Hector. — Notes on New Zealand Ichtliyology. 243 



6c. HAPLODAOTYLUS PERGUSSONI. sp. nov. 



Native name— Hiwihiwi. 

 P. 6/8 j D. 13/18 ; A. 3/6 ; V. 1/5 ; L.L. 60 j L.T. 25. 



Head three and a half times in the length and equal to the height; 

 snout produced, profile concave, eyes prominent, their diameter being equal to 

 half the gape ; cheeks scaly ; mouth deeply cleft, with thick lips ; upper 

 jaw formed by inter maxillaries ; teeth minute, trenchant, lance-shaped, with 

 single points in several rows on both jaws and a patch on the vomer ; scales 

 oblong, large, equal to half the orbit, cycloid, with six rays on attached 

 margin. 



Colour, grey-brown spotted with blue, white beneath. 



Takes the hook, and is occasionally caught along with tarakihi. Stomach 

 contained limpets and other shell-fish. Kawakawa Bay, East Cape, March, 

 1874. 



Total length, 11 inches. 



The six lower pectoral rays being simple, place this sparoid fish in the 

 genus Ilaplodactylus, forming thus an exception to the other species of the 

 genus, which are all vegetable feeders. The Maoris prize the hiwihiwi 

 highly as food, considering it hardly inferior to the maomao {Difrema violacea). 

 I have dedicated this species to His Excellency Sir James Fergusson, to whom 

 the Museum is indebted for many valuable specimens of the marine fauna of 

 the New Zealand coasts. 



6d. GIRBLLA PBRCOIDES. sp. nov. 



PL X. 



Black Perch. 



B. 6 j P. 15 j V. 1/5 j D. 15-12 ; A. 3-11 ; L.L. 58; L.T. 7/19. 



Length three and one fifth times the height and four times that of head ; 

 orbital diameter equals half of snout and one-fifth of height of head ; 

 mouth protrusal with three imbricate rows of small teeth with blunt curved 

 tips and a crowded belt of setaceous teeth on the inside of both jaws. 



Dorsal begins behind the insertion of the pectoral and over the ventral ; 

 first soft dorsal ray is over the vent ; base of the anal is less than the soft 

 dorsal, its length exceeding by one half the height of the dorsal, which is one 

 fourth the height of the body ; second anal spine less than the third, the first 

 being merely a slender process from the second, and not distinct in its 

 insertion ; caudal emarginate ; lateral line arched ; scales large, ciliate. 



Colour (dried), olive-brown. 



A single stuffed specimen in the Auckland Museum, labelled "Black 

 Perch, Nelson." 



Length, 16 inches. 



It is a handsome fish in general form and size of scales, resembling the 



