38 DE. W. T. CALMAN ON NEW OR RARE 



upper edge is less than one-fourth of the total length of the carapace. The antennal 

 notch is well marked, defined below by a triangular tooth. The antero-lateral margin 

 above the notch bears three or four serrations, and the front part of the lower margin 

 is serrated. The side of the carapace is marked by a single horizontal ridge above 

 the middle of its height, curving upwards posteriorly to join the hind margin, and 

 terminating anteriorly below the end of the frontal fissure. 



Anteunules with the outer flagellum of three segments, the inner of one, equalling 

 the first segment of the outer. 



The legs, so far as they are visible without dissection, present no marked differences 

 from those oi Paraleucon. 



The uropods have the peduncle a little longer than the terminal somite and three 

 times as long as thick. The rami are subequal and 1^ times as long as the peduncle. 

 The endopod is distinctly segmented, the proximal 1^ times as long as the distal 

 segment. The terminal spine is not much longer tlian the distal spine of the inner 

 edge. The exopod has several unequal setae at and near the tip. 



Description of adult Male. — Total length 2*35 mm. 



Dorsal edge of carapace slightly arched, with only some faint traces of serration 

 anteriorly. Pseudorostrum horizontal, truncated, less than one-fifth of total length of 

 carapace. No antennal notch or tooth, the antero-lateral corner rounded off", the 

 antero-lateral edge serrated from the base of the pseudorostrum to the lower edge. 

 The side of the carapace bears a horizontal ridge similar to that of the female. 



The antennae have a very short flagellum and hardly reach back to the hind margin 

 of the carapace in the natural position. 



Exopods are present on all except the last pair of legs. 



The uropods resemble those of the female. 



Occurrence. — "Lyttleton Harbour, 5/97, 1-5 fathoms, H. Suter " ; " Akaroa 

 Harbour, 8/97, 6 fathoms, H. Suter." Copenhagen Museum. 



Hemileucon cojies, sp. n. (Plate IX. figs, 26-32.) 



Description of adult Female. — Total length 2-8 mm. 



Carapace less than one-fourth of total length, its vertical height less tlian two-thirds 

 of its length. Dorsal crest very slightly arched, iiuegularly serrate anteriorly, with 

 a depression near the posterior end. Pseudorostrum straight, directed obliquely 

 upwards, sharply pointed. The length of its upper edge is about one-third of the 

 total length of the carapace. Antennal notch rather widely open, defined by a 

 triangular tooth, the lower edge of which is obscurely serrated. The side of the 

 carapace bears two oblique ridges similar in position to, though less strongly marked 

 than the two anterior ridges of Paraleucon. 



