52 
ease. The end-cells are 100-150» long, with a diameter of 10-164. 
Then the thickness of the filament increases to about 5 mm. from 
Especially characteristic of this Cladophora is a very abundant sere 
tion of swarmspores. The swarmspores are onl produced in a - 
cells (up to a diameter of 30 ») of the tufts of branches; they are ge 
as many as 20-50 are originated in one cell. The 
8 8 hesi 
abundantly on the filaments of the alga. They have a small ee 
dise, and are developed into thin branched sprouts like the Lely mor, 
of the older plants. The CJ. fertilis belongs to the tribe nese ee 
(Kiitz.) come subdivision D. Crystalline, De Ton! (Sylloge a 
p- 318).” 
Hab.: Deception Bay. 
(Plate XIV., Figs. 1 and 2.) 
SIPHONE. 
ACETABULARIA, Lamx. 
A. calyculus, Quoy et Gaim. Professor Askenasy says ~~ 
by different enquire he act ee then ae 
. jority have had beto i 
tei » Lamour. In the latest is Cramer (upon t evertig 
pt ie ps Denkschr. d. schweiz naturf. Ges. Bd. 30), 1 W™ be 
igured. 4. cal has hith si 
Ma we know about it is principally due to Harvey, tion and 
e 
yeologia Australis, Pl, 249, has given a very good illustra 
short description of this species : ae ed to 
The specimens of A. cal culus forwarded to me were fasten ‘a 
aa 
mussel-shells. By dissolving these in acid I was able to ascertain 
in this species ({ ; 
arently perennial basal-piece is present, hi 
; ‘ Bg h th 
dises originate, Thickly above the upper surface of 
Ds : 
dden in the . 
is 
e 8 = 
anne talked 
to it, makes it seem probable to me that here en ne strato a 
