782 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Cerorhinca occidentalis Bonaparte, Ann. Lye. Nat. Hist. N. Y., ii, 1828, 428 



("western coast of America"; cites "Am. Orn., iv, pi."). — Lesson, Traite 



d' Orn., 1831, 641.— Nuttall, Man. Orn. U. S. and Can., Tvater Birds, 1834, 



538. 

 Ceratorrhina occidentalis Audubon, Birds Am., foL ed., pL 402, fig. 5. 

 Ceratorhijncha occidentalis Audubon, Orn. Biog., v, 1839, 104. — Bonaparte, 



Geog. and Oomp. List. 1838, 66. — Ridgway, Cat. Aquatic and Fish-eating 



Birds, 1883, 40. 

 Uria occidentalis Audubon, Synopsis, 1839, 349; Birds Am., 8vo. ed., vii, 1844, 



264, pi. 471. 

 Clerorhina] occidentalis Gray, Gen. Birds, iii, 1848, 639. 

 Chimerina cornuta Eschscholtz, ZooL Atlas, Heft iii, 1828, 2, pi. 12. — Bureau, 



Bull. Soc. Zool. France, iv, 1879, 43, pi. 4. — Dybowski, Orn. Centralbl., 



1882, 28 (Kamchatka). 

 Ccrorhina orientalis [lapsus for occidentalis? ] Brandt, Bull. Ac. St. Petersb., 



ii, 1837, 348. 

 [?] Alca tarda (not of Linnaeus) Temmixck and Schlegel, Fauna Japonica, 



Aves, 1842, 125. 

 Cerorhina suckleyi Cassin, in Baird, Rep. Pacific R. R. Surv., ix, 1858, 906 (Fort 



Steilacoom, Washington; coll. U. S. Nat. Mus.; = adult without knob on 



bill). — Baird, Cat. N. Am. Birds, 1859, no. 718. — Cooper and Suckley, 



Rep. Pacific R. R. Surv., xii, pt. ii, 1860, 284 (Fort Steilacoom; crit.). 

 Sagmatorrhina suckleyi Coues, Proc. Ac. Nat. Sci. Phila., 1868, 32, figs. 4, 5 



(monogr.). 



Genus FRATERCULA Brisson. 



Fratercula Brisson, Orn., vi, 1760, 81. (Type, Alca arctica Linn.Tus.) 

 Mormon Illioer, Prodr. Orn., 1811, 283. (Type, Alca arctica Linnieus.) 

 Larva Vieillot, Analyse, 1816, 67. (T^-pe, Macareux = Alca arctica Linn'inia.) 

 PuffiniLso, (not of Brisson) " Will[ughby] " S. D. W., Analyst, iii, no. xiv, Jan., 

 1836, 211. (Type, P. flavirostris S. D. W. = Alca arctica Linnseus.) 



Large Fraterculiiife (wing 153-188 mm.) with the deciduous 

 supra-nasal saddle diminishing in width toward culmen, its an- 

 terior outline convex; basal lamina of bill of equal width through- 

 out or slightly wider above than below; maxillary grooves convex 

 anteriorly; eyelids with horny appendages; head without orna- 

 mental plumes, and under parts white. 



Bill extremely deep and compressed, its depth at base much more 

 than twice its width at same point and greater than its length from 

 rictus; culmen arched (sometimes from extreme base), much longer 

 than middle toe without claw; gonys convex proximally, straight 

 or sometimes even slightly concave distally, much longer than tar- 

 sus; tomia straight to very near tip, that of maxilla decurved ter- 

 minally (the tip of maxilla slightly but distinctly uncinate), that 

 of mandible abruptly deflected terminally; middle portion of sides 

 of both maxilla and mandilJe ol)lique1y grooved and ridged, the 

 grooves and ridges slightly convex distally (anteriorly); nasal cuirass 

 diminishing rapidly in width toward culmen, where surmounted 



a Also Palmer, Analyst, iv, 1836, 97. (Latinized from Puffin.) 



