species my description 
and figures of Crisia edivardsiana (Brit. Mus. Cat., pt. iii. p. 5, pi. ii. figs. 5-8) refer, 
and I am compelled to say that subsequent examination of the specimens from which 
that description was chiefly drawn, some of which were from Tierra del Fuego, collected 
by Mr. Darwin, and others from New Zealand, procured by Dr. Sinclair, has left 
considerable doubt in my mind as to the identity of these two forms ; the latter, it is 
highly probable, is distinct from the Patagonian Crisia edivardsiana, in which the 
zooecia, as represented by M. d’Orbigny, are very long and erect, whilst in the New 
Zealand species they are short and curved forwards. There is also another form or variety 
closely approaching the New Zealand species, but in some measure intermediate between 
that aud the South American one, which may turn out to be distinct from either, and 
to form an intermediate variety, characterised by a tendency to have two or more 
pairs of cells in some of the internodes, and less exactly opposite. All three, however, 
are furnished with only a single articulated sjDine, which arises close below the mouth, 
instead of low down the back as in Crisia biciliata. One character is observable in the 
New Zealand form which I have not noticed in the others, viz., that the dorsal aspect of 
the pair of zooecia is entire, and faintly striated transversely. 
§§ b. Zooecia numerous (more than six) in each internode, alternate on the 
two sides. Ooecia irregularly disposed, often absent. 
Crisia (pars), Auctt. 
