. Cassell's natural history. Animals; Animal behavior. Fig. 32, â flalx-lUform Altliough its ravages had gone on for centuries, depth from which Bathynomus was obtained, the eyes are greatly developed, each being made up of about 4,000 square facets, and instead of being placed on the upper surface of the head, as in all known wandermg Cynwthoidce, tliey are placed below the frontal border of the head at the base of the antennie. Alphonse Milne-Edwards places Bathynontns in a new family of the division Cymo- thoidct, named Cymothoid(e branchiferie. In Tanais (Fig. 32)âan abeirant form of Isopo
. Cassell's natural history. Animals; Animal behavior. Fig. 32, â flalx-lUform Altliough its ravages had gone on for centuries, depth from which Bathynomus was obtained, the eyes are greatly developed, each being made up of about 4,000 square facets, and instead of being placed on the upper surface of the head, as in all known wandermg Cynwthoidce, tliey are placed below the frontal border of the head at the base of the antennie. Alphonse Milne-Edwards places Bathynontns in a new family of the division Cymo- thoidct, named Cymothoid(e branchiferie. In Tanais (Fig. 32)âan abeirant form of Isopodâthe first pair of legs are converteil into chelae, the six other paii-s being simple, as in other Isopods of the head with the first segments of the body, give it a very Macrouran aspect. In some the eyes are prominent, and almost pedunculated. This group also presents many points of affinity with the Am PHI POD A. To the Isopodous division belongs the Lim- iwria terebrans, or the " Gribble," as it is commonly called by fishermen. It is a most destructive creature, attacking all woodwork below tide-mark, the only wood which it cannot destroy being teak, it was only in 1811 that it was discovered and described by Dr. Leach. The Asellus aquaticus is a very abundant form, inhabiting fresh-water ponds and ditches. The eggs and the young are retained in the pouch of the mother for about six weeks; probably half this period elapses before the young quits the egg. Asellus does not exceed six lines in length, and little more than half a line in breadth. It feeds upon vegetable matter exclusively. The leaves of the beech in decay are preferred, and in the parts of the pond where these are most aliundant, there the Asellus is most numerous. The animal does not generally swim, it runs freely and expeditiously over the decaying leaves. In Arcturus the young are carried by the parent in rows upon the long joints of its antennse, the mother remaining in a nearly erect position
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Keywords: ., bookcentury1800, bookdecade1890, booksubjecta, booksubjectanimals
