14 DEPARTMENT OF THE NAVAL SERVICE 4 
7 GEORGE V, A. 1917 
Synedra investiens W. Sm., is cigar-shaped or slightly spindle-shaped when seen 
from the front, and narrowly rectangular in side view, and grows in clusters which are 
closely attached to the supporting object, and radiate from the point of attachment. 
It is marked by cross striations which number about nine in ten microns. 
Fig. 1. 
Fig. 2. 
Licmophora Lyngbyei (Kutz.) Grun, on leg bristles of 
lobster larva. 
Iicmophora Lyngbyet (Kutz.) Grun. is wedge-shaped in the front or 
valve view, and club or paddle-shaped when seen in profile. The nucleus in 
Iicmophora is usually visible near the centre of the cell, which is generally filled com- 
pletely with yellowish granules. The markings on the shell are delicate, and appear as 
transverse ridges along the edges of the valves, varying from twelve per ten microns 
near the base, to fifteen near the upper or broad end. The stalks on which the individ- 
uals grow are slender and colourless, and may be so short as to be indistinguishable, 
or may reach to four or more times the length of the valves. 
