
CAPRELLA ACANTHIFERA. 65 
AMPHIPODA. CAPRELLIDE, 
ABERRANITA. 

CAPRELLA ACANTHIFERA. 
(Skull-headed Skeleton Shrimp.) 
Specific character. Cephalon posteriorly and dorsally vaulted. First seg- 
ment of the pereion short; second, third, and fourth subequally long, sur- 
mounted by three large dorsal tubercles; fifth, sixth, and seventh segments 
short, each surmounted by two sublateral parallel tubercles. Second pair of 
gnathopoda having the propodos large in the male, rounded above and very 
concave below, the palm defined by a prominent tooth ; in the female the 
palm is slightly convex and the dorsal tubercles are less prominent. 
Length .§, of an inch in the male, and J in the female. 
Puce de mer arpenteuse. Da QuEronic, Mém. Math. et Physiq. Acad. Sci. 
Paris, t. ix. p. 329, fig. a B. 
Caprella acanthifera. Leacu, Edin. Ency. vii. p. 404 (not of Johnston 
and Couch). W. THompson, Ann. Nat. Hist. 
xx. p. 245. Wuuts, Cat. Brit. Crust. p. 60. 
Pop. Hist. Brit. Crust. p. 215. 
Caprella calva. Spence Barr, Cat. Amph. Crust. Brit. Mus. p. 
359, pl. lvi. fig. 11. 
VOL. II. r 
