. a be Fig. 15. Callyspongia fusifera (Thiele). Falkland Islands specimen. «, dermal skeleton, x 100; b, main skeleton, x 100; c, oxeote, x 400; ec/i, echinating tufts of spicules seen in section. is not identical. On the other hand, the arrangement of the dermal skeleton and the shape of the spicules diff^er considerably in the two specimens. Through the kindness of Dr W. Arndt, I have been able to examine a piece of the holotype and have found that the dermal skeleton is a close-meshed reticulation showing an incipient differentia- tion into primary and secondary meshes. The main skeleton is
. a be Fig. 15. Callyspongia fusifera (Thiele). Falkland Islands specimen. «, dermal skeleton, x 100; b, main skeleton, x 100; c, oxeote, x 400; ec/i, echinating tufts of spicules seen in section. is not identical. On the other hand, the arrangement of the dermal skeleton and the shape of the spicules diff^er considerably in the two specimens. Through the kindness of Dr W. Arndt, I have been able to examine a piece of the holotype and have found that the dermal skeleton is a close-meshed reticulation showing an incipient differentia- tion into primary and secondary meshes. The main skeleton is a coarse and large-meshed reticulation with multispicular primary fibres and unispicular secondary fibres. The spicules are o-o6 mm. long and rounded at the ends, although not forming pure strongyla. The dermal skeleton of the present specimen does not show so marked a differentiation into primary and secondary fibres even as the holotype. The main skeleton is a close-meshed reticulation with bispicular primary fibres and unispicular secondary fibres, and the dermal skeleton is echinated at the nodes by tufts of spicules projecting from the ends of the primary fibres of the main skeleton. The spicules are
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Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti
