72 



The l st somite óf the abdomen is smooth, apparently not sculptured. The terga of the 

 2 nd — 5" 1 somites are transversely furrowed, like in other species, at either side of the middle 

 line, so that they are divided into a larger anterior and a smaller posterior part; both the 

 anterior and the posterior part are cut each in 4 or 5, respectively 5 or 6, areolae by secondary 

 oblicpie furrows, and, while the areolae of the anterior part increase in size towards the pleura, 

 those of the posterior become gradually smaller laterally. The transverse main furrow is 

 continued on to the pleura, dividing each of them into a larger, slightly concave, unsculptured, 

 anterior and a smaller, areolate, posterior part. According to Dana in the adult species the 

 anterior half of the 2 nd and 3 rd abdominal segments is but faintly divided into a few areolets, 

 so that we may conclude that in young specimens the areolation on the anterior half of these 

 segments is more developed. The posterior margin of the first four terga presents, in the 

 middle, a small, narrow notch, which is a little deeper on the 2 nd and y d terga than on the 

 i st and 4 th ; the posterior border of the 5 th bears a small, sharp tooth in the middle. The ridge 

 or carina in the middle of the 2 nd — 5 th terga is quite obtuse, their lobulation anteriorly is still 

 indistinct and they are rounded transversely, like also longitudinally ; as in Scyll. Martensii, 

 the carina of the 3 rd tergum is distin ctly more prominent than those of the other ones. 



In this young individual the distal squame of the outer antennae reaches still beyond 

 the extremity of the proximal squame, while, according to Dana, the latter extends in adult 

 specimens beyond the distal squame. The outer margin of the proximal squame carries a single, 

 acute tooth and one observes, as in Dana's figure 'ja, a tracé of a second behind it ; in our 

 specimen both teeth are situated a little nearer to the extremity of the squame than in 

 Fig. 70, that may be owing also to its younger age. The inner border of the proximal squame 

 bears one acute tooth, which is foliowed by three or four much smaller ones. The distal squame 

 presents 6 lobes, 4 on the anterior margin, of which the i st is obliquely truncate, the 2" d , 3" 1 

 and 4 tU obtuse and rounded, moreover 2 sharp lobes on the inner border; the longitudinal 

 ridge on the upper surface is smooth. 



The sternum agrees with Dana's figure, the notch on the anterior extremity is, however, 

 sharper; the sternum is little concave. 



The appendages of the 2 nd — 5 th abdominal somites are biramous, slender. 



The ground-colour is pale bluish, marbled with white or yellow, as e. g. the median 

 parts of the abdominal terga, the median teeth and the lateral carinae of the carapace, like 

 also the greater part of the antennae. 



This species bears some resemblance to Scyll. Martensii Pfeffer and still more to Scyll . 

 gièóerosus (de Man). Both in Martensii and in vitiensis the third abdominal tergum is the 

 most prominent, but Scyll. Martensii differs in most other characters much from Dana's species, 

 so by the strongly developed sculpture of carapace and abdomen, by the cardiac region 

 being more prominent than the gastric, while in Scyll. vitiensis the tooth on the middle of the 

 gastric region is the most prominent of all, by the less slender shape of the propodite of the 

 2 nd pair etc. 



The thoracic legs show the same form in Scyll. vitiensis and in Scyll. giööerosus, but 

 in the latter the frontal tooth is lareer and a rounded tooth or tubercle occurs between it and 



