DYNAMENE RUBRA. 419 
ISOPODA. SPHHROMIDA, 
NORMALTA. 

DYNAMENE RUBRA. 
Specific character. Narrowly ovate, with the sixth segment simple ; outer 
plate of the uropoda shorter than the inner; central excavation in the 
terminal margin of the pleon of equal width throughout. Colour reddish 
or greyish buff, with black or red specks. 
Length, one-fifth of an inch. 
Oniscus ruber. Montagu MSS. 
Dynamene rubra. Leacu, Dictionn. Sci. Nat. xii. p. 344. Drsmanzsz, 
Cons. Crust. p. 298. 
Cymodocea rubra. Minn Epwarps, Crust. iii. p. 216. Wutrs, B. M. Cat. 
Brit. Crust. p. 77. Pop. Hist. Brit. Crust. p. 247. 
THIS species is rather narrow in form, with the sides 
of the body but little arched; the sixth segment is con- 
siderably larger than the seventh, and is unarmed at its 
posterior margin; the terminal segment of the tail is 
large and very convex, and is terminated by a longitu- 
dinal slit, which is nearly of equal width throughout its 
EE 2 
oo Soe Se 
