. Fig. 12. C. borealis antipoda. A, female right first trunk limb from inside; B, apex of the same appendage in male. ep, epipod; ex, exopod; p, protopod. With its wide range of antero-posterior movement and ventrally curved terminal claws, the elongate exopod of the maxillae may play some part in collection of food. The short endopods, with posteriorly curving claws, probably play a main role in food transport in conjunction with the maxillulary palps. The endites, as described above, are very poorly developed. Their long slender brush-setae may assist in forward transport of fine food-materi
. Fig. 12. C. borealis antipoda. A, female right first trunk limb from inside; B, apex of the same appendage in male. ep, epipod; ex, exopod; p, protopod. With its wide range of antero-posterior movement and ventrally curved terminal claws, the elongate exopod of the maxillae may play some part in collection of food. The short endopods, with posteriorly curving claws, probably play a main role in food transport in conjunction with the maxillulary palps. The endites, as described above, are very poorly developed. Their long slender brush-setae may assist in forward transport of fine food-material, but can be of little use for manipula- tion of larger material. Marginal setae of the exopod may aid retention of food-material. The epipod of this appendage, in conjunction with that of the first trunk-limb, undoubtedly creates a respiratory water-current through the carapace in a manner similar to that in Cypridopsis (= Piotiocypris vidua) and in Cypridina described by Graham Cannon (1926, 1931). Miiller (1894) had in fact observed this current in Conchoecia experimentally with the aid of carmine particles. He also described how the epipods beat continuously and independently of other movements of the limbs. First trunk-limbs The first trunk-limbs are uniramous, jointed and pediform. The protopod bears a well-developed epipod. They show sexual dimorphism. Though very similar in general appearance to the maxillae, as pointed out by Skogsberg (1920), their endopods are even less well developed. The protopod of each arises immediately behind that of the maxilla so that it extends ventrally below the posterior extreme of the isthmus linking the body of the animal with the carapace. It bears an epipod similar to that of the maxilla. As might be expected from its position in relation to the protopod of the
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Keywords: ., bookcentury1900, booksubjectocean, booksubjectscientificexpediti
