Discovery reports (1962) Discovery reports discoveryreports31inst Year: 1962 THE APPENDAGES, THEIR INTERRELATION AND FUNCTION 3>7 maxilla, it bears no endites and no setae. The part of the limb which Skogsberg considered as the endopod bears a single long brush-seta extending forward towards the mid-line of the animal (Figs. 7 and 12). The exopod of the appendage (Figs. 7, 10 and 12) has four articles, the proximal being the longest, the distal, as in the case of the maxilla, being the shortest. In the female, there are two distal claws and a seta, similar to those of the maxilla, but in
Discovery reports (1962) Discovery reports discoveryreports31inst Year: 1962 THE APPENDAGES, THEIR INTERRELATION AND FUNCTION 3>7 maxilla, it bears no endites and no setae. The part of the limb which Skogsberg considered as the endopod bears a single long brush-seta extending forward towards the mid-line of the animal (Figs. 7 and 12). The exopod of the appendage (Figs. 7, 10 and 12) has four articles, the proximal being the longest, the distal, as in the case of the maxilla, being the shortest. In the female, there are two distal claws and a seta, similar to those of the maxilla, but in the male there are three extremely long natatory setae, which can curve upwards as far as the hinge-line of the carapace. Further setae on the exopod may be described as similar to those of the maxilla. Projecting ventrally there is a single apical seta on the inner face of the protopod in series with two further setae on the first article and one on the third article. Projecting towards the mid-line from the inner face are three setae on the first article, one on the second and one on the third. There is only one seta extending outwards from the limb, on the first article of the exopod. In addition, however, there are further setae (not represented) on the maxilla—a dorsal distal seta on the first article of the exopod and a dorsal medial seta on the third article. Movement of the limb would seem to resolve into an antero-posterior movement of the protopod and a dorso-ventral extension and flexure of the exopod. The ventral flexure of the limb may not be as great as that of the maxilla but the dorsal extension is greater. The epipods of these appendages beat in conjunction with those of the maxillae. It is possible that the limbs themselves could take part in collection of food, but the enormously elongate apical setae in the male are strongly suggestive of some function of locomotion in this sex. side of the only setae Second trunk-limbs (Figs. 2 & 13) The second trunk-limb
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