Munna from New Zealand. 5 
_ The antenne (Plate I. figs. 1 and 3) are very long, when 
fully developed being considerably longer than the body ; in 
small specimens they are shorter in proportion to the body. 
They present nothing remarkable in their character. The 
first three joints are subequal, short, the fourth and fifth sub- 
equal, very long, slender; the flagellum slender, about as 
long as the whole peduncle. The antenne are often bent 
sharply backwards at the end of the third joint, so that the 
fourth joint is directed backwards, while the fifth and the 
flagellum are directed forwards again. There is no trace of 
the rudimentary exopodite found in Janira, lanthe, and 
Stenetrium. 
The upper lip (Plate I. figs. 4a and 4 4) is attached to the 
front margin of the head and is directed forwards and partly 
downwards. It is nearly semicircular, slightly convex above ; 
in the centre the front margin curves over underneath, so that 
when viewed from above the lip appears slightly emarginate 
in the centre. When viewed from below it is seen that the 
middle portion of the front bears many short sete, those on 
each side being directed inwards. 
The mandibles (Plate f. figs. 5a and 56) are similar to 
those of Janthe. The right mandible bas only one cutting- 
edge, ending in four distinct sharp teeth, next to which come 
five large pectinated sete, arranged in an oblique line across 
the end of the mandible. The seta nearest the end is the 
broadest and the most pectinated, being quite comb-shaped ; 
the others are longer, but gradually decrease in breadth and 
in the number and size of the pectinations, the fifth having 
only a few pectinations towards the end. The molar tubercle 
is long, rather slender, and has the end obliquely truncate 
and bearing two or three rather long sete in addition to the 
usual short thick-set setee which form the grinding-organ at 
the end. 
The left mandible is similar, but has two cutting-edges, 
the end one with five teeth and the inner with four; then 
follow four or five pectinated sete, as in the right. 
The palp (fig. 56), which is the same on each side, con- 
sists of three joints, the second being the longest and about 
half as long again as the first; towards its distal end it bears 
two stout serrated sete; the third joint is somewhat shorter 
than the first and bears five or six stout sete on one side 
towards the distal end; these are placed at right angles to 
the joint and are curved and serrated on the concave edge; 
they increase regularly in length distally, the last one being 
nearly as long as the joint itself. The third joint is usually 
bent at right angles to the second. 
