220 Transactions. — Zoology. 



10. Oncseola specialis, n. sp. Plates XVIII., and XIX., 

 tigs. 1-9. 



Size, - 8mm. ; thorax, 0'5mm. ; abdomen and furca, 

 - 3mm. 



Antenna i. 6-jointed (fig. 2), fourth joint scarcely longer 

 than the following. No aesthetasks. 



Antenna n. 4- jointed (fig. 3). 



Maxilliped i. (fig. 4) like a cock's comb. 



Maxilliped n. (fig. 5) both not of equal size. 



Swimming-feet i., n., in. (fig. 6) all equal. 



Seta interna of the second joint of the ramus exfcernus and 

 of the first joint of the ramus interims much stronger in the 

 proximal part than on the end. 



The third joint of the ramus exteruus of foot in. has, as in 

 foot iv., three thorns, and is only about as long as the first and 

 second joints together. 



Swimming-foot iv. (fig. 7a). Ramus interims staff-like, 

 2-jointed ; first joint small, second joint long, with two setae 

 on the end. 



Foot v. (fig. 8). A one-jointed staff, with two setae on the 

 end, just as the ramus interims of the fourth foot. 



Abdomen 5-jointed, the first segment bearing the fifth foot- 

 pair. Second genital segment as long as the three following, 

 the form like a pear, with a knob and three small spines upon 

 it (fig. 8). Furca (fig. 9) a little longer than the preceding- 

 anal (fifth) segment of the abdomen. 



7. Fam. Coryc.eid.e. 



11. Corycseus tenuis, Giesbr. 5 . 



Only one female specimen found in the Hauraki Gulf. 

 The species has only been previously described by Giesbrecht 

 from the west coast of Central America, and also a female 

 only. My specimen was recognized without doubt as C. tenuis, 

 and it is to be hoped that the male will also be discovered in 

 New Zealand. I was led to search specially for this species 

 because the following new species (C. aucklandicus), which is 

 very common in the harbour, is very nearly related to it ; and 

 I am glad to say that in this search I was at length suc- 

 cessful. 



12. Corycaeus aucklandicus, n. sp. Plate XX., figs. 1-10. 



I named it aucklandicus because this Copepod seems to be 

 a very steady and common inhabitant of the Auckland waters ; 

 males and females frequent. 



Total length, l«2mm. 



The new species belongs to the group G. lubbockii and 

 tenuis, which are distinguished from the other Coryccei by 

 the reduced ramus internus of the fourth swimming-foot. 



