. Fig. ic. Third trawling survey; station positions October to April 1931-2. Nototheniidae and Rajidae presented special difficulties which were only cleared up in the course of the preparation of Norman's report years afterwards. The invertebrates were more difficult owing to the great bulk of many of the catches. Quantities of previously preserved species were estimated and noted when possible, and all or a noted pro- portion of the others preserved; but the bulk of the catch and masses of broken sponges, coralline polyzoa, large Scyphomedusae, etc., frequently made it impossible to sort the
. Fig. ic. Third trawling survey; station positions October to April 1931-2. Nototheniidae and Rajidae presented special difficulties which were only cleared up in the course of the preparation of Norman's report years afterwards. The invertebrates were more difficult owing to the great bulk of many of the catches. Quantities of previously preserved species were estimated and noted when possible, and all or a noted pro- portion of the others preserved; but the bulk of the catch and masses of broken sponges, coralline polyzoa, large Scyphomedusae, etc., frequently made it impossible to sort the catch adequately m the limited time available.
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Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti
