"Lr 
nd 
DESMIDS FROM SINGAPORE. 163 
his specimens had been somewhat damaged (vide his drawing of 
the polar lobe). Two whole specimens were seen; these were 
practically identical in form, but the arrangement of the central 
processes was different. In one there was a transverse row of 
5 processes across the basal part of the semicell, the central one 
being mueh the largest and showing indications of a division 
into two. In the other, there were but 4 processes in the trans- 
verse row, the two median ones being more or less irregularly 
divided. 
We consider that Turner is quite mistaken in supposing that 
the processes are tubular; they are hollow just like those of 
M. americana, M. Nordstedtiana, and M. muricata; moreover, 
from a physiologieal standpoint they could not be “tubular”! 
The membrane was quite smooth and of a pale yellow colour. 
We have no doubt that the M. apiculata, forma of Joshua, was 
a damaged form of the same species as M. anomala, W. B. Turn. 
The finding of the plant from Singapore extends its distribution 
eastwards, it being previously recorded from E. India (Turner) 
and Burmah (Joshua). 
28. MICRASTERIAS ROTATA, Ralfs, Brit. Desm. p. 71, t. 8. f. 1. 
Long. 208 u; lat. 165 p; lat. isthm. 29 u. 
29. M. Tnowasrawa, Archer, in Proc. Dubl. Nat. Hist. Soc. 
(1862) p. 72, t. 2. ff. 1-5. 
Two forms of this were seen: 
(1) A form a little narrower than the type and destitute of 
the superficial apiculate elevations ; the membrane was finely 
scrobieulate. 
Long. 192 p; lat. 150 p; lat. isthm. 27 u. Lat. : long.—1: pas 
. (2) A form without the central one of the three median pro- 
j'cüons ; the superficial apiculate elevations were also absent, 
but on one semicell a large apiculate elevation was present at 
the middle of the lateral lobe bordering upon the polar lobe and 
Close to itg margin. : 
Long. 175 lat. 144 p; lat. isthm. 26 p. Lat. : long-=1: 1'20. 
COSMARIUM, Corda. 
L C. Hawwnr, Reinsch, Algenfl. Frank. p. 111, t. 19. f. 1. 
728-22 u; lat. 17 p; lat. isthm. 5°5 p ; crass. 10 p. 
