A history of the British sessile-eyed Crustacea . t; andthough there was much effort, there was little effect. Kroyer has separated from this genus two othersupon characters which appear to us to be very tail in Caprella is rudimentary, and exists in a semi-membranous condition. The development of this abnor-mally rudimentary part is, within small limits, the degree of its development Kroyer has foundedthe genera Podalirius and u3^gina. It is only after a care-ful consideration of the structure of the animals that wehave arrived at the conclusion that the establishme
A history of the British sessile-eyed Crustacea . t; andthough there was much effort, there was little effect. Kroyer has separated from this genus two othersupon characters which appear to us to be very tail in Caprella is rudimentary, and exists in a semi-membranous condition. The development of this abnor-mally rudimentary part is, within small limits, the degree of its development Kroyer has foundedthe genera Podalirius and u3^gina. It is only after a care-ful consideration of the structure of the animals that wehave arrived at the conclusion that the establishment ofthese two genera is unnecessary. The genus Cercops alsoof Kroyer is mainly distinguished from Caprella by thesmall terminal abdomen being six-jointed and styliferous,but the second pair of legs have a vesicle at the base, asin Proto. The geographical distribution of this genus is veryuniversal, since species are recorded from almost everylocality that has been visited by the carcinologist. 52 AMPHIPODA. ABERRANTIA. CAPRELLTD-E.
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