Munnay/'om Neio Zealand. 5 



The antenna; (Plate I. fip^s. 1 and 3) are very lonji^, when 

 fully developed bcini^ considerably longer than the body ; in 

 small specimens they are shorter in proportion to the body. 

 Tliey present nothing remarkable in their character. The 

 first three joints are snbequal, short, the fourth and fifth sub- 

 equal, very long, slender; the flagellum slender, about as 

 long as the whole ]ieduncle. The antennaj are often bent 

 shar])ly 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 iq^per lip (Plate I. figs. 4 a and 4 h) 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 tlie lip apjiears slightly emarginate 

 in the centre. When viewed from below it is seen that the 

 middle portion of the front bears many short setse, those on 

 each side being directed inwards. 



^]l\\q, mandibles {Vl^to,!.. figs. 5 « and 6h) are similar to 

 those of lanthe. The right mandible has only one cutting- 

 edge, ending in four distinct sharp teeth, next to which come 

 five large pectinated setaj, 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 setse in addition to the 

 usual short thick-set seta? which form the grinding-organ at 

 the end. 



The left mandible is similar, but has two cutting-edges, 

 the end one Avith five teeth and the inner with four ; then 

 follow four or five pectinated seta?, as in the right. 



The palp (fig. 5^), 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 setae ; the third joint is somewhat shorter 

 than the first and bears five or six stout sette 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. 



