The Zoologist— April, 1870. 2087 



valuable memoir on the genus in the 'Isis,' as above cited. It has 

 been occasionally confounded with glacialis, Leach, which is quite a 

 different bird. It is a Nortli Pacific and Arctic species, not recorded 

 from the Atlantic. Excellent specimens are contained in the Piiila- 

 delphia Academy and Smithsonian Inslilution : one of these in the 

 collection of the last-named is probably the original of Audubon's 

 plate of " glacialis." 



Genus Lunda, Pallas. 



With somewhat the general aspect of Fratercula. No horny 

 appendages to the eyelids. No furrow in the plumage behind the 

 eyes. An extremely elongated crest on each side of the head. 

 Upper mandible with only an indication of a basal ridge along its 

 sides; the culmeu divided into two parts, whereof the basal is sur- 

 mounted by a prominent widened ridge, ending abruptly; sides of 

 upper mandible with three well-marked curved grooves, widely 

 separated, whose convexity points backwards. Under mandible with 

 its sides perfectly smooth, and its base very convex, not concave. 

 Rictus very sinuate; gonys slightly curved. Feet, wings and tail, as 

 iu Fratercula. 



The above diagnosis indicates only the principal features wherein 

 this genus— or subgenus, as might be contended with some reason- 

 differs from Fratercula. Except in the bill, eyelids and crest, the 

 genus is exactly Fratercula, but the difference in these points seem 

 sufficient to warrant generic separation. 



Lunda cirrhala, Pallas.— Habitat : Arctic Ocean; Coasts and 

 Islands of the North Pacific; on the American side south to Cali- 

 fornia; of occasional occurrence on the Atlantic Coast of North 

 America (Kennebec River, Audubon : spec, obtained; Bay of Fundy, 

 in winter, Verrill), Spec, in Mus. Acad. Philada., Mus. Smiths., 

 Cab. Geo. N. Lawrence, author's Cab., etc. 



Bill very large and heavy, much longer than the head or middle toe 

 and claw, its depth at base three-fourths its length; excessively 

 compressed, the sides nearly pei-pendicular, except at base of upper 

 mandible, where they bulge a little. Upper mandible divided into 

 two portions ; the basal part with its sides perfectly smooth, bounded 

 along the base by a shght oblique ridge of subcorneous tissue, which 

 is scarcely, however, elevated above the common plane, and is 

 minutely studded with points; bounded above by a prominent v\ide 

 ridge formed of an accessory corneous piece w'hich surmounts this 



