125 



the f ree jhiiHo/i^ more rarely both are of' equal leiigth : of the 

 54 specimens that are lying before me, in tiventy five tlie fiised 

 portion was distinotly Jonger than the free, in eigiiteen the free 

 portion was elearly Jonger than the coalesced part and in eJeren 

 specimens both portions seemed to be nearly of equal length. The 

 coalesced portion consists, in adnlt individuals, of 15 to 18 arti- 

 cles, in younger individuals their number is smaller, 14 to 11. 

 As the rostrum appears, in the typical form, in general just as 

 long as the antenna! scales, the antennular peduncle little shorter 

 than the scaphocerite and just as long as the shorter ramus, tlie 

 coalesced portion included, it is obvious that by far the greatest 

 part of the shorter ramus invariably extends beyond the apex of 

 rostrum. 



Antennal peduncle as long as Ist joint of peduncle of an- 

 tennula. The scale that measures about one-fifth the length of 

 the body, shows its greatest width near the base, the length 

 of the scale being in proportion to the greatest width as 25 : 7 ; 

 outcr margin nearly straight, inner margin slightly concave, 

 antero-internal angle obtuse. Mandibular palp two-jointed; in 

 an adult, ova-bearing female from the Svendborg Sund the 

 terminal joint (Fig. 1/) is 0,56 mm. long and 0,125 mm. broad 

 at base, while the basal joint is 0,35 mm. long. The mandibular 

 palp was examined by me in one male and three ova-bearing 

 females from Svendborg Sund, in one ova-bearing female from 

 Denmark and in one adult female from Bergen, Norway : in all 

 these specimens it proved to be two-jointed, but in one ova- 

 bearing female from Svendborg Sund (Fig. \j) the palp was 

 distinctly three-iomÏQ^. The terminal joint was 0,57 mm. long 

 and its form was the same as in the otlier specimens ; the 2'^ 

 joint, a little shorter than the basal joint, was 0,24 mm. long 

 and 0,18 mm. thick. -This appearance of a three-jointed palp is, 

 indeed, a remarkable observation. 



The external maxillipeds extend as far forwards as the anten- 

 nal peduncle or reach with one-third or one-quarter the terminal 

 joint beyond it. 



