Catalogue of the fossil sponges in the Geological Department of the British Museum (Natural History) BHL12327732, Mary Suft, 1883

Catalogue of the fossil sponges in the geological department of the british museum (natural history). With descriptions of new and little-known species. (illustrated by 38 lithographic plates. ) bygeorge jennings hinde. Published by british museum (natural history). Illustration and lithography by mary suft and g. M. Herschell. The following descriptive text has been copied from this book and is in the public domain. Plate xiii fig. 1. Hindia fibrosa, roemer, sp. The interior of a fractured specimen, showing the radial disposition of the canals. Natural size. The sponge has been silicified, and the canals now appear as minute straight rods. From silurian strata of the niagara group in perry county, tennessee (see page 57) fig. 1 a. The same. Portion of the interior of another silicified specimen from the same locality. Enlarged eight times. The rods represent the infilled canals, and the tubercular projections on them are produced by the siliceous infilling of the interspaces between the spicular arms of the interior skeleton. Fig. 1 b. The same. Portion of the spicular skeleton of the interior of a specimen from silurian strata of the lower helderberg group at dalhousie, new brunswick. Enlarged seventy-six times. Drawn from a transparent microscopic section by means of the camera lucida. Fig. 2. Siphonia tulipa, zitt. Natural size. From the upper green sand at warminster, wiltshire (see page 64) fig. 2 a. The same. A vertical median section of another specimen from warminster, showing the cloaca, the course of the vertical canals which open into it, and traces of the radial canals which extend from the surface towards the centre of the sponge. Natural size. Fig. 2 b. The same. Transverse section of a specimen taken from the lower portion of the body, immediately below the cloacal tube, showing sections of the larger vertical canals and the smaller radial canals. Natural size. Fig. 2 c. The same. Portion of the interior spicular skeleton of 2 a. Enlarged thirty-two times. Drawn from a transparent section. The small square to the right of the figure represents its natural size. Fig. 3. Siphonia ficus, goldfuss. Natural size. From the grey chalk at dover (see page 65) fig. 3a. The same. Portion of the outer surface of the same specimen, enlarged eight times, showing the apertures of the radial canals and traces of the spicular skeleton. Fig. 4. Siphonia königi, mant. Sp. Natural size. From the upper chalk at flamborough, yorkshire (see page 65) fig. 4a. The same. Portion of the outer surface of the same specimen, enlarged thirty-two times, showing the fragmentary heads of spicules of the dermal layer. Date: 1883.