960 Transactions.—Zoology. 
Family, Gemellariide. 
CarnwELLiA, Wyv. Thomson. 
Cells in pairs, joined back to back. Each pair of cells arising by tubu- 
lar prolongations from the pair next but one below it. Each pair having a 
direction at right angles to the next. At a bifurcation, each cell of the 
primary pair giving off a secondary pair.  Ovicell, sub-globular, placed 
immediately above and behind the posterior margin of the cell aperture. 
Calwellia bicornis, Wyv. Thomson, ** Nat. Hist. Rev.," 1858. 
The only known species. 
New Zealand, on Catenicella hastata, Dr. Joliffe. 
Family, Vincularide. 
Zoarium rigid, ealeareous, unarticulated; cells disposed alternately 
round an imaginary axis, forming dichotomously dividing branches. Sur- 
face of polyzoary not areolated. 
VINCULARIA. 
Branches of zoarium not tubular ; front of cells surrounded by a raised 
border, arcuate above, nearly straight below. Ovicells, immersed, opening 
above the mouth of the cell upon which they are placed. 
Vincularia neo-zelandica, Busk, ** Jour. Micros. Science,” N.S., I., p. 155. 
* Zoarium simple, rooted at the base by radical tubes; ares of cells, 
sub-pyriform ; anterior wall perforated ; margins smooth; orifiee arched 
above; lower lip with a broad central denticle." 
New Zealand, Dr. Lyall. 
Dimetopia spicata, Busk. This species is pink when alive. 
Crisia eburnia, ** Cat. Mar. Moll.,” p. 100. 
This is C. patagonica, D'Orb., « Voy. Amer. Mend.,” Polypiers, p. 7. 
‘Cells 9-19, straight, very distinct ; branches arising from second or 
third cell; joints black." 
Crisia aculeata, ** Cat. Mar. Moll.," p. 101. 
This is C. edwardsiana, D'Orb., loc. cit., p. 7. 
Zooceia two or three in an internode. 
Homera gouldiana et H. squamosa, ** Cat. Mar. Moll.," p. 101. 
These two species belong to the genus fietihornera, as defined by Busk. 
H. squamosa is identical with R. foliacea, M'Gillivray. Mr. Busk thinks 
that his H. gouldiana belongs also to the same species, but I am inclined to 
keep them separate. 
Idmonea radians, Lamark, ** Hist. d. an. s. Vert.," 2nd ed., p. 279. 
** Zoarium usually procumbent, stipitate, sometimes sub- 
erect; branches, 
dichotomous, 
radiating more or less regularly in a circular form from the 
centre, very angular in front ; dorsal surface, perforated ; cells, 
in each series, the innermost the lon 
bi-labiate." 
one to four 
gest; aperture (when quite perfect) 
