32 NOTES ON AUSTRALIAN CHAETOGNATHA, 
animal. From the posterior end of the tail to the ganglion 
is 67% of the total length. A collarette is present. 
Australian localities: Tasman Sea, 50 miles E. of 
Sydney—previously reported from Shark Bay, W.A. 
(Ritter-Zahony, 1910). Also recorded from New Guinea ; 
the East Indies ; Indo-Pacific ; Maldives ; and the North 
Pacific. 
5. S. minima Grassi. 
Syn: Spadella minima Grassi, 1881. 
Transparent and comparatively stout, with a neck 
region visible, though there is no marked constriction. 
In one of our specimens, which was almost mature, the 
ovaries were compact and club-shaped, the whole tail filled 
with developing spermatozoa’; the seminal vesicles, however, 
were very small. There is no constriction at the septum, 
but the decrease in size is rather sudden. 20% is the maxi- 
mum tail percentage recorded, but one of our specimens 
has a percentage of over 23%. The anterior fin almost 
reaches the ganglion. 
Australian localities: 50 miles E. of Sydney (June, 
1906) ; already known from Shark Bay, W.A. (Ritter- 
Zahony, 1910). Also recorded from Japan ; Indian Ocean ; 
Mid Atlantic ; and the Mediterranean Sea. 
6. S. bedoti Beraneck. 
Syn: S. bipunctata Aida, 1895. 
S. polyodon Doncaster, 1902. 
This form is not among our Eastern Australian material 
the following information being taken from Michael (1911, 
p.- 75). No colldrette ; head small; sudden diminution 
at tail septum ; anterior fin longer than posterior ; pos- 
terior fin extends to seminal vesicles ; less than 50% of 
posterior fin in front of tail septum. 
Australian localities : Shark Bay, W.A. (Ritter-Zahony, 
1910). Also recorded from the East Indies ; Japan : Indo- 
Pacific ; Maldives (as S. polyodon). 
7. S. regularis Aida. 
Syn: S. bedfordit Doncaster, 1902. 
We have examined only one immature specimen, 
