. The Annals and magazine of natural history; zoology, botany, and geology. . Mr. H. J. Cai'ter on new Sponges. Ill state, have had no existence but for their keratose chalinoid fibre (see Bowerbank's illustration, /. c. fig. 2), that I also should propose the generic term " Chalina " instead of " liali- chondria " for this sponge. Let us now turn our attention for a few moments to the anchorate (woodcut, fig. 1, a, h)j whose peculiarities demand special consideration, for it differs considerably from any that have hitherto come under my observation. Thus it is equiended (&
. The Annals and magazine of natural history; zoology, botany, and geology. . Mr. H. J. Cai'ter on new Sponges. Ill state, have had no existence but for their keratose chalinoid fibre (see Bowerbank's illustration, /. c. fig. 2), that I also should propose the generic term " Chalina " instead of " liali- chondria " for this sponge. Let us now turn our attention for a few moments to the anchorate (woodcut, fig. 1, a, h)j whose peculiarities demand special consideration, for it differs considerably from any that have hitherto come under my observation. Thus it is equiended (" equian- chorate"), as stated by Dr. Bower- bank in 1866 {I. c.) ; moreover, when viewed in front, it presents the canoe-shape of this spicule, to which I have applied the generic term of " naviculiform " (fig. 1, a) ; but when viewed laterally (fig. 1, h) the Fip^- 1.—Anchorate of Cha- crumpled appearance which is repre- lin^lfrnata,^v^^t]l^^%- . \ . T-r -D \. ^ 1 ^^^ 2. niuea. a, tront view: b, sented m JJr. Bower bank s iliustra- lateral view. tions {I. c. figs. 3, 4, and 5), but not the " bifurcate terminations " of the anterior arras, although rightly mentioned in both his earlier and later descriptions, which are not illustrated. Examining it more particularly we find that the term " siliceo-membra- nous," used by Dr. Bowerbank, well applies to the whole spicule, and hence its " crumpled appearance ; " while others of the same kind in other sponges which are stiiFer do not yield in this way, but maintain their straight navicular shape when viewed in ail directions. In Chalina jpalmata^ however, the shaft of the anchorate is much thinner towards the ends (" siliceo-membranous") than in the middle, which may account for its bending up there ; it is also alate on both sides throughout, the aliform portion being narrow in the middle third, and then expanded circularly on each side, after the manner of the wing-like
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