34 



teeth with which the pleura are armed, is substantially the same as in the young individual 

 from Ternate, but owing to the female from Buton-strait being adult, the number of spines is a 

 little greater or they are a little larger. The pleura (Fig. gd) of the i^' somite are armed with 7 or 

 8 spines, 3 on the lower half of the anterior margin and 4 or 5 on the lower margin, arranged 

 in two pairs that are separated by a somewhat larger interval. Si.\ small spines occur anterior 

 to the concave emargination of the lower margin of the 2"^^ pleura and four posterior to it, a 

 somewhat larger spine e.xists on the lower half of the anterior margin and on that of the 

 posterior: these two spines are directed downward. Eight or nine small, somewhat unequal spines 

 are observed on the arched lower margin of the pleura of the 3'^'' somite, a larger spine, turned 

 downward, is seen on the lower half of the posterior margin. Three small spines only exist on 

 the lower border of the 4'^ pleura, between which one observes a few small prominences; a 

 much larger spine, turned downward, occurs on the lower half of the posterior margin and this 

 spine is also comparatively considerably larger than in the young specimen from Ternate. The 

 narrow pleura of the s'*' somite are beset inferiorly with 3 spines, that increase in length from 

 the anterior to the posterior, so that the latter is 3-times as long as the former. The 6'*' somite 

 which in a lateral view appears twice as long as high and, looked at from above, twice as long 

 as broad, is armed on each side with three spines. When it is looked at from above, one 

 observes one spine, turned backward and somewhat outward, at the outer angles of the slightly 

 arched posterior margin, a second, directed laterally and slightly backward, at the anterior third 

 of the somite and this spine is implanted on the lateral side of the latter, not far from the 

 lower border. The third spine, that is also directed laterally and a little backward, is implanted, 

 at the level of the anterior margin of the basal joint of the uropods, close to the lower border 

 of the somite. 



The telson (I'ig. 9^, 2,8 mm. long, one and a half as long as the 6''^ somite and still a 

 little longer than the 5"* and the 6''^ taken together, resembles that of the young specimen from 

 Ternate. At almost one-fourth its length from the base the telson shows its greatest width of 

 1,04 mm.; between this point and the base the lateral margins are a little concave, while 

 posteriorly they strongly converge towards the tip. The telson ends (Fig. gd) posteriorly in an acute 

 median spine, 0,1 mm. long, on either side of which 3 articulating spines are implanted; the 

 1*' next to the median spine, beyond which it reaches by about half its length, is 0,29 mm. 

 long, the 2"'', 0,5 mm. long, is the longest of all and extends by more than halt its length 

 beyond the median sjjine, the 3"', finally, 0,2 mm. long, is the shortest of the three and 

 implanted at the posterior extremity of the lateral margins; from these extremities the lateral 

 margins of the tip run obliquely to the median spine and the telson is here 0,33 mm. wide, 

 o n e - 1 h i r d the greatest w idth anteriorly. The upper surface is broadly grooved from near the 

 base to the tip and the 5 pairs of spinules are implanted on the borders of the groove. The 

 spines of the i*' or anterior pair, 0,17 mm. long, are placed at one-fourth the length of the 

 telson from the base, each .spine twice as far distant from the middle line as from the lateral 

 margins. The distance of the spinules of the 2""^ pair from the base measures about one-third, 

 viz. ^/,^, of the length of the telson and these spinules are just as far distant from one another 

 as those of the 1^' pair and are therefore placed a little closer to the lateral margins. The 



