. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 518 A. H. SCHELTEMA teriorly in broken diagonals (Fig. 3Q). Mid-dorsally the spicules are arranged nearly parallel to the long axis of the body (Fig. 3S). Total body length averages mm in one population; greatest length is mm (Table VI). The broad trunk averages mm and ranges up to mm in diameter. The posterium is one-third total length, and broad, mm average. Posterium length averages mm, with posterium to trunk length index averaging but ranging widely, from to The oral shield spicul
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 518 A. H. SCHELTEMA teriorly in broken diagonals (Fig. 3Q). Mid-dorsally the spicules are arranged nearly parallel to the long axis of the body (Fig. 3S). Total body length averages mm in one population; greatest length is mm (Table VI). The broad trunk averages mm and ranges up to mm in diameter. The posterium is one-third total length, and broad, mm average. Posterium length averages mm, with posterium to trunk length index averaging but ranging widely, from to The oral shield spicules are small and indistinct beside a medium-size oral shield (Fig. 3T). Holotype: Total length mm; trunk by mm; posterium by mm; index of posterium to trunk length Oral shield by mm; index of oral shield to trunk diameter Spicules. Trunk spicules are very long and often narrow; a long, narrow blade tapers from a distinct waist to an acute or rounded apex (Figs. 5A, 11). The greatest thickness, up to 9 ^m, is at the waist. Sides of the base are nearly parallel or slightly convex; the proximal end is usually triangular. The distinct or faint longitudinal groove seldom runs onto the blade. The blade is bent outward. Faint ridges often run along the base parallel to the longitudinal groove. The greatest length of the trunk spicules is nearly 500 /urn. The trunk bears a few short, thin spicules with sharply pointed, short blades. Spicules from the ventral midline of the trunk are short, with a short blade and distinct waist (Fig. 1 \b2). Spicules from the posterium (d) are similar to those of the trunk. Oral shield spicules (a2) are similar to, but smaller than, those of - 300>jm. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological Laboratory (Woods Hole,
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
