Microscopical Society of Victoria 
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into swollen internodes, each bearing a hydrotheca on its upper 
part. Hydrothecae divergent, smooth, contracted near the 
aperture, swollen below ; aperture with three marginal teeth, one 
superior and two lateral, also with three internal, compressed, 
vertical teeth, alternating with those on the margin. 
Gonothecae borne on the stems, frequently three or four in a 
row, twice or three times the length of the hydrothecae; ovate, 
with strong transverse rugae and a tubular neck, with three 
indistinct teeth on the summit. 
Colour, light brown; the polypidom thick and solid. Uab. 
Williamstown. 
The gonothecae vary much in the number and distinctness of 
the transverse rugae, sometimes bearing a strong resemblance to 
those of the last species. 
S. PYGMiEA. n. sp . Plate XII, fig. 9. 
Hydrorhiza delicate, shoots simple, twisted at the base, about 
one-fourth of an inch in height; divided by twisted joints into 
internodes, each bearing a hydrotheca on its upper part. Hydro- 
thecae divergent, tubular, or sub-conical, smooth ; aperture not 
contracted, with three teeth, one superior and two lateral. 
Gonothecae about three times the length of the hydrothecae, 
borne two or three on a stem; with close, strong, double transverse 
rugae their whole length, and a short, tubular neck, with entire 
margin, rising from within the uppermost of the transverse rugae; 
the narrow interspace between the double costae closely striated. 
Colour, yellowisli-brown. Ilab. Queenscliff; Griffiths’ Point, 
(Mr. Goldstein). 
This species closely resembles S. Johnstoni , Gray, in the form 
of the calycles, but differs in its minute size and simple habit. 
S. MACROTIIECA. n. sp. Plate XIII, fig. 1. 
Shoots simple, about half an inch in height, twisted at the base, 
divided by twisted joints into internodes, each bearing a hydro¬ 
theca on its upper part. Hydro thecae very large, close, smooth, 
slightly divergent, both series directed towards the front; 
aperture contracted, with three inconspicuous marginal teeth; 
three internal, compressed vertical teeth within the front margin, 
extending about one-third across the cell, the central one largest; 
