. Discovery reports. Discovery (Ship); Scientific expeditions. 304 DISCOVERY REPORTS the limb arrangement. Figs, i and 2 are detailed drawings based on the lateral and ventral photographs. After as complete a study of the whole specimen as I could make, I embedded it in paraffin wax and sectioned it parasagittally down to the middle plane. The remaining half was dissolved out of the wax by xylol and transferred back to spirit. In this way I have obtained a series of sections from which it will be possible to study, to a certain extent, the internal anatomy. But, more important, in the remainin
. Discovery reports. Discovery (Ship); Scientific expeditions. 304 DISCOVERY REPORTS the limb arrangement. Figs, i and 2 are detailed drawings based on the lateral and ventral photographs. After as complete a study of the whole specimen as I could make, I embedded it in paraffin wax and sectioned it parasagittally down to the middle plane. The remaining half was dissolved out of the wax by xylol and transferred back to spirit. In this way I have obtained a series of sections from which it will be possible to study, to a certain extent, the internal anatomy. But, more important, in the remaining whole half, I was able to view the limbs from the median aspect, and without this view I maintain that in most Crustacea it would be useless to speculate as to the method of functioning of the limbs. I have not drawn a figure of this view as the overlapping of the setae would have obscured the essential details. In Fig. 4 I have drawn a series of figures showing separately the median aspects of the mouth parts, the first, second and part of the third. Fig. I. Nebaliopsis iypica. Side view. trunk limbs. This series can be compared with the corresponding figures of Nebalia which I have already published (1927, p. 361, Text-fig. 4). The antennules, antennae and mandibles have been described in sufficient detail by Thiele (1904) and I have nothing further to add beyond what I have already described. The maxillule, as Thiele states (1904, p. 21), is two-jointed, the palp being reduced to a small stump. This is not, however, blunt as in Thiele's figure (PI. 3, fig. 48) but terminates in a feathered spine about as long as the palp itself (Fig. 3). The arrangement of the two endites shows a similarity to that of other Malacostraca but has been dis- torted by the flattening out of the region immediately behind the mouth. In Nebalia the lower lip is deeply cleft into two marked paragnaths. The setae of the proximal endite curve round behind the latter and point directly into the mouth
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