BIHANG TILL K. SV. VET.-AKAD. HANDL. BAND 11. N:o 9. 13 
flagellum consists of one thick basal joint, occupying half the 
- length of the flagellum, and about 20 smaller joints. It 
is bordered with more than 40 long, plumose hairs along 
each side. 
The first segment of the urus (Fig. 14) is carinated, and 
is bordered at the hinder margin with minute spines. The 
last segment is not carmated. - 
The peduncles of the uropoda are thick, inflated, prismatic, 
serrated along the margins, as broad as the free ramus is long. 
The peduncle of the first pair is four times, the one of the 
last pair three times longer than the outer ramus. 
The telson is minute, much shorter than broad. 
Colour. Hvyaline. 
Length. 105 mm. 
Hab. The Indian Ocean. 
The single, known specimen is taken by the Swedish Cap- 
taim MELLENBORG; it is preserved in the Zoological State Museum 
at Stockholm. 
4. Thaumatops longipes. N. sp. 
(Fig. 15—23). 
Diagn. Caput segmenta quattuor priora pereii longitudine superans, 
altius quam longius. 
Segmenta duo priora pereii libera, non coalita. 
Antenne primi paris recte, serrate acumini frontis inserte dimi- 
dium longitudinis capitis superantes. 
Metacarpi parium duorum priorum pedum pereii processu carpi bre- 
viores, fortiter serrati. Pedes pereii quinti paris ter longio- 
res illis septimi paris, longitudinem corporis superantes. 
Segmenta uwri non carinata. 
Pedunculi pedum uri ultimi paris duplo pene longiores ramo ex- 
terno, angustiores longitudine ejusdem rami. Ramus externus 
interno paulo longior. 
The head is longer than the four first pereional segments, 
deeper than long. 
The two first pereional segments are free, not coalesced. 
The first pair of antenne are straight, serrated, fixed at 
the anterior end of the head, longer than half the length of 
the head. 
The metacarpi of the two first pairs of pereiopoda are 
shorter than the corresponding carpal processes, coarsely serrated. 
