L O N & I P E N N E S.
KAMII.i 1- LA lì 11) .fi. ■
SUB-FAMILY LARINGE.
GENUS LARUS.
Larus. Linn. Syst. Nat (1735.)
69. LARUS OALIFORNIOUS. | 1; Vol. II. Plate LII.
70. — OCCIDENTALIS. |
71. —| BRACHYRHYNCUS. | y ol n Platc u n .
72. p f S § | HUTCHINSI! }.
73. GLAUCESCENS. :
The Glaucus Gulls resemble each other in many particulars, and one might be excused if the supposition should occur, that they
but presented different stage, of rhmmgc o f the «m e q,eeio. Thu, w , have the I . Hitchinsil, which | pure white, suececded
b_ j, gi„ucus, „ho white, with « mantle' o f the lightest possible blue; then E. Lcucoptenis, pearly blue on mantle and pnmanes,
the latter tipprf with white; this followed by L. Chnleopterus, which resemble, the prohion, spcoie,, blit has the wings o f L. Glanccsecn,,
which has a pearl-blne mantle and blackidi primaries, spotted and tipped with white. Slight rnriaMon, between these different form,
would easily establish an unbroken chain from the white L.' JHutehiDsii to the dark L. Glauccscens.
As the principal differences between L. Glaiicesceps and L. Gbrac, consist^;.the primaries and dark mantle of the former, it did
not seem necessary to devote a plate to represent it, and therefore I give illnsttalions o f the primaries of the nulurnl rise o f the
two'1- species for comparison. The specimen o f . L. Glaueeseens came from Euget sound, and was nnmliered, «,084. I am indebted
to the Secretaries of the Smithsonian Institution for. the ,loan of tire example to .be figured in this work.
74. LARUS B0REAL1S.=L. ARGENTATUS.
L ards Borealis. Brandt. Mus. Petropolit. Brucb. Monogr.
L ab. in Journal fur Ornith. (1853). p. 101. sp. 19.
This is the Herring Gull of the West coast, and judging from the specimens I have been able to examine, I should consider it to be
identical with the Larus Argentatus of the Eastern shores of the continent.
GENUS RISSA
Jlissa. Leach. Steph. Gen. Zool. Vol. XIII. (1825.) p . 180.
75. RISSA KOTZEBUI.) Yol n plato L1y
76. — NIVEA. J
SU B -F AM IL Y L E S T R ID IN iE .
GENUS STERCORARIUS.
Slercorarim. Briss. Om. (1760). Vol. VI. p . 149.
77. STERCORARIUS CATARRACTES. Vol. II. Plato LV.
S U B -F A M IL Y S T E R N IN iE .
GENUS THALASSEUS.
Thalasseus. Bote. Isis. 1822. p . 563.
78. THALASSEUS CASPIUS. Vol. II. Plate LV!
Sten
GENUS STERNA
i. Linn. Syst. Nat. (1748).
79. STERNA FORSTER!
Sterna F orsteri. Nutt. Man. Vol. U. (1834). p. 274.
The chief difference between this species ,and its ally, S. Hirundo, which it very closely resembles, is exhibited in the different
distribution of white upon the webs of the tail feathers, and the relative lengths of thè outer feathers, as represented in the
accompanying engraving.
GENUS HALIPLANA
mäipiana. Wagl. Isis (1832.) p. 1124.
80. HALIPLANA DISCOLOR. I Vol. H. Plate LVI!
FAMILY II.— PEO C E E LA B I ID J E .
SUB-FAMILY DIOMEDEINiE.
GENUS DIOMEDEA
JDiomedea. Linn. Syst. Nat (1758.) p. 132.
8 ! DIOMEDEA CHLORORHYNCHUS. Vol. I ! Plate LVIII.
SUB-FAMILY PROCELLARINiE.
GENUS PULMARUS.
Fulmarus. Leach. Steph. Gen. Zool. (1825). Vol. XIII. p . 233.
82. FULMARUS PACIFICUS.=FULMARUS GLACIALIS.
P rocellaria P acifioa. Aud. B. Am. Vo! VH. (1844). p- 208. Lawr. B. N. Am. (1858). p. 826.
Closely allied to F. Glacialis, and may be considered as a local race of that species, inhabiting the Pacific coast. The differences
betweeu the two birds, to use the words of Dr. Codes, “ might bo held as indicative of the extreme of variation of a single changeable
type,” although he seems inclined to consider.it as a species.
GENUS THALASSOICA
Tha/assolca. Reichenb. Syst. Av:
THALASSOICA GLACIALOIDES.
loides, Ssimi. Illust. S. Afric. B. Vol. ! p. 5l.
rostris. Aud. B. Am. Vol. V I! (1844). p. 210.
lie very slight differences existing
ted of the head, the size of life.
the F. Glacialis,
MSS ‘ I S . , ■