of Holothuria nigra, [561]

Black Corals (= Gerardia, [406], and Antipatharia, [407])

Bladder, of Rotifers and Platyhelminthes, [14] n.

Blanchard, on Sporozoa, [94]

Blastocoel, [603]

Blastoidea, [580], [599] f.

Blastomere, [603]

Blastostyles, [265]

Blasts of Coccidiaceae, morphology of, [120];

of Acystosporidae, [104] f.