Forbes.— 0;/ a Ncm Genus of Percidye. 273 



I have another spider, a member of the family Attoidce, 

 found in the bay in the same locahty, and having the same 

 habit, except that it constructs for itself a j)rotective tube ; 

 but, owing to the difiiculty of assigning an example to its 

 genus in a family containing so many ill-defined genera, I 

 have been unable to determine in which to place it. This 

 is the fourth marine spider discovered in New Zealand, 

 which is, I believe, the only country in which sucli spiders 

 have been found. 



Art. XXX. — On a Ncir Genres of Fishes of the Family 

 PercidcE, from New Zealand. 



By H. 0. Forbes, F.E.G.S., F.Z.S., A.L.S., Director of 

 the Canterbury Museum, Christchurch, New Zealand. 



[Read before the Philosoiihical Institute of Cantcrbiinj, 5tli Sept., 



1889.1 



Professor Hutton described in 1875 a new species of 

 Percidce, which he founded on a stuffed specimen in the Otago 

 Museum, Dunedin, under the name of Therapou rubigi- 

 110S21S. In his account of this fish in "Trans. N.Z. Inst.," 

 viii., pp. 209-10, he says, " It differs from Thcrapon in the 

 oblique cleft of the mouth, the forked caudal, and the greater 

 development of the scales on the vertical fins ; but I hesitate 

 to draw up generic characters for ic until I can get a fresh 

 specimen." The opportunity of examining a second and par- 

 ticularly fine example of this rare fish has fallen to me, by the 

 acquisition by this Museum of a specimen thrown on the 

 beach, in July 1889, near the mouth of the river Avon, in the 

 Province of Canterbury. 



The specific description given by Professor Hutton in the 

 volume I have cited leaves little to be desired in the matter of 

 accuracy ; a few points only, and those not easily to be made 

 out in a dried skin, require addition or emendation. I am 

 able also to confirm his opinion that a new genus would pro- 

 bably have to be established for its reception, of which I 

 therefore append the diagnostic characters under the name of 

 Plagiogencion, and a completed description of the species. 



PiiAGiOGENEiON,''' gen. nov. 



Body oblong, compressed, covered with ctenoid scales ; 

 eye equal in diameter to length of maxillary bone ; mouth 

 small, vertical ; teeth small, villiform in both jaws ; palate 



TrAayios = perpendiculai' ; yercioi' = jawed. 



18 



