106 Proceedings of Indiana Academy of Science. 



heri' adopU'd i-drrcspoiids fairly wc-ll with the general coloi-ation of the 

 species concerned, although Xi/rocti bacri is, of course, an exception. Fur- 

 thermore, the sequence of species is virtually the same as that adopted by 

 Mr. N. HoUister in his recent notes on the relationships of Fuligula col- 

 laris,^ except that, of course, the sequence is reversed. 



The measurements of which use is made in proportional comparisons in 

 this paper have been taken as follows : 



Length of wing. — The distance from the bend of the wing to the tip of 

 the longest primary, taken with dividers without straightening the quills. 



Exposed culmen (length of bill). — The chord of the culmen. taken from 

 its tip to the point where the feathers of the forehead impinge on its base. 



Height of bill at extreme base. — The distance in a straight line from the 

 highest point on the base of the maxilla to the nearest point on the ramus 

 of the mandible. 



Width of bill. — Measured with dividers at the widest point near the end 

 of the bill ; at base ; at point of greatest width ; or at the posterior end of 

 the nail where this coalesces witli the culmen. 



Length of the nail of bill. — The chord of the dertrum. measured in a 

 straight line from its tip to the point where it coale.-ces with the culmen. 



Inner toe with claw. — Measured witli dividers along the upper side from 

 the middle of the joint between the metatarsus and the inner toe, in a 

 straight line to tlie tip of the claw. 



Tlie writer is indebted to Dr. ('. W. lUcliniond for a nunil)cr of references 

 to generic names cited in this paper. 



Fulix SUNDEVALL. 



Marila OKEN, Isis (von Oken), 1817, Heft VIII, col. 1183 (nomen 

 nudum). 



Fulix Sundevall. K(rngl. Vetensk.— Acad. Handl.. for 1835 (183()). p. Il2!) 

 (proposed for "Anates lobatae," with no species mentioned) (type by sub- 

 sequent designation [Baird. Brewer, and Ridgway, Water Birds North 

 Amer., II, 1884, p. 17]. Anas marila Linnaeus). 



Marila BONAPARTE. Compt. Rend. I'Acad. Sci., XLIII, Sept. 30, 1856, p. 

 651, (Reichenbach, MS.) (type by tautonymy, Atuis frenata Sparrman [ = 

 Anas marila Linnaeus]) (nee Marila Reichenbach quae Aithyia Gloger). 



■Nettarion BAIRD. Rep. Explor. and Surv. R. R. Pac, IX. 1858, p. 790 

 (in text) (substitute name for the group to whieli Fulix Sundevall is 

 simultaneously restricted) (type by subsequent designation [Baird, Brewer, 

 and Ridgway, Water Birds North Amer., II, 1884, p. 17], A)ia.^ marila Lin- 

 naeus). 



Marila STONE. The Auk, XXIV, No. l>. April, 1907. p. 101 (Oken MS.) 

 (tyi>e by original designation and monotypy, Ana.'i marila Linnaeus) (nee 

 Marila Reichenbach ) . 



Description. — Wing 4 1/2-5 times the length of exposed culmen ; bill rela- 

 tively but little flattened terminally, its width near end 11/10-13/10 times 

 its width at base, its tip squarish, its width at posterior end of nail 2 1/2- 

 3 1/3 times the length of its nail : tip of maxilla much hooked : nail of bill 

 broad and triangular, or narrow and strap-like; height of bill at extreme 



iThe Auk, XXXVI. No- 4. October. 1919, pp. 460-463. 



