25 



they seem to belong to this species, but the spines on the lower surface of the 6 ,h somite are 

 larger than in the adult, reaching to the posterior extremity of the lateral margins. 



The 7 young specimens from Stat. 41 agree with those from Stat. 37 as regards the 

 lenoth of the spines on the lower surface of the 6 th somite; the largest is about 17 mm. long, 

 the rest are much smaller. 



The young male from Stat. 47 measures 19 mm., the spines on the lower surface of 

 the 6 th somite are already somewhat shorter than in the preceding younger specimens. The 

 eo-cr-bearino- female from Stat. 105 is 18 or 19 mm. long, the spines on the lower surface of 

 the ó th somite are already small, like in the adult. 



The young sample from Stat. 109 measures hardly 15 mm., the carapace is rather much 

 convex dorsally; it is no doubt a male, because the carinae are wanting. 



The ova-bearing specimen from Stat. 114' is only 11 mm. long, the ova, however, have 

 the same size as in the adult female; the carinae on the carapace are well developed. 



The young male from Stat. 133 measures 18,5 mm., the male from Stat. 141 24 mm., 

 in both the spines on the 6 th somite are already nearly as small as in the adult. The young 

 specimen from Stat. 166 is 13 mm. long; the spines on the 6 th somite are large and reach 

 almost to the posterior extremity of the lateral margins; this specimen differs also from the 

 others by the outer orbital angle being rather acute, not rounded (Fig. 7 x), though a spine 

 does not occur, and by the anterior margin of the carapace running from the outer orbital 

 angle straight and vertically downward. 



The young male from Ambon is about 19 mm. long, spines of the 6 th somite already 

 nearly as in the adult. 



The young specimen from Stat. 204 is 1 2 1 /, mm. long. 



The young specimen from Stat. 2S5 measures 13 mm. The carapace is not carinate, 

 the appendix masculina on the 2 nd pleopods rudimentary. 



The young male from Stat. 296 measures r.2 1 /,, mm. Carapace not carinate, appendix 

 masculina on 2 nd pleopods already present. There are only 2 pairs of spines on the upper 

 surface of the telson, behind the anterior pair only one pair occurs, in the middle. 



The 4 young specimens from Stat. 313 are all males, in each the 2 Dd pleopods bear an 

 appendix masculina. The youngest is 12 mm. long. The dactylus of the legs of the i st pair 

 presents still only 2 spines, in this specimen, on the proximal half of its outer margin and 3 

 spines occur on the outer margin of the palm ; the 2 spines at the distal end of the carpus 

 are already present, but there is only one on the outer margin. Merus little more than twice 

 as long as the carpus, 0,96 mm. long and 0,27 mm. broad, not yet 4-times as long as wide 

 and with 2 spines on the distal half; ischium and basipodite like in the adult. The dactylus of 

 the legs of the 3 rd pair is still shorter than the propodus, only 0,34 mm. long and 8-times as 

 long as wide in the middle; the 4 setae at the distal extremity are already present. Propodus 

 one and a half as long as the carpus, 0,42 mm. long and 0,09 mm. broad, its lower margin 

 still only with 2 setae, but the two at the far end are already developed and the longer extends 

 almost to the truncate tip of the dactylus. Carpus one-fourth of the merus, armed and shaped 

 like in the adult. Merus 4,6-times as long as wide, with 5 spines on the lower margin, ischium 



SIBOGA-EXPED1TIK XXXIX a 3 . 4 



