Microscopical Society of Victoria. 33 
liydrothecce, the other pointing upwards in a line with it; front 
margin completely free, forming a wide aperture. Cauline sarco¬ 
theca? similar to the laterals, two on the stem at the base of each 
pinna. 
Gonothecie 1 Colour, bright reddish-brown. Hah . QueensclifT. 
This form is closely allied to A . superha , but is much smaller, 
and differs in the number and arrangement of the teeth of the 
calycle, &c. I have met with but few specimens, and do not 
know whether it occurs with a branching habit. The name was 
suggested by the ascidian-like form of the lateral sarcotheca?. 
A. ilicistoma. n. sp. Plate XIY, fig. 4. 
Shoots in clusters, one to two inches in height, pinnate; pinna? 
curved towards the tips, close, sub-alternate, two on each internode. 
Hydrotheca? cup-shaped, set at an angle of about 55°; aperture with 
six teeth on each side; the first, fourth and fifth from the front 
everted, the second, third and sixth incurved ; the sixth on each 
side placed towards the back of the hydrotlieca, and curved 
forwards, so that the two appear in lateral view like one median 
tooth ; a single broad, incurved tooth in front: a group of two or 
three minute denticles within the front of the hydrotlieca near 
the base, and a smaller group just below. Mesial sarcotheca 
stout, slightly tapering, rising from the pinna, adnate to the 
hydrotlieca up to its margin, rising vertically above it, then curved 
forward and continued parallel with the pinna till it nearly 
reaches the next sarcotheca in front; with terminal and lateral 
orifices, the latter sub-tubular. Lateral sarcotheca? short, ovate, 
with a sub-tubular orifice directed forwards, and a lateral one on 
the inner side. Cauline sarcotheca? similar to the laterals, two on 
the stem at the base of each pinna. 
Gonotheca?? Colour, light brown. Hah. Queenscliff; Kobe 
S. A. ? (Mr. Smeaton). 
The teeth of the calycle, pointing in different directions, and 
somewhat resembling holly-spines, suggested the specific name. 
A. Tiiompsoni. n. sp. Plate XIY, fig. 1. 
Shoots in dense tufts, about two inches in height, pinnate, 
usually branched, stems with short internodes, each bearing a pair 
D 
