United States National Museum, Smithsonian Institution, United States. Department of the Interior · Washington : Smithsonian Institution Press, [etc.]; for sale by the Supt. of Docs., U.S. Govt Print. Off. · leaf 76
tubes have a disk near the junction with the zooecium, and in the middle of the axial tubes, which are often very long, there are similar disks (fig. 7, A). The shell structure is terminated by a membrane (b) (fig. 7, B) perforated by these pores; but over this, as in the greater part of the… … A x 1 00 D x100 B x 1 00 Fig. 6. — Microstructure of the tremocyst and olocyst. A. Stomachetosella crassicollis Canu and Bassler, 1917. Tangential section, X 100, at the level of the subjacent olocyst; the inner orifice of the tremopores is visible. B . Porella e rassoparies, new species. X 100.…
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