TANAIDACEA AND MARINE ISOPODA FROM JUAN FERNANDEZ 527 
Colour slightly. bluish gray; under a lens pale yellow, but strongly mar- 
morated with dark-brown, forming a pattern of various-sized light spots. 
Antennulae about as long as carapax. Ist joint about 3 times as long as 
it is broad and 21/, times as long as the 2nd. The relation between the lengths 
Giithe joints is‘ 47219: 15:2. 
Antennae (fig. 2a) as long as the antennulae without the last small joint. 
Ist joint almost as long as the 3rd, 2nd joint the longest, a little longer than 
the 4th. The short flagellum consists of 2 small joints, together in the sub- 
adult male about as long as the last peduncular joint. 
Maxillipeds, vide fig. 2b. i 
Chelipeds, tmmature specimen (fig. 2c). yok 
Very strong. The last 3 joints are turned ae 
out a little, so as to be visible also in a dor- 
sal view. Carpus '/, longer than wide. Pro- 
podus only '/, as long again as itis broad. The 
immovable finger with its base very broad, 
much broader than dactylus. The free distal 
margin of propodus only slightly convex. 
Chelipeds,subadult male (fig. 2 d) have the 
free distal margin of propodus slightly concave. 
The dactylus is more evenly slender and, 
near the propodus, slightly turned at an angle. 
Its lower margin, except near the propodus, 
is almost straight. The propodus has about 
II setae in two groups on the distal margin 
and about 7 on the lower margin. 
2nd —7th pereiopods. The small ischial 
joint was only distinguishable on the 6th and 
7th legs. 
2nd peretopod (fig. 2e). 6th joint distally 
considerably decreasing in width, slightly 
longer (about '/,) than the 4th and 5th to- 
gether and about half as long again as the 7th 
joint, with claw. 
ene ie? v on jombalittle Fig. 1. Zamazs (Anatanais) marmoratus, 
shorter than the 4th, which is half as long = ” subadult male, X 38. 
again as the 5th. 5th joint on the posterior 
and lower-side with a distal row of 5 strong setae, of which the upper is the 
longest. One seta is situated on the anterior side near the lower distal angle. 
4th peretopod. Like the 3rd, but the 6th joint has only 4 setae distally on 
the posterior side, the small lower one being reduced, but on the rostral side 
there are instead two broad setae near each other. 
5th—7th pereiopods. 3rd joint on the 6th and 7th pereiopods small and 
indistinctly limited. 4th joint distally with a circle of 8 broad setae. On the 
7th pereiopods (fig. 2g) the carpus is almost half as long again as the merus, 
and the propodus about 1/, as long again as the carpus. In the figure only 6 

