. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. PROCHAETODERMATIDAE—APLACOPHORA 501 -300/jm. (J V7 FIGURE 6. Upper left: spicules of Prochaetoderma raduliferum (Kowalevsky 1901) redrawn from type figure (pi. 10, Fig. 3); scale of original drawings not certain, scale used here from Salvini-Plawen (1972, Fig. 12 d, f). Lower rows: spicules of Prochaetoderma yongei n. sp. paratype no. 1, 1470 m, North American Basin (type locality). Spicules a-f from body regions indicated on figured specimen, above right; spicule below specimen, lateral view of a trunk spicule showing blade
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. PROCHAETODERMATIDAE—APLACOPHORA 501 -300/jm. (J V7 FIGURE 6. Upper left: spicules of Prochaetoderma raduliferum (Kowalevsky 1901) redrawn from type figure (pi. 10, Fig. 3); scale of original drawings not certain, scale used here from Salvini-Plawen (1972, Fig. 12 d, f). Lower rows: spicules of Prochaetoderma yongei n. sp. paratype no. 1, 1470 m, North American Basin (type locality). Spicules a-f from body regions indicated on figured specimen, above right; spicule below specimen, lateral view of a trunk spicule showing blade slightly offset outwards from base (arrowhead). Prochaetoderma raduliferum. Salvini-Plawen, 1977, Vie Milieu 27: 56-63, Figs. 3-5; Bull. Mus. Nat. Hist. Nat., Paris (ser. 3), 447 (Zool. 310): 417, Table I. Distribution: Sea of Marmara; eastern and western Mediterranean; 54-2415 m. Prochaetoderma vongei n. sp. Figs. 1, 3A-C, 4A-C, 6, 7, 8, 14 y'-y3; Tables I, III, IV, V, VII Prochaetoderma sp. Grassle, 1977, Nature 265: 618-619, Table 2. Prochaetoderma sp. Scheltema, 1978, Malacologia 17, Figs. 1A, 3B, 5C. Prochaetoderma sp. y. Scheltema, 1981, Malacologia 20, Figs. 2E-G, 3D-H, K, 7D- F, 11A-C (non 7A-C, caption in error). Prochaetoderma sp. B. Scheltema, 1985, in L. Laubier and C. Monniot, eds., Peuple- ments Profonds du Golfe de Gascogne: Campagnes BIOGAS, IFREMER, Brest, pp. 391-396, Tables 1,2. Diagnosis: Translucent, slender; spicules flat-lying, parallel to long axis of body; less than 3 mm long, posterium 'A total length; posteroventral thickened cuticular patch present; oral shield small, oral shield spicules not distinct; spicules straight, sharply keeled, indented at waist, blade with convex sides, base flared proximally, greatest length 252 /urn; greatest jaw length 365 ^m; radula tooth length up to 90 /mi; central radula plate short and relatively broad with ends directed posteriorly, greatest length 26 /xm. This species is named in honor of Sir Maurice Yonge, who
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
