of Asterias, [459];
of Asterina, [459];
of Echinasteridae, [459];
of Astropectinidae, [459]
Rectum, of Asterias rubens, [439];
of Holothuria nigra, [563]
Red colour of sea, due to Dinoflagellata, [132]
Red Corals (= Coralliidae, [352])
Red marrow of bones, habitat of resting states of malarial parasites, [106] n.
Red snow, [125]