240 Transactions.— Zoology. 
Hab. I found numerous individuals washed up on the Ocean Beach near 
Dunedin on two different occasions. They appear to come ashore in fine 
clear calm weather. 
> 
EXPLANATION OF PLATES XII. AND XIII., Fras. 1-5. 
Prate XII. 
Figs. 1-8. Corophium excavatum. 
. Adult; 2. mandible; 3. second gnathopod ; 4. third pu. 5, 6 and 
7. ante-penult., penult., and ultimate pleopoda ; 8. telson 
Figs. 9-10. Edotia dilatata. 
9. Adult re ; es opercular plate. 
Figs. 11-18. Pseudega pun 
. 11. Dorsal view ; mes lateral view ; 13. head, seen from the front. 
. Figs. 14-21. Ozycephalus edwardsii. 
14. Adult male; 15. anterior antenna, jm 7 anterior antenna, young 
male; 17. posterior antenna, young male; 18. mandible-palp ; 19. first 
gnathopoda; 20. second gnathopod ; m" hai cones of the lateral 
eyes. 
Prate XIII. 
Fig. 1. Oxycephalus edwardsii. 
Posterior portion of abdomen, showing telson and three posterior pairs of 
pleopoda ; also the structure of the extremity of the intestine. 
Figs. 2-5. Allorchestes recens. 
2 and 3. female and male anterior gnathopoda; 4 and 5. female and male 
posterior gnathopoda. 
Arr. XIL— On a new Species of Daphnia. By Geo. M. Thomson, F.L.8. 
[Read before the Otago Institute, 7th May, 1883.] 
Plate XIII., figs. 6-9. 
Last year Mr. Chas. Chilton sent me down specimens of a new Daphnia 
from South Canterbury, differing markedly from the form common about 
Dunedin, and which was described by me as D. obtusata in Trans. N.Z. 
Inst. vol. xi., p. 261. 
It is singular that these two species of Daphnia and one of Chydorus 
should be the only representatives of the Cladocera hitherto found in New 
Zealand. While the general poverty of our fresh-water fauna may no 
doubt hold good in this case as in so many others, it is yet probable that 
a search in other parts of our islands will result in the discovery of other 
forms. 
