109 
Zoophytes from Australia and New Zealand. 
ment, not anastomosing, creeping over seaweeds. Hydro- 
caulus attaining a height of about ^ inch, flexuous, giving off 
alternate pinnae at short intervals. Hydrothecae in pairs, 
opposite or subalternate, one pair to each internode on the 
pinnae. Joints on the main stem immediately below the 
points of origin of the pinnae. A hydrotheca in the axil of 
each pinna. Hydrothecae small, flask-shaped, divergent; 
aperture small, looking directly upwards, with two sharp 
teeth. Colour reddish brown. 
Gonosome. Gonangia large, about five times as long as the 
hydrothecae, one to each hydrocaulus, arising from a point 
just below the base of a hydrotheca, very near the bottom of 
the main stem ; smooth, obovate, truncate at the top, with 
two long spines on opposite sides of the orifice; margin 
everted ; orifice destitute of teeth. 
Locality. George Town {Dr. Harvey). 
Sertularia bicuspidata , a species described by Lamarck 
( loc. cit.) from an unknown locality, seems to differ little from 
the present form, so far as can be judged from the short 
description given of it. Lamarck defines it as “ S. minima, 
ramosa, nodulifera; denticulis oppositis, acutis,” and adds, 
“ Les petits noeuds bien sdpards, sont formes de deux cellules 
opposdes, a pointes divergentes en dehors : longueur, douze 
millimetres.” In the absence, however, of more complete 
information, I prefer to describe my species under a new 
name. The hydrothecse show a considerable resemblance to 
those of 8. filicula ; and I have therefore, for want of a better 
word, made use of the expression “flask-shaped,” as employed 
in describing that species both by Dr. Johnston and Mr. 
Hincks. In my species the form of the hydrothecae reminds 
me a good deal of an ancient Roman or Etruscan lamp. 
Though 8 . pulchella has no other special characters in 
common with 8. elongata , the gonangia so closely resemble 
those of that species, that a single figure will serve for both. 
They are, however, a little smaller, and the circlet of minute 
denticles is not present around the mouth. 
Sertularia insignis , sp. nov. (PI. XIX. figs. 1, 1 a.) 
Trophosome. Hydrorhiza consisting of a few short fibres, 
neither branching nor anastomosing. Hydrocaulus attaining a 
height of 6 or 7 inches ; pinme opposite. Hydrothecae tubular, 
unconstricted, rather long; the orifice with about six small 
rounded teeth, those on the main stem divergent at right 
angles, opposite; those on the pinnae diverging slightly up¬ 
wards, alternate or subalternate. Colour yellow. 
Gonosome. Gonangia springing from the base of the piunas, 
