DYNAMENE VIRIDIS. 421 
ISOPODA. SPH @ROMIDA. 
NORMALIA, 

DYNAMENE VIRIDIS. 
Specific character. Broadly ovate ; sixth segment simple ; terminal seg- 
ment of the pleon centrally very convex, with an outer flattened margin, and 
a terminal excavation, which is widest at its base. Colour green. Outer 
plate of the uropoda rather smaller than the interior. 
Length, about one-fifth of an inch. 
Dynamene viridis. Leacu, Dictionn. Sci. Nat. xii. p. 344. Dusmarzst, 
Cons. Crust. p. 298. 
Cymodocea viridis. Minne Epwarps, Crust, iii. p. 216. Wuuire, B. M. 
Cat. Brit. Crust. p. 77. Pop. Hist. Brit. Crust. 
p. 267. 
Tuts species is distinguished from the preceding by 
its broadly ovate form, and from the following by the 
sixth segment of the body being destitute of an in- 
cumbent spine; the dorsal surface is even, and destitute 
of ciliz. ‘The upper antennz are separated from each 
other at the base by a small oblong lobe; the second 
