540 AKE NORDENSTAM 
The marsupium covers the ventral side of the 5th, 6th and 7th segments 
and consists of 3 pairs of oostegits, of which the one on the 5th segment is 
very large. 
Abdomen. The anterior segments are very strongly coalesced, but the 
limitations of 5 segments are just to be discerned laterally, and dorsally also 
a large 6th segment is marked between the bases of the uropods. The length 
of the 6th segment is about 1/, of the proceeding together. Its posterior mar- 
gin has a median incision in the middle line. 
Telson linguiform with lateral margins not sinuous at the base. They 
are instead very slightly convex, almost straight in their whole length. Dorsal 
surface slightly convex, ventral surface with a faint longitudinal carina. 

Fig. 8. Paranthura nana. a ist pleopod, right, X 104. 6 2nd pleopod, right, X 104. 
¢ right uropod, X 54. 
Colour pale yellow with sparse, dark brown rounded dots. 
Antennulae are a little shorter than the head, and their ends extend 
slightly below the proximal margin of the last peduncular joint of the an- 
tennae. They consist of only 5 joints, which decrease in width to the last. 
The Ist is about as long as the two following together (slightly longer) and is 
about twice as long as broad. The 2 succeeding joints are of about equal 
length. The flagellum consists only of two joints, of which the last is very 
minute. The relation between the lengths of the joints is 20:9:8.5:5: 1.5. 
Antennae (fig. 7a). Ist joint about as long as the 2nd. The 3rd, 4th 
and 5th joints increase in length, so that the 5th is about half as long again 
as the 3rd. The flagellum consists of one distinct short joint, which is about 
‘/, as long as the last peduncular joint, but 2 very minute and obscure apical 
