Geological magazine . distance between the annuU is 2 annuh themselves measure as much, and the furrows between are deeplymarked. This specimen is preserved in an indurated sandstone, and theimpression is better marked anteriorly as regards annulation, having a lessflattened appearance. At the posterior end the annuli are not so far there are five to a centimetre, and each annulus is equidistant,except in one case, where it is 3 mm. distant from the next. For a great partthe impression is covered by the matrix, which it is difficult to remove withadvantage. Where it is
Geological magazine . distance between the annuU is 2 annuh themselves measure as much, and the furrows between are deeplymarked. This specimen is preserved in an indurated sandstone, and theimpression is better marked anteriorly as regards annulation, having a lessflattened appearance. At the posterior end the annuli are not so far there are five to a centimetre, and each annulus is equidistant,except in one case, where it is 3 mm. distant from the next. For a great partthe impression is covered by the matrix, which it is difficult to remove withadvantage. Where it is uncovered elsewhere a black slickenside-like coveringobscures the seginentation. Surface. The anterior portion is an inside cast of the surface, except alongthe margin, and bears no papillae. The posterior portion is covered by a blackslimy covering, which may originally have been slimy bitumen, containing Fossil Myriopods from the Middle Coal-measures of Sparth Bottoms,Rochdale, Lancashire : Geol. Mag., 1912, p. o E. 8. Simpson—Laterite in Western Australia. 399 juices exuded by the worm, in this ease black. Underneath this, about thecentre, are indications of the polygonal areas found anteriorly in few papillae are present here. Otherwise this specimen is very similar insurface characters to the type, specimen A. Apxxndages. There are very few indications of appendages in this specimen,and they are similar in character to those in specimen A, but are only distincton one side, the left, where they are distant. They are notopodial setae withouta doubt, but though only seen on one side there is no trace of neuropodialcrotchets as in specimen A, and they may both therefore be regarded as viewedfrom the dorsal aspect. Arcbaeenicola, not. gen. An annulated Polychaete, with an impression of the cuticle bearingannuli of two sizes, possibly forming segments. The cuticularsurface is covered in the type by epidermal papillae, in the co-typeby polygonal areas between t
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectgeology, bookyear1864
