. Annali del Museo civico di storia naturale Giacomo Doria. Natural history. WEST INDIAN DEMOSPONGIAE 169 : massive near the base of attachment, then flattening and giving out two thin and irregular processes. Violet-brown in life. BY. 19: fragment of an irregularly branching, repent sponge. Violet- brown in Fig. 81 50 [xm. Cribrochalina vasculum (Lamarck). Spicules of specimen Scale: : a fragment, 10 x 5 cm wide, 6 to 8 mm thick, of a laminar sponge growing attached by a border. The colour in life was dark brown- ish purple, the interior tan. Now in formalin, the colou
. Annali del Museo civico di storia naturale Giacomo Doria. Natural history. WEST INDIAN DEMOSPONGIAE 169 : massive near the base of attachment, then flattening and giving out two thin and irregular processes. Violet-brown in life. BY. 19: fragment of an irregularly branching, repent sponge. Violet- brown in Fig. 81 50 [xm. Cribrochalina vasculum (Lamarck). Spicules of specimen Scale: : a fragment, 10 x 5 cm wide, 6 to 8 mm thick, of a laminar sponge growing attached by a border. The colour in life was dark brown- ish purple, the interior tan. Now in formalin, the colour is drab, the consistency incompressible, tough, scarcely pliable. : a small irregular lamella, 5-10 mm thick. In formalin, the specimen is tough, resilient; its colour is olive. The ectosomal skeleton is a reticulation of spicular tracts 45-100 [xm thick forming roundish meshes 140-230 \im wide. The ectosome is not separable. The choanosomal skeleton consists of strong, dense spicular tracts ascending, branching, bending toward the surface. They are 70-270 [xm thick and 200 to 400 fxm apart. Irregular connections are made by thinner tracts. The binding colourless spongin does not overlap the tracts. Spicules: oxeas slightly curved, measuring 32-250 x 2-9 [xm. The extremities are markedly variable. The smallest oxeas (32-80 (xm long) are not abundant and might be regarded as belonging to a separate category, but intermediates are present. In 1965 there still was available in the Duchassaing & Michelotti collection at Turin a specimen labeled Agelas albo-lutea D. & M. It was a laminar fragment, 5x8 cm wide, about 6 mm thick; it bore the register number I have two slides obtained from this specimen: it definitely belongs to Cribrochalina Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original w
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