. Annali del Museo civico di storia naturale Giacomo Doria. Natural history. WEST INDIAN DEMOSPONGIAE 175 the surface the meshes are reduced to 90-280 ^m. The structure of the ectosomal skeleton is not uniform: in some areas it is possible to distinguish main fibres about 45 ^m thick forming meshes devoid of regularity, about 200-450 [im wide, and within them a secondary reti- culation of fibres 10-20 [im thick forming meshes 70-140 \im wide. All the fibres are cored, not uniformly, by Fig. 84 - Toxochalina multiformis sp. n., the holotype. Scale: 3 cm. : the specimen is cushion-s
. Annali del Museo civico di storia naturale Giacomo Doria. Natural history. WEST INDIAN DEMOSPONGIAE 175 the surface the meshes are reduced to 90-280 ^m. The structure of the ectosomal skeleton is not uniform: in some areas it is possible to distinguish main fibres about 45 ^m thick forming meshes devoid of regularity, about 200-450 [im wide, and within them a secondary reti- culation of fibres 10-20 [im thick forming meshes 70-140 \im wide. All the fibres are cored, not uniformly, by Fig. 84 - Toxochalina multiformis sp. n., the holotype. Scale: 3 cm. : the specimen is cushion-shaped, with prominent lobes apically open. It measures 8 x 4 x cm, and the vents are 3 to 8 mm wide. The colour in life was violet and is now (in the dry state) light brown. The consistency is firm, scarcely elastic. The choanosomal skeleton is a reticulation of spongin fibres 18-47 [j,m thick forming ir- regular meshes 100-380 ]xm wide. This network becomes denser toward the surface, where the meshes measure 35-150 [xm, made by fibres 9-90 [xm thick, which are also present in the form of perforated bands. All the fibres are cored by oxeas, but sparsely. : this specimen has the same form as ; it is only 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 Museo civico di storia naturale Giacomo Doria (Genoa, Italy). Genova : Stab. tipo-litografico P. Pellas Fu L.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectnaturalhistory, booky
