184 
1. Exuviaella lima , Ehr. ; Saville-Kent, Manual of Infusoria, 
1882, Vol. i. p. 462. Biitschli in Bronns Klass, unci Ord. d. 
Thier-Reichs, Abt. ii. p. 1002, pi. 51, f. 2, a-b-c. 
Rock-pools, Coogee Bay. 
2. Prorocentrum micans , Ehr. ; Kent, 1. c. Vol. i. p. 461, pi. 25, 
f. 37-39. Biitschli, 1. c. p. 1002, pi. 51, a-b. 
The typical form of this species was obtained from rock-pools 
at Coogee Bay ; I also found what may be a variety in gatherings 
from the tow-net. The body is elongate, narrowed towards each 
end, and the spine is longer and liner ; the cuirass is distinctly 
and coarsely cribate. 
Surface, off Green Point ; rock-pools, Coogee Bay. 
Order DINIFERA, Bergh. 
Family Dinophyida. 
3. Phalacroma rapa , Stein. ; Biitschli, 1. c. p. 1009, pi. 55, f. 2. 
Surface, off Green Point, P. J. 
4. Dinophysis Icevis , Bergh. Morp, Jahrbuch, Vol. vii. p. 224, 
pi. 15, f. 55. 
Surface, off Green Point, P. J . 
5. J), homunculus , Stein. ; Biitschli, l.c., pi. 55, f. 3, b. (Plate 
xxviii., figs. 9-16.) 
A large series of specimens of this line species in various stages 
of development were obtained from the surface off Green Point. 
The youngest specimens met with had the form of a round disc, 
without any trace of the transverse groove. During my 
examination of the material obtained by the tow-net, I saw 
some hundreds of examples exhibiting almost every gradation 
between the disc -like form and that of the adult. The various 
changes during the development appear to be as follow : — The 
round disc assumes an oblong shape, and the transverse groove 
appears at the anterior end of the body, which is slightly 
narrower than the posterior ; afterwards the longitudinal furrow 
is formed by the gradual extension of the membranous crests 
downwards, from the margin of the transverse groove. The next 
change is marked by the growth of the medium spine-like 
prolongation of the body, and afterwards by the formation of a 
similar, but much shorter, process at the base of the dorsal surface. 
Although the above mentioned stages have not been followed out 
in the life history of the individual, I am of the opinion that the 
presence of a large series of intermediate forms — gradually passing 
from the discoidal stage up to what I consider to be the adult — 
in one gathering, render it highly probable that they are simply 
the various stages in the development of one and the same species. 
The cell contents are green, and the cuirass is ornamented by the 
same cribriform markings in all the different forms. Several 
specimens were seen in process of division, the line of cleavage 
