May. 1893. THE MOAS OF NEW ZEALAND. 375 



Palapteyyx, there is no apparent reason for separating them. Take 

 the next genus, Anoiualoptevyx, the maximum ratios of both its tibia; 

 and femora fah lietween the maximum and minimum of the genus 

 preceding it, while the maximum ratios of the metatarsus, tibia, and 

 femur of Cela — the genus following in succession — fit between the 

 maximum and minimum of those in Anomaloptevyx, while the ratios 

 obtained from the metatarsus, tibia, and femur, in the next genus still, 

 Mesopteiyx, fit also between the highest and lowest ratios in Cela. It 

 is evident that these ratios are valueless for differentiating the various 

 bones into their proper genera by measnvement alone, as is done in 

 this paper. Indeed, if Mr. Hutton has correctly assigned to the 

 genus Euvyapteyx three types of skull, why may not many of the 

 varieties or types of cranium of Moa which we know not have 

 belonged to one genus, even species, just as the cranium of Gallus or 

 Colnmba does ? It is also only in a few cases known certainly to 

 what crania the numerous separated beaks belong, most of them 

 having been on\y fitted together. 



Turning to the question of species, the metatarsus of Dinoynis 

 inaxiiiiHs is separated from that of D. excelsns by extreme difference of 

 •5 inch in length and i"25 in girth, and by a mean difference in the 

 two species of "5 inch in length and of "j in girth ; while associated 

 together as D. validus, we have metatarsi varying as much as i inch 

 in length and '6 inch in girth. The difference between the minimum 

 tibia oi D. maximiis and the minimum tibia oi D. excelsns, is i'5 inch 

 in length and i mch in girth, while we have tibiaj differing by 1-5 inch 

 in length and in girth of 1-2 inch assigned to the one species, 

 D. validus. Again, the maximum metatarsus assigned to D. giganteus 

 lies midway between the greatest and least metatarsus assigned to 

 D. validus ; the minimum tibia assigned to the former is intermediate 

 between the largest and smallest of the latter ; while the maximum 

 femur of D. giganteus is identical with the minimum femur of D. validus. 

 The greatest difference in the metatarsi between the largest D. validus 

 and the smallest IJ. giganteus is only '5 of an inch in length, and i*8 

 in girth ; in the tibiae 2 inches in length and 1-2 in girth ; in the femora 

 I inch in length and 1*4 girth. If we compare D. yobustus with 



D.fiymus, we find, 



A mean 

 In D. yobustus. \x\ D. firmus. difference of 



Length. Girth Length. Girth Length. Girth 



Metatarsus . . i7'2-i57 (yj-^'i ■ • 17 0-15 75 5<J-4 75 ■ • oS 78 



Tibia .. .. 32-7-3oo 68-62 .. 330-300 6-5-53 .. 35 60 



Femur .. .. 155-14-4 8-1-7-2 .. 1525-145 75-60 .. 07 90 



Take another instance, and compare D. ingens with D. fiymus : — 



D. ingens. D. firmus. Difference. 



Length. Girth. Length. Girth. Length. Girth. 



Metatarsus . . 15 25 4-75 . . 15 75 475 • ■ -50 00 



Tibia . . . . 29 50 5 30 . . 300 5-30 . . 50 00 



Femur .. .. 1425 725 .. 15-25 7-50 10 25 



Is there any real reason why these metatarsi, tibia,-, and femora 



