. Fig. I. Apical system of Notechinus marlonis, , xq. suranal plate is, except in the small specimens, from a size of ca. 14 mm. , usually separated from the edge of the periproct by a series of small plates (Fig. i a, b). It usually shows some concentric striations. The small plates round the anal opening are raised into small papillae. The peristome, as typical of the genus, is wholly devoid of plates outside or inside the buccal plates; some few, very slender bihamate spicules are found in the distal part. Spines rather slender, not exceeding a length oica. 10 mm., even in the larg
. Fig. I. Apical system of Notechinus marlonis, , xq. suranal plate is, except in the small specimens, from a size of ca. 14 mm. , usually separated from the edge of the periproct by a series of small plates (Fig. i a, b). It usually shows some concentric striations. The small plates round the anal opening are raised into small papillae. The peristome, as typical of the genus, is wholly devoid of plates outside or inside the buccal plates; some few, very slender bihamate spicules are found in the distal part. Spines rather slender, not exceeding a length oica. 10 mm., even in the largest speci- mens ; those around the peristome slightly curved. Secondary spines slender, but, as typical of the genus, not pointed. Pedicellariae as typical of the genus. The large globi- ferous pedicellariae may have up to three teeth along either side of the blade; but equally often there are only one or two. The small globiferous pedicellariae with one tooth on either side (Plate IX, figs. 2, 3). Both sorts of globiferous pedicellariae on the whole rather numerous. Tridentate pedicellariae exceedingly scarce, often totally lacking. They
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Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti
