Quasillina, [224]

Quatrefages, de, [376]

Quelch, [280]

Quinqueloculina, [59], [65] f.

Quinqueloculine type, [67]

Radial blood-strand (or vessel), of Asterias rubens, [450];

of Ophiothrix fragilis, [488]

Radial canal, of water-vascular system, [428];

of Asterias rubens, [441];

of Ophiothrix fragilis, [480], [486];