TWO SPECIES OF CUMACEA IN NEW ZEALAND. 269 



1. 2. 3. 4. 5. 6. 

 11 11 U 21 29 21 



The integument is smooth over the whole body, aud exhibits a 

 distinct reticulation under the microscope (PI. XVIII. fig. 3). 

 Its colour (in my spirit-specimens) is a uniform white without 

 any pigment-spots. 



Owing to the imperfect preservation of the only adult speci- 

 men, the antennal and oral parts could not be satisiactorily made 

 out. The mandibles are of normal form, that of the right side 

 having the molar process more strongly toothed than in the 

 left. 



The first gnathopods (fig. 4) are slender, and have the bases 

 nearly smooth, except the extremity of the outer edge, which 

 bears a few short bristles, and the anterior margin, which 

 has a few long plumose setae. The remaining five joints are 

 all more or less furnished with plumose setae. The ischium 

 and carpos bear each on their outer extremity a very long 

 plumose seta. 



The second gnathopods (fig. 5) are half as long again as the 

 preceding pair, and more than twice as broad. The basos is long 

 and broad, and bears on its inner edge a row of strong bristles. 

 At its outer extremity it is furnished with a double row of 

 long plumose setae, which extend nearly as far as the end of 

 the limb. The exopodite (with its setae) does not quite reach to 

 the end of the basos ; it is 7-jointed, and ends in numerous 

 long setae. 



The legs of the first pair (fig. 6) are very long, exceeding the 

 carapace, and about equalling the length of the whole cephalo- 

 thoracic portion of the body. The basos is long and curved out- 

 wards, smooth on the upper edge, which is terminated by two 

 long setae, and furnished on the lower edge vrith a row of simple 

 setae ; its anterior margin bears a single tooth. The ischium and 

 meros are very short, subequal, and nearly smooth. The three 

 remaining joints are very slender and elongated ; the carpos is 

 quite destitute of setae, while the two following joints have only 

 a few long slender simple setae on their lower margin. The 

 exopodite only reaches with the end of its setae a little past 

 the extremity of the basos. Its basal joint, as well as the 

 basos of the limb itself, appears under a moderate power of the 

 microscope as if covered with finely imbricating scales. The same 

 markings appear on the next two pairs of limbs. 



