Barnr.—Hydroids from the New Zealand Coast. 245 
extremely short apophyses, Viel iade bearing usually 1-2 pairs of hydro- 
thecae, and occasionally a secondary ramule. 
Hydrothecae in pairs, penes adnate in front, upper half curving 
outward and forward and becoming narrower; aperture vertical, facing 
outward and forward, with two large angular lateral lobes, thinned away 
to margin. 
Gonangia ovate, widest near the middle, with faint annular undu- 
lations, most distinct in upper half; aperture circular, margin not thickened, 
a circlet of thick ре processes projecting into the neck. 
Loc.—Lyttelton (Chil 
The largest amen à is B ы t $in. long; it has one pinna on right 
side, then two on left, then five on right, so that no definite order can 
traced. Stem and branches do not appreciably differ, either in size 
or form, and hydrothecae have the same arrangement throughout. In 
striking contrast to the last species, TRUE ulus is much constricted 
between pairs of hydrothecae, and especially between internodes, where 
joints are of oblique type, sloping backward and upward, so that inter- 
node, which is very wide at base of hydrothecae, narrows rapidly down- 
rd to a point in front, while part above hydrothecae is narrower 
throughout. Between the pairs on an uc ded though the joint is 
wanting, the constriction is still marked. U art of hydrothecae is 
turned so much forward that in front view с lateral tooth is scarcely 
noticeable, being so much foreshortened. 
The gonangia are similar to those of the allied species, T. tuba and 
T. buski. 
Sertularia episcopus (Allman). 
Sertularia fusiformis Hutton, 1872, reis 257: Coughtrey, 1874, p. 285: Ridley, 
1881, p. 105 ? : 5 1892, р 
Sertularia longicosta Coughtrey, 1853, р. A 00 1876, p. 2 
Sertularella episcopus ye etx 1876, p. 263: Farquhar, 1806, p. 464: Hartlaub, 
1905, p. 658. 
This species, having the character formerly considered typical of 
rege т and the name fusiformis having been preoccupied in that 
, Allman named it S. episcopus ge Coughtrey S. longicosta. The 
ime described in Allman's paper of 1876 were mentioned in a preliminary 
note in Nature in 1874, with short descriptions to ensure priority; hence the 
adoption of the name S. episcopus in ке to to S. longicosta. 
It is not easy to ascertain the true form of the gonangia, as they 
vary so much, and have the appearance” of having shrunk considerably 
in i Those which appear the best preserved are of an elongated 
з 
end to end, formed by an inflection of the perisare: this channel being 
narrow and abrupt, its чр form two longitudinal ridges, which are 
me 
border, and looks as if Шыу Ка throu ec 
e hydrotheca-apertures are, in the form of their two lateral lobes, 
ру to those of S. macrocarpa Bale (Odontotheca macrocarpa Levinsen). 
S. allumi (M. & T.) has the same type of aperture, and also agrees 
MR the present species in the very unusual character of having each 
hydrotheca on a separate internode. No opercula could be distinguished 
