OKNITIIOLOGICAL EXPLORATIONS. 



171 



1786. — Anas diapar Spauumaxn, Mils. Carltsou. (tbb. 7 and 8). — Sotnclerla disijar Blak- 

 IST., Ibis, 187G, p. 3:!5. — /rf., Amcud. List B. Jap., i). 29 (1S84). — Blakist. and 

 Pryek, Ibis, 1878, p. 215.— lid., Tr. As. Soc. Jap., VIII, 1880, p. 187.— iid.. 

 Hid., X, 1882, p. 100. 



The bill of this species is very peculiar, and would aloue justify its 

 separation as the type of a distinct genus. Especially characteristic 

 are the soft lobes formed by the tomia of the upi)er mandible in their 

 anterior half. When dried they roll up so as to inclose the lower man- 

 dible and become hard, the lateral outline thereby being considerably 

 changed, becoming unduly narrowed towards the tip. 



List of specimens collected. 



No. 92854. — Iris dark browu. Bill, light bluish gray ; nail somewhat yellowish ; skin of mental angle 

 light as the bill. Feot gray, with a tinge rather brownish than bluish; joints and tarsus behind darker; 

 webs blackish. 



No. 92851.— Iris dark brown. Bill, light bluish graj' ; naked mental angle, hardly darker toward the 

 feathering. Feet browuish gray; webs and bul<>w blackish. The crop contained green Algai, four 

 different species of Mollusks, at least six 8i)ecies of Amphipods, and one Idotcea. 



No. 92857.— Iris dark biown. Bill, grayish blue, as is also the naked space of the mental angle. 

 Fee t of a brownish peurl-gray, darker on the joints and behind ; webs blackish. New feathers in their 

 sheaths, especially in the head, in the armpits, and on the rump. 



No. 92850. — Like foregoing, only feet pure gray without any brownish tinge. New feathers on head, 

 treast, and scapular region. 



No. 92858. — New feathers in their sheaths all over the body. Extremely fat. 



Nothing special is to be remarked about the plumage and the color 

 of the specimens enumerated above, except that a narrow whitish spot 

 is found in two of the old males on the outmost pair of rectrices, near 

 their tip, while wanting in the other specimens (cf. also Keyseiiing 

 und Blasius, Wirbelth. Europ., p. 230, and Naumauu, Naturgesch. 

 Vog. Deutschl., XII, p. 247). Another noteworthy feature is that in 

 IsTo. 92853, an adult male, the firsf primary in the left wing has the 

 greater ])art of the inner web pure white, while some of the inner pri- 

 maries and the hand coverts likewise show signs of i)artial albinismus. 



