Text Appearing Before Image: 230 THE AMERICAN MUSEUM JOURNAL some of which are shown in Fig. 13. Those having one or two axes may be straight, curved, or bent at various angles. They may be pointed, rounded or knobbed at one or both ends. They may be smooth or spined. Spicules having a greater number of axes may also have their arms pointed, rounded or knobbed, or each arm may be branched, either once or twice, or to such a degree as to present a great variety of star-like figures. Spicules occasionally assume extremely odd shapes. Some look like tiny cuff-buttons, others like anchors, horseshots and hooks of peculiar design, while still others are coiled like springs. As regards size they may be divided into two classes: Text Appearing After Image: FIG. 14.—A DICTYONID SPONGE (.Farrea occa Carter) With rigid lattice-like skeleton. megascleres, or large spicules, and microsderes, or small spicules. The megascleres form the main supporting structure of the skeleton and are bound together in long fiber-like bundles which are either parallel, or cross each other so as to form triangular or square meshes. They are sometimes entangled and interlaced in all directions like felt, clinging to each other with their hooks and projections. In the Dictyonid sponges (Fig. 14) the megascleres are of three axes at right angles to each other and are arranged with points overlapping. During the life of the sponge these
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