On the Oeographical Relations of the NeW'Zedland Fauna. 85 



arrangement differs in different parts of the frond. Sometimes 

 they are disposed in regular diagonal lines ; but even in tliis 

 case there are often perceptible central longitudinal lines, on 

 either side of which the diagonal rows of fenestrules diverge in 

 opposite directions like the barbs of a feather, giving rise to 

 a most peculiar appearance. At other times the fenestrules 

 are rhomboidal, or hexagonal, or polygonal, and are not ar- 

 ranged in distinct diagonal rows ; whilst two contiguous longi- 

 tudinal rows are often separated by an unusually narrow and 

 apparently quite sti'aight branch (see fig. 2, c). The spaces 

 along which the flexuous branches inosculate have a depth of 

 about half a line, considerably exceeding the width of the 

 branches ; so that whilst seven fenestrules occupy a quarter of 

 an inch measured diagonally, only four occupy the same space 

 measured longitudinally. The thickness of the frond, measured 

 at right angles to its plane of growth, is one line or a little 

 more, nearly two thirds of this being accounted for by the 

 great internal keels. Lastly, there are generally three cell- 

 mouths to the length of a fenestrule, with two placed opposite 

 the inosculation of each pair of contiguous branches. 



The only known example of this singular species was dis- 

 covered by my friend Mr. George Jennings Hinde, by whom 

 it was submitted to me for examination, and in whose honour 

 I have named it. 



Locality and Formation. — Corniferous Limestone, Jarvis, 

 county of Walpole. 



XIIL — The Geoqrajyhical Relations of the Neio-Zealand Fauna. 

 By Captain F. W. Hutton, C.M.Z.S. 



[Concluded fiom p. 39.] 



Fish. 



Up to the present time about 134 species of marine fish are 

 known to inhabit the shores of New Zealand. Of these, 

 51 (or 37 per cent.) are found nowhere else; 38 extend to 

 the Australian and Tasmanian seas, but no further; six 

 range to the Pacific islands, five inhabit South America, four 

 South Africa, and one Kcrguelen Land and the Auckland 

 Islands ; there are also four others that are common to botli 

 Australia and South America, five common to Australia 

 and South Africa, two common to Australia and the Pacific 

 islands, and one common to Australia and the Auckland 

 Islands. Thus the total number of our sea-fishes found in 

 Australia is fifty, in South America and the Cape of Good 



