28 



anteriorly in a small tooth, but in the female it ends abruptly, the carina being somewhat 

 eroded. In Fig. i of Bate's work the abdomen has been figured quite inaccurately; so e. g. 

 the posterior granulated part of the i st tergum appears in this figure just as long as that of 

 the 2 nd , the posterior margin of the 3 rd , 4 th and 5" 1 terga runs differently, being nearly straight 

 at either side of the middle, while in the figure of the Challenger work each half appears 

 S-like sinuate; the 6 th tergum has also another form, for it reaches laterally not so much 

 forward as in that figure, appearing therefore laterally shorter in proportion to its width. In 

 Figure 1 the telson appears smooth above. As has already been remarked, the male from 

 Stat. 38 carries on the anterior elevated part, somewhat behind the anterior margin, a median 

 row of 4 acute granules of unequal size, in the female only 3, of which the posterior is obtuse 

 and larger than the preceding. This elevated portion is bordered posteriorly by acute granules; 

 the lateral margins of the telson are granular, the last third excepted. On the anterior half a 

 ridge with sharp granules runs on each side near the lateral margin ; two other sublateral 

 ridges, converging backward to the pointed tip, run on the two posterior thirds of the telson, 

 nearer to the middle line, and are also provided with sharp granules that are directed back- 

 ward; between these ridges, like also anteriorly, the upper surface appears moreover granular 

 and there is a narrow median groove that reaches from the elevated part of the telson as far 

 backward as the inner sublateral ridges. In the female these granules are less conspicuous. 

 Just behind the elevated part the telson is covered with hair. 



The abdominal pleura are quite well figured in Fig. 1 P of the Challenger Report, 

 their form is different from those of Pol. typhlops Heller, as is obvious when comparing Fig. 

 4a of Plate I of this work with Fig. 2a of Plate X of the "Illustrations". The principal differences 

 are the following. The anterior margin of the 2 nd pleura is straight and the anterior extremity 

 rather sharp in Pol. baccatus, while in Pol. typhlops the latter is more obtuse and the anterior 

 margin slightly convex ; in Pol. typhlops the outer surface is a little concave and smooth, though 

 hairy, in the middle and this concave portion is surrounded, especially posteriorly, by small granules; 

 in Pol. baccatus, however, the outer surface is slightly convex transversely, the greater upper half 

 is granular, but not hairy, and it carries in the middle a granular ridge, not far from and parallel 

 with the posterior margin. In our male of Pol . baccatus the anterior margin of the 2 nd pleura 

 is a little granular near the tip and the lower edge is also finely serrate posteriorly. In Pol. 

 typhlops the 3 rd to 5 th pleura are obtusely rounded inferiorly and their posterior margin is 

 regularly convex; they carry nearly in the middle a prominent, granulated ridge that does not 

 reach to the lower end, on either side of which the surface is hairy and the latter is covered 

 with granules between this ridge and the posterior margin. In Pol. baccatus, however, both 

 the anterior and the posterior margin are S-like waved and unite so that they form below a 

 distinct angle with one another; the glabrous outer surface of these pleura is somewhat elevated 

 on *its posterior half and here granulated, but it is smooth anteriorly and inferiorly. In Pol. 

 typhlops the pointed teeth into which the median carinae of the 2 nd — 5 ,h terga culminate 

 anteriorly, increase slightly in size in posterior succession, while in Pol. baccatus the tooth of 

 the 5* tergum is almost rudimentary. 



The i st joint of the antennular peduncle appears concave at the dorsal side and carries 



