BALE.—H ydroids from the New Zealand Coast. 251 
Hydrothecae campanulate, margin eres undulated, but in older 
Lydrodiéoné with undulations obscure, m Атап appearing simply ragged ; 
diaphragm often a ring somewhat oblique 
Gonothecae on short annulated 
peduncles, large, wide, mouth only 
very little elevated. 
Loc.—Taylor’s Mistake (Chilton). 
much larger. They are widest at the 
top, and noticeable for the shallow 
scarcely tubular lip. There is a series 
of numerous annular undulations, so 
slight that they might easily pass 
unnoticed but for the fact that the 
minute diatoms which invest the 
gonangia in great numbers have in 
rs 
The hydrothecae are ‘larger on 
the average than in O. nodosa, and 
usually more widened upwards ; there 
is no doubt as to the marginal struc- Fig. 2.Obelia coughtreyi n. sp. х 40. 
ture, which exhibits about 10-14 
undulations, or shallow rounded lobes, best seen in the newer hydro- 
thecae, as, apparently owing to their extreme delicacy, they soon become 
irregular and ragged. 
Obelia australis v. Lendenfeld. 
Farquhar, 1896, p. 460: Hartlaub, 1901, p. 367. 
Hartlaub records this species from French Pass. 
Gonothyraea parkeri (Hilgendorf). 
Calycella parkeri Hilgendorf, 1897, p. 205 (= G. hyalina Hincks, 1868, p. 184 ?). 
Among the specimens received from Professor Benham is a slide labelled 
“ Туре Calycella parkeri Hilgendorf.” The species does not resemble a 
Calycella, but is a Gonothyraea, possibly G. hyalina Hincks. But the 
specimen is not in good condition ; all the hydrothecae are more or less 
Hilgendorf says that the thecostome may be either “entire, wavy, or 
Pere serrated with small even teeth." The hydranths are similar to 
thos belia, but seem more slender than we are accustomed to find 
аваз in tin genus. They are all retracted into the hydrothecae, with the 
tentacles straight up, surrounding the proboscis: in this state the tentacles 
just eem aii the margin of the hydrotheca, or a little above it, while 
the proboscis is considerably shorter. is is not in accordance with 
Hilgendorfs statement that “when in a state of retraction it projects 
above the retracted tentacles.” 
The gonangia mostly contain three or four gonophores, or have them 
borne outside the capsule and attached to the blastostyle in a cluster. 
The gonophores themselves are too shrunken and too deeply stained to 
allow their structure to be seen oe but the characteristic tentacles 
can be traced on some of them 
