Scutuloidea maculata X 12; a, inner antenna X 40; b, auditory seta from same, more highly magnified; c, mandible X 40; d, first maxilla X 40; e, second maxilla X 74; f, seta from outer lobe of same highly magnified; g, inner lobe of same X 160; h, maxillipede X 40; k, first thoracic leg X 15; l, end of same X 40; m, second thoracic leg X 15; n, end of same X 40; o, one of the pleopoda X 30; p, abdomen from below X 12.

Hymenosoma lacustris; a, third (external) maxillipede X 10; b and c, different forms of setæ from the same, more highly magnified; d, chela of male X 8; e, abdomen of male X 15.

Cubaris rugulosus; a, inner antenna X 40; b, outer antenna X 10; c, scale-like markings on the integument X 120.

Anthura affinis; a, antennæ from above X 23; b, first thoracic leg X 15; c, second thoracic leg X 13; d, extremity of same, more highly magnified; e, abdomen, with telson and last pair of pleopoda, from above, X 30; f, first pleopod X 30.

Plakarthrium typicum X 12; a, inner antenna X 18; b, outer antenna X 18; c, mandible X 120; d, first thoracic leg X 18; e, extremity of same X 75; f, third thoracic leg X 40; g, one of the pleopoda X 30; h, another form of the pleopoda X 30; k, last pair of pleopoda X 24.

Limnoria segnis; a, antennæ from above X 60; b, mandible X 120; c, maxillipede X 120; d, appendage of sixth segment of pleon X 40.

Nicea egregia, female X 6; a, portion of flagellum of upper antennæ with auditory cilia X 40; b, portion of flagellum of lower antenna X 60; c, mandible X 40; d, maxillipede X 60; e, first gnathopod X 30; f, second gnathopod of fully developed male X 13; g, second gnathopod of young male X 13; h, transverse section through one of the segments of pereion of male X 15; k, extremity of pleon X 30; l, telson, from above X 40.

Moera spinosa; a, second gnathopod of female, which is the same as second gnathopod of left side of male X 13.

Moera petriei; a, second gnathopod of female X 13.

Harmonia crassipes; a, first gnathopod of female X 35; b, second gnathopod of female X 35.

Cyproidia (?) crassa X 30; a, upper antenna, and b, lower antenna, in position, X 70; c, first gnathopod X 70; d, telson and three posterior pleopoda from above X 120.

Podocerus frequens X 30; a, first gnathopod X 40; b, second gnathopod of male X 30; c, extremity of pleon X 70.

Moera incerta X 13; a, first gnathopod X 30; b, second gnathopod X 30; c fifth pereiopod X 30; d, dactylos of same X 120; e, telson and last pair of pleopoda from above X 30.