A treatise on zoology . )latiS, coveringthe immediately adjacent folds. The canal that runs along above thehydroHpiroa and bidow the lancet and outer aido-])laton comes to at the oral end through a spiracle hounded by the A and lancet-j)late, and since the deltoid crests arc slight, the spiracles are almost THE BLASTOIDEA 87 single. Tlie anus ()])en3 tlirougli tlie posterior spiracle, through tlieoral end of post. A ; the position is less primitive than in Codaster^ but thegreater size of post. A seems primitive. Melahldsfus, Kth. & Carp. (1880),is represented by doubtful spec
A treatise on zoology . )latiS, coveringthe immediately adjacent folds. The canal that runs along above thehydroHpiroa and bidow the lancet and outer aido-])laton comes to at the oral end through a spiracle hounded by the A and lancet-j)late, and since the deltoid crests arc slight, the spiracles are almost THE BLASTOIDEA 87 single. Tlie anus ()])en3 tlirougli tlie posterior spiracle, through tlieoral end of post. A ; the position is less primitive than in Codaster^ but thegreater size of post. A seems primitive. Melahldsfus, Kth. & Carp. (1880),is represented by doubtful species in the Silurian of N. America, lessdoubtful from Devonian of Europe, and undoubted from Lower Carboni-ferous of N. America. It closely resembles Troostocrmus in form ; butthe A are all equal, small, and confined to the summit, while the two.
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishe, booksubjectzoology
