APPENDIX. 497 



Cauda rotundata, rectricibus lanceolatis, acu- short ; lesser quills mucronated at their tips. 

 minatis. Digiti laterales incequales ; posticus Tail rounded, the feathers lanceolate and 

 mediocris ungue ejus longior. pointed. Lateral toes unequal ; hind-toe 



moderate, longer than the claw. 



Type Centrocercus urophasianus, Nob. p. 359. 



46. Sub-genus, LYRURUS. 



Cauda lyrce forma, h.e. altius hifurca, rec- Tail lyrate, i.e. considerably forked, the 



tricibus lateralibus extus curvatis. Plumas exterior feathers curved outwards. Plumage 



lucidce. Alas mediocres, remige tertid longis- glossy. Wings moderate, the third quill 



simd. Digiti nudi ; laterales cequales. longest. Toes naked ; the lateral ones equal. 



Type. — Lyrurus teirix, Sw. (Tetr ao tetrix, Avct.~) 



Family, ANATID.E. 



47. Genus, DENDRONESSA. 



Caput cristatum. Rostrum basi ceque altum Head crested. Bill as high at the base as 

 ac latum, apicem versus angustatum contrac- it is broad ; towards the tip narrow and con- 

 tumque. Nares sub-medice. Parapterum pul- tracted. Nostrils placed towards the middle 

 chre coloratum. Pedes Anatidis. of the bill. Tertial feathers ornamented. 



Feet as in Anas. 



Type. — D. galericulata (Chinese Teal, Edwards, pi. 102.) 

 Obs. — This is obviously the rasorial type of the Anatinm. The D. sponsa, by the lateral advancement of the bill 

 towards the eye, is a more aberrant species, and shows the connection of the group to Somateria. The fissirostral type 

 inhabits India, and is in our Museum. As we have lately illustrated the genus Anas *, it seems unnecessary to repeat 

 its characters in this place. — Sw. 



* " On the Typical Perfection of the Family of Anatidae." — Journal of the Royal Institution, No. 4. 



3 S 



