G. M. Thomson. — Notes on New Zealand Crustacea. 211 



distinctive points in the foregoing table are in organs liable to great modi- 

 fication, particularly at varying ages. 



In the specimens gathered by me there was considerable diversity on the 

 first point, even among specimens gathered from the same spot ; there were 

 great differences in the structure of the inferior antennae ; while there was 

 considerable uniformity on the fourth and fifth points. 



The specimens were from a number of different localities, and it is 

 remarkable fact that, with few exceptions, females only were found. The 

 commonest colour was a clear red-brown, but some were yellowish-red, 

 others marbled reddish and pink, and others dark muddy brown. 



(1.) From Otago Peninsula, among ferns, &c., na the bush. Thirty-one 

 specimens of all sizes, all females, answering to description of 0. sylvicoia, 

 female. 



(2.) From Dunedin, among the roots of cocksfoot and other grasses on 

 the town belt, about a mile from the bay. Thirty-nine specimens. These 

 showed an extraordinary diversity : twelve were females agreeing with 0. 

 sylvicoia, female ; twenty-four were females much more similar to 0. tenuis, 

 female ; while three were males. These last do not agree with the descrip- 

 tions of the males of 0. sylvicoia having very remarkable propoda (fig. 4) 

 to the second pair of gnathopoda. These resemble the corresponding organs 

 of 0. aucklaiiclicB more than any other species. The upper antenna are as 

 long as the peduncles of the lower, and in this and other characters they 

 approximate most to the description of 0. tenuis, 



(8.) From Flagstaff hill near Dunedin, among bush, at an elevation of 

 about 1,300 feet. Twenty-one specimens, all females, answering to 0. sylvi- 

 coia, female. 



(4.) From Preservation Inlet, in the bush. Three specimens, females, 

 corresponding most nearly to 0. tenuis, female. 



(5.) From Port Pegasus, Stewart Island, in the bush. Nineteen speci- 

 mens, all females. Of these, nine approximated pretty well to 0, sylvicoia, 

 female, while the other ten came nearer to 0. 7iov(x-zealandicB, female, in all 

 but the length of the third pair- of pereiopoda which was in every case much 

 shorter than the fourth and fifth ]3airs. 



(6.) From Copper Island (Paterson Inlet) Stewart Island, in the bush. 

 Thirty specimens, of which twenty-nine were females and one male, all 

 agreeing well with the description of 0. sylvicoia. 



(7.) From bush in the neighbourhood of Dunedin. Twenty specimens, 

 of these nineteen were females and one male. The latter, while agreeing 

 generally with 0. sylvicoia, male, differed in having the inferior antennae 

 very short, being little over a third of the length of the body; and in having 

 the third pair of pereiopoda much shorter than the fourth paii% 



