()0. HYMFNOL.EMUS. 455 



inches, wing 7'o, tail 4-8, outer tail-feathers 3-2, culmen 1-4, tarsus 

 1-5. (RothH-hild Coll.) 



It seems to me that this extremely singular bird, wliicli Messrs. 

 Rothschild and Hartert have done me the honour of naming after 

 me, has its nearest ally in Ifi/menold'mus \ and for the present I 

 think they must both find their ])lace near Merganettit, although 

 it is quite possible that they belong to a distinct subfamily. The 

 species of the genera IIi/iitenohrniKs and Mciyanetla are all mountain- 

 stream Ducks, aud I believe it will also be found that Sulfadorlna 

 has the same habits. 



JA(l>. ^^'aigiou. 



(50. HYMENOLiEMUS. 



Type. 

 Malacorliyuchus, Jl'd///. [nee Sit:) 7.s;'.s, 1832, 



p. 12-'»5 11. malacorLyuchus. 



liynienolaimus, G. li. Gr. Ann. is Mag. X K. 



xi. p. 370 (1843) II. malacorhyncbus. 



Hvmenolteinus, Ayass. J\'ci/«. Zoul., Ind. Univ. 



p. 190 (1846). 



Range. Confined to the Xew Zealandian subregion. 



I. Hymenolaemus malacorhynchus. 



Blue-grev Duck with a soft bill, Cook, I'oy. i. pp. 72,97; Forst. Voy. 



i. p. 157 (1777). 

 Soft-billed Duck, Lath. 8yn. iii. 2, p. 522, u. 67 (1785). 

 Anas malacorhvnchos, Gm. <S'. X. i. 2, p. 526, n. 59 (1788) ; Lath. Lid. 



Orn. ii. p. 862, n. 70 (1790) ; Bonn. Enc. Met/i. i. p. 12 (1790) ; 



Vm//. X. IJ.\. p. 119 (1816); Bum. IHct. Sc. Xut. \i. p. 387 



(1817) ; EUman, Zoulog. 1861, p. 7471. 

 Hhynchaspis nialacorhynchos, Step7i. Gen. Zool. xii. 2, p. 123 (1824). 

 Malacorhvnehus forsterorum, Wayl. Isis, 1832, p. 1235; G. Ji. Gr. 



in Ditf. Trav. ii. App. p. 198 (1843). 

 Malacorhynchus membrinaceus, part., ^y^. Moti. Anat. p. 136 (1838). 

 Hj'menolaimus malacorhvuchus, G. R. Gr. Ann. ^- Mag. X. H. xi. 



p. 370 (1843); id. List B. Brit. .Uus. iii. p. 142 (1844); id. ^■ 



Mitch. Gen. B. iii. p. 623, ])1. 168 (1844); Rchnb. Syn. Av., 



Natatores, t. 77. f. 893 (1845) {e.v Gray S,- Mitch.); id. Av. 



Syst. Xat. p. viii (1852); G. E. Gr. Ibis, 1862, p. 241 (syn. 



emend.) ; Hector, Xew Zeal. E.vk. p. 277 (Otago) (1866) ; Haast, 



J.f. 0. 1868, p. 244; Hntton, Ibis, 1870, p. 398 (Auckland); 



FitLsch, J.f. O. 1870, p. 358; Potts, Tr. X. Z. Inst. ii. 1869, 



p. 73 (1870), iii. 1870, p. 103 (.1871) ; Iluft. Cat. B. X. Zeal. p. 37 



(1871) ; Finsch, J. f. (). 1872, p. 187; Tracers, Tr. X. Z. Inst. iv. 



1871, pp. 206, 208 (1872) ; Finsch, J.f. O. 1874, p. 202. 

 Anas malacorhvnclia. First. Icon. ined. t. 74 ; id. Dvscr. An. (vd. 



Licht.) p. 94 ("1844) ; Gieb. T/ies. Orn. i. p. .".56 (1872) (syn. emend.). 

 Hymenolaemus malacorliynchus, Bp. Comid. Bend, xliii. p. 651, 



n. 153 (1856); Lai/ard, Ibis, 1863, ]i. 245 (Xapii'r, E. const); 



Simd. Meth. nat. Ac. disp. Tent. p. 148 (1872); Buller, Hist. B. 



Xew Zeal. p. 262, pi. — (1873) ; Sclat. P. Z. S. 1876, p. 463 (Zool. 



Ciard.), 1880, p. 527 ; Buller, .Man. Ji. Xew Zeal. j). 71, pi. xxxi. 



(upper fiirure) (1882) ; Finsch, Ibi.-', 1882, ]>. 400 (Alpine region) ; 



Sclat. List Vert. An. 8th ed. p. 441 (1883); id. P. Z. S. 1884, 



p. 389 (Zool. Gard.) ; Buller, Hist. B. Xew Zeal. 2nd ed. p. 276, 



