Chilton. — Additions to the New Zealand Crustacea. 71 



another portion stretching out of the part already described, like a greatly 

 elongated egg ; this portion is exceedingly delicate and transparent ; the 

 small dot which marks the end of it is often more easily seen than the rest. 

 (Fig. lb.) 



The mandible bears a three-jointed appendage ; the first and second 

 joints being equal in length and longer than the third ; the last two bearing 

 stout setae which increase in length as they approach the distal ends of the 

 joints on which they are situated (fig. lc). 



The first maxi]la consists of two nearly straight lobes, the inner one 

 tipped with slender plumose setae, the outer one longer and larger and 

 bearing strong serrated setae at the extremity (fig. 1 d). 



The second maxilla consists of three delicate overlapping plates ; the 

 two outer ones of which bear similar long simple setae which appear to be 

 transversely ribbed (fig. 1 /). On the third and inner lobe are setae, two of 

 which bear delicate filaments near the base only ; the others bearing fila- 

 ments on one side only throughout the whole length of the seta (fig. 1, 



The maxillipedes have the basal portion long and straight, tipped at the 

 end with several moderately strong setae. This basal portion bears a four- 

 jointed appendage, the joints of which decrease in size distally; the first 

 three have the distal end produced into a rounded lobe tipped with setae. 

 (Fig. 1 h.) 



The first pair of legs (fig. 1 k) is short and stout ; the meros is short 

 and expands greatly at the distal end, carpus very short, the dactylos is 

 large and bears at the end two claws, the terminal one larger than the 

 other which bears a small piece projecting on its inner side (fig. 1 I). 

 The large claw appears to be more or less articulated to the rest of the 

 dactylos. The second leg (fig. 1 m) is much longer and slenderer ; the 

 basos has its inner side fringed with short setae, the meros is longer than in 

 the first and expands distally, the carpus is slender and as long as the 

 propodos; the dactylos ends with two claws (fig. 1 n), the smaller with 

 several stiff projections along its inner edge, one towards the base of the 

 claw being much stouter than the others. The remaining legs are some- 

 what like the first, though not so stout, being thus more or less interme- 

 diate in form between the first and the second. 



The pleopoda or branchial plates have the basal joint broad and sup- 

 porting two large branchial plates, the inner one being longer than the 

 outer and broader at the base than at the end ; both abundantly supplied 

 with long plumose setae (fig. 1 o). The pleopoda all rest in a cavity formed 

 by the excavation of the under side of the segments of the pleon, much in 

 the same way as in Sphceroma. 



