11 ^ 
ZOOLOGICAL LITERATURE. 
Pollen^ Bull. Soc. d’ Accl. et d’Hist. Nat. de la KtSuaion. Idem, Mem. Sclent, 
pp. 6-11, and N. T. D. ill. pp. 322-324. 
Anseranas mdanolouca is ligured. S. Biggies, Orn. Austral, part vii. 
'I'adorna radjah, head figured. S. Biggies, Orn. Austral, part ii. 
Anas boschas and A. acuta: a hybrid presenting some characters of both of 
these species, and probably having its parentage from them, though differing 
from previously described examples, is noticed, as well as one bearing traces 
of a cross between the first and A. chjpeata. J. P. van Wickevoort Crom- 
inelin, N. T. B. iii. pp. 309-312. 
Anas zonorhynchus is the name proposed for a species from Formosa and 
China, hitherto confounded, both by the author (P. Z. S. 1863, p. 324) and 
Temm. & Schl. (Faun. Jap. p. 126, pi. 82), with A. poccilorhyncha, which it 
resembles in coloration, but has an ochreous band across the bill. B. Swiu- 
hoe. Ibis, 1806, p. 394. {Cf. Ibis, 1867, pp. 176, 207.) 
Querquedula hernieri, J. Verreaux, is identified with Anas assimilis, Forster. 
II. Sclilegel, P. Z. S. 1866, p. 426. 
Anas ylooitans and A. falcata : descriptions of, notes on, and synonymy of 
these species. J. Vian, B. Z. 1866, pp. 401-410. 
Malacorhynclius membranaeeus is figured. S. Biggies, o]j. cit. part vi. 
Ileteronetta is a genus proposed for the reception of Anas melanocephalaf 
Vieillot (N. Bict. v. p. 163), having the characters of Anas, but with the 
tip of the bill greatly incurved and narrower, short wings, wanting the 
speculum, very short tail, narrow, somewhat stiff rectrices, tarsi and toes 
moderate, claws sharp, and the plumage much as in Erismatura, T. Salva- 
dori, Atti Soc. Ital. Sc. Nat. viii. 1866. 
Somateria thulensis is the name by which the Spitsbergen form of S. 
moUissima is distinguished. The characters by which it is discriminated were 
previously given (CEfvers. K. Vet.-Akad. Fdrh. 1864, pp. 399-401, and 
J. f. 0. 1865, pp. 214-216), but the bird was then regarded only as a variety. 
A. J. Malmgren, J. f. 0. 1865, p. 396*. . 
Bucephala islandica is figured. B. G. Elliot, B. N. Am. part ii. 
Meryus castor and M. albellus are figured. J. Gould, B. Grt. Br. part ix. 
Laridas. 
* Blasius, j. H. Kritische Bemerkungen fiber Lariden. Journ. 
ffir Orn. 1865, pp. 369-384, and 1866, pp. 73-88. 
The author admits eighty-four species as well established, a 
number considerably less than do either Bruch (J. f. O. 1853, 
pp. 96-108, 1855, pp. 273-292) or Dr. Coues (Proc. Acad. Philad. 
1862, pp. 291-312, 535-559, and 1863, pp. 121-138), when 
the limits to which they restricted their labours are regarded. 
Nevertheless two species of Sterna seem to be described as new. 
Prof. Blasius also cuts down the number of genera with which 
the group has been loaded, only recognizing twenty-seven. He 
does not go very deeply into synonymy, only giving sufficient to 
bring together the species recognized as distinct by other authors 
but which he thinks identical. A table showing the geographical 
distribution of the members of the family is given, from which 
* Not published till . 1866. 
