SPHHROMA PRIDEAUXTANUM, 415 
ISOPODA. SPH#ROMIDA. 
NORMALTA. 

SPHHROMA PRIDEAUXIANUM. 
Specific character. Oblong-ovate ; cephalon very broad. Segments of the 
pereion entire, convex; pleon with the penultimate joint produced into an 
angulated lobe on each side of the posterior margin ; last joint with two 
oblong carinz in the middle of the upper surface; extremity produced into an 
obtuse point, slightly notched on each side. 
Length, one-third of an inch. 
Spheroma Prideauxianum. Leacu, Dictionn. Sci, Nat. xii, p. 345. Dzs- 
MAREST, Cons. Crust. p. 299. Minne 
Epwarps, Crust. iii. p. 209. W. Tompson, 
Ann. Nat. Hist. xx. p. 245. Wuurrn, B. M. 
Cat. Brit. Crust. p. 76. 
Our description and figure of this species are taken 
from Dr. Leach’s type in the British Museum. It is 
more oblong than the preceding; but has the two plates 
of the lateral appendages of the tail short, the inner one 
being obliquely truncate. The upper antennz have the 
two basal joints broad and flat, the third joint slender, 
S, are -. ROLLA we & 
Mt DAA 
