habits and structure, [53] f.;

affinities, [54]

Tennent, on land-leeches, [408]

Tentacles, in Polyclads, [15], [26];

in Triclads, [30], [36];

in Vorticeros, [45], [46];

in Trematodes, [53];

(peristomial), of Spionidae, [322];

(prostomial), [255], [260], [262] f.;

of Nereis, [248];