Transactions and proceedings and report of the Philosophical Society of Adelaide, South Australia . ody is from *33 to 43. The ridges have a slight wavy outline owing to the pre-sence of tiny prominences on them and, at first sight, seemto be arranged in a simple spiral, but they are at least on agreat part of the body, apparently along the lateral lines(figs. 18, 19), interrupted in a manner somewhat like that Figs. 10 to 12, tail ends of males. 10, 0. gutturosa. 11, 12, 0. gibsoni. 13 to 15, heads of males. 13, 0. guttu-rosa. 14, 0. lienalis. 15, 0. gibsoni. 16 and 17, heads of f
Transactions and proceedings and report of the Philosophical Society of Adelaide, South Australia . ody is from *33 to 43. The ridges have a slight wavy outline owing to the pre-sence of tiny prominences on them and, at first sight, seemto be arranged in a simple spiral, but they are at least on agreat part of the body, apparently along the lateral lines(figs. 18, 19), interrupted in a manner somewhat like that Figs. 10 to 12, tail ends of males. 10, 0. gutturosa. 11, 12, 0. gibsoni. 13 to 15, heads of males. 13, 0. guttu-rosa. 14, 0. lienalis. 15, 0. gibsoni. 16 and 17, heads of females16, 0. gutturosa. 17, 0. lienalis. 18 and 19, parts of body offemale 0. gutturosa. 18, body width, 270 mm. 19, body width,120 mm. 20, small spicule of 0. gutturosa. 21, scale to whichfigs. 10 to 17, 19, 20 were drawn. 22, scale for fig. 18. 236 figured (probably diagrammatically) by Joan for 0. bovis(Argentine material), and exactly like that indicated bvNeumann (1910, p. 275) for O. gutturosa. The arrangementof the ridges varies, then, according to the position fromwhich they are Figs. 23 to 27, views of side of females (optical section) toshow thickness of cuticle, height of ridges, striae, etc.; all figs,drawn bo scale indicated in fig. 28. 23, 0. fasciata (diameter ofbody a1 place figured, 41 mm.). 24, 0. <jihsni 050 mm.). 25,0. gutturosa (230 mm.). 26, 0. gutturosa (120 mm.). 27, (20 mm.); r; ridges. 237 The outer layer of the cuticle on the greater part of thefemale worm measures about 10 /x in thickness between theridges. The underlying region is about 20 /x thick and issubdivided between each pair of ridges, usually into three(occasionally four) ring-like segments and there is one beloweach ridge (figs. 25, 26). From the apex of one ridge tothat of the next one there are, then, three complete and twohalf rings of the under-cuticle, just as figured by there appear four striae between the ridges. Joan () figures eight such se
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectscience, bookyear1878
