Microscopical Society of Victoria. 
23 
axil; those of a pair adnate to each other, divergent, adnate by 
the base only to the hydrocaulus, from which they project forward 
almost horizontally; aperture tubular, transversely oval, with 
two small lateral teeth; directed forwards and outwards and a 
little upwards; a large, erect, tubular process at each side of the 
mouth. 
Gonothecse ? Colour, yellowish. Ilab. QueensclifF. 
S. acanthostoma. n . sp . Plate XII, fig. 4. 
Stem pinnate, pinnae opposite, not jointed to the stem, distant, 
each pair separated from the next by three pairs of hydro thecas. 
Hydrothecm on the stem opposite, on the pinnae sub-alternate ; 
one pair to each internode, except the proximal internodes of the 
pinme, which bear a single one on the lower side ; divergent, 
ascending, sinuated on the inner side, expanding upwards. 
Aperture wide, with three large and four small teeth on each side, 
two of the latter rising from within the margin, and two small 
teeth springing from tlxe inner side of a small chamber or 
invagination of the wall of the hvdrotheca at the front (outer) 
margin. A small process projecting horizontally into the 
hydrotheca from about the middle of the inner side, with a 
double line continued from it across the cell; a second process 
projecting into the cell from the outer side, near the base. 
Gonothecse ? Colour, light yellowish. Ilab . Robe, S. A. ? 
(Mr. Smeaton). 
S. recta. 7 i . sp . Plate XII, fig. 5. 
Stem flexuous, alternately pinnate, each internode bearing near 
its base a pinna with an axillary hydrotheca, and above, a pair 
of hydrothecse. Hydro thecae sub-alternate, one pair to each 
internode, large, smooth, flask-shaped, upper side projecting at 
right angles to the hydrocaulus ; aperture small, directed upwards 
and outwards, with two rounded lateral teeth, one of which 
almost or quite conceals the other in a front or back view of the 
polypidom. 
Gonotheca} ? Colour, brownish-red, liydrothecje pale, except 
towards the. mouth. Ilab., Brighton, S.A. ? (Mr. Smeaton). 
