
oo aes Sat es 
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4A, CAPRELLID A, 
AMPHIPODA. CAPRELLID. 
ABERRANTIA. 
Genus—PROTELLA. 
Protella. Dana, U. 8. Explor. Exped. p. 812. Spence Barn, Cat. Amph. 
Brit. Mus. p. 351. 
Generic character. Cephalon confluent with the first seg- 
ment of the pereion. Pereion having the last two segments 
shorter than the preceding. Pleon rudimentary. Appendages 
to the cephalon well developed. Gnathopoda subchelate ; first 
two pairs of pereiopoda rudimentary, but having branchiz 
attached ; last three pair subequally long and robust. Anterior 
pair of pleopoda rudimentary, the rest obsolete. 
Tuts genus differs from Proto in several important 
points: among the most conspicuous is the very rudi- 
mentary character of the third and fourth pairs of legs, 
which are represented by two small, uni-articulate, leaf- 
like plates. ‘The penultimate segment of the body is as 
short as the last; consequently, the last three pairs of 
legs are situated closely together at the posterior ex- 
tremity of the animal. Branchize are attached to the 
third and fourth segments of the body, which, in the 
female, have also attached the plates belonging to the 
incubatory pouch. 
This genus was established by Dana, as possessing a 
character intermediate between that of Proto and Ca- 
prella, from which last it is distinguished by the character 
of the appendages of the intermediate segments of the 
body. 
Our knowledge of this genus is, as yet, confined to 
two species, one belonging to Britain, the other to South 
America; therefore its geographical range cannot pro- 
perly be estimated. 
