58 



22 mm. long and 7 1 / 2 mm. broad, while the propodus is 10 mm. long and ^ l L mm. broad; in 

 the male, long 23 cm., of Pamtl. omatus (Fabr.) from Stat. 71 (PI. II, fig. yc) these numbers, 

 however, are, in the same succession, 12 mm. and 9 mm,, 19 mm. and 7 1 /., mm., 7 1 /,, mm. and 

 5 mm. (Confer also the other numbers at this page). In the adult male from Sinabang-Bay the 

 exopodite of the penultimate or 2 nd pair of maxillipeds, which is but a little, viz. l / r shorter 

 than the merus-joint, appears truncate at the distal extremity (PI. II, fig. 7) and bears a short 

 flagellum, which is 2 1 /, mm. long and i l / 2 mm. broad; this flagellum, that just reaches beyond 

 the merus, has a wine-red colour, appears not articulate and is fringed with some brown hairs 

 along its margins. Abdominal somites quite smooth, without a tracé of transverse furrows. The 

 acute spines with which the posterior margin of the 6 th somite is armed, are longer and more 

 prominent than in Gruvel's figure. 



The other specimen from Simalur, which is 280 mm. long, is still half soft, owing, no 

 doubt, to exuviation, but it apparently agrees with the described male. 



The largest of the 18 specimens that were collected by the "Siboga", is an adult male 

 from Ternate, long 310 mm. from the anterior margin of the carapace to the end of the 

 telson ; the carapace is 120 mm. long, the abdomen 190 mm. It fully agrees with the male 

 from Sinabang-Bay, some of the smaller spinules of the carapace are, however, partly worn 

 off, owing to the old age of this specimen, so e. g. those that are situated just in front of the 

 transverse furrow near the posterior margin of the carapace. The general pattern of the colo- 

 ration is quite the same, but the white stripe by which the broad, dark-bluish black band on 

 the posterior margin of the abdominal somites and pleura is traversed, appears in the male 

 from Ternate 0,75 mm. broad, in the male from Sinabang-Bay 1,4 to 1,5 mm., appearing 

 here distinctly broader. The large patches, marbled with white, on the branchial regions and 

 the smaller ones just in front of the transverse furrow near the posterior margin of the carapace 

 are, in the male from Ternate, dark-bluish black, in the male from Sinabang-Bay pale brick- 

 colored, but this difference may, in my opinion, be explained by a different action of the spirits. 

 The small, hairy flagellum of the exopodite of the 2 nd pair of maxillipeds is 3 1 /,, mm. long and 

 i 3 / 4 nim. broad, it just reaches beyond the distal extremity of the merus. The external maxillipeds 

 extend by their terminal joint beyond the anterior margin of the epistome ; measured in the middle, 

 the ischium appears 21 1 /., mm. long and i2 3 / 4 mm. broad, the merus-joint 29Y0 mm. long and 

 g l Lmm. wide, the propodus long 13 mm. and 6 3 / 4 mm. broad. The antennular peduncle extends 

 by the terminal joint and one-fourth of the 2 nd beyond the peduncle of the outer antennae. 



The female from Stat. 131 is 152 mm. long, the carapace measuring 54 mm., little 

 more than one-third of the whole length. The supra'-orbital spines are broken off and the antennal 

 flagella also. The beautiful characteristic coloration has partly changed, the blue ground-colour 

 of the thoracic legs has become isabel and likewise, except the 2 or 3 first ones, the blue on 

 the posterior border of the abdominal somites and on the calcareous basal part of the caudal 

 fan, as also of the inner antennae. Those patches and flecks on the branchial regions and 

 near the posterior groove of the carapace, which in the male from Sinabang-Bay are pale 

 brick-coloured, are in this specimen entirely wanting, while the other patches on the carapace 

 and the antennal peduncles are of a verdigris colour. The carapace of this female appears 



