14 



In 191 3 Stanley Kemp published, based on about 4 specimens, a supplement to my 

 description of the mutilated specimen of S. Challengeri. He was able to describe and figure 

 the eyes, and it may be added that they are somewhat large, seen from above (fig. \b') about 

 as long as the inner margin of the distal joint of the stalk and very considerably broader than 

 the distal part of this joint. His specimens differed somewhat from the 'Challenger' type in the 

 shape and direction of the rostrum, but I have found some variation in this process, and add 

 a drawing (fig. \d) showing its most common shape in the adults. His remarks on two joints 

 in the second pair of ma.xillipeds is correct. Finally he investigated the number and position 

 of the photophores ; he found the 1 1 7 organs enumerated by me, and it must be added that 

 he pointed out that the organs on the side of the carapace turn inwards, and according to my 

 observation there are generally 4, sometimes 5 organs in the line on each side of the carapace. 

 Furthermore he found 18 organs on appendages — eye-stalks and the two posterior pairs of 

 thoracic legs — missing in my type, finally in all 4 organs on the three posterior abdominal 

 segments and not observed — probably overlooked — by me. I may here correct a statement 

 in my paper as to the organs on first pair of thoracic legs; each leg has, as stated, 3 organs, 

 but one is placed pro.ximally on the third joint, the two others near each end of fourth joint. 

 As three pairs of appendages have never been examined, it may be added here that third 

 pair of maxillipeds have 4 organs, each placed distally on second to fifth joints; each leg ot 

 second and third thoracic pair has 3 organs, viz. 2 on the lower side of third joint, respectively 

 near the base and at the distal end, and a single organ distally on fourth joint. These three 

 pairs of appendages have consequently together 20 organs, which added to the number of 

 organs already known give the result that 159 organs, or, when the sides of the carapace "have 

 in all 9 or 10 organs, 160 or 161 organs are found in this species. — It may otherwise be 

 sufficient to refer the zoologist to my earlier description and drawings of S. Challengeri as to 

 all external features excepting the third maxillipeds and differences between the two sexes, 

 which are entirely unknown. 



Third maxillipeds are not inconsiderably shorter than third pair of legs ; the terminal 

 joint is divided into four sub-joints, the first considerably shorter than the second which is 

 somewhat shorter than the third and a little shorter than the fourth. 



The antennulae show strong sexual difference. Third peduncular joint in the female is 

 robust and distinctly deeper than broad; seen from the side and slightly from below (fig. 4^) 

 its distal third has the margins nearly parallel, and this part is a little less deep than the 

 proximal half. In the male the third joint is scarcely as long as in the female of the same size 

 but much deeper, and its distal third is below produced into a large triangular part (fig. \c), 

 the distal lower corner of which is a triangular, acute process directed downwards and much 

 forwards; in one specimen the front margin of the produced or expanded part has a smaller 

 triangular tooth above the process mentioned (fig. \d), while in other specimens this tooth is 

 rudimentary or wanting (fig. 4^). — The lower antennular flagellum is in the female simple as 

 usual, in the male (fig. 4^) its clasping organ is strongly built and characteristic. The upper 

 process from its first joint is seemingly nearly divided into two portions, the proximal one being 

 moderately thick and a little curved with the convex margin upwards, while the distal portion, 



