(Contribution from the Zoological Laboratory of Pomona College.)
[Studies in the Comparative Size of the Red Blood Corpuscles of Birds]
CHI TSAU WANG
The blood corpuscles of a large number of vertebrates were studied at Laguna Beach during the past summer. Some of the sizes of cell and nucleus are given below. The blood was obtained as fresh as possible; in no case was the blood obtained longer than twenty-four hours after death. The corpuscles were measured by the ocular micrometer and checked by the aid of a camera lucida.
| Common Name | Scientific Name | Average Size of Corpuscle Microns | Average Size of Nucleus Microns | ||
| Length | Breadth | Length | Breadth | ||
| Western Gull | Larus occidentalis | 14.70 | 8.82 | 6.53 | 3.27 |
| Heermann Gull | Larus heermanni | 14.05 | 7.84 | 6.21 | 2.77 |
| Great Blue Heron | Ardea herodias | 13.72 | 8.82 | 6.53 | 3.27 |
| Red-breasted Merganser | Mergus serrator | 13.07 | 7.51 | 6.86 | 2.77 |
| Arkansas Kingbird | Tyrannus verticalis | 12.77 | 9.47 | 5.55 | 3.10 |
| California Road Runner | Geococcyx californianus | 12.09 | 9.15 | 5.27 | 3.27 |
| Long-billed Dowitcher | Macrorhamphus griseus scolopaceus | 12.41 | 8.49 | 5.24 | 2.46 |
| Least Tern | Sterna antillarum | 11.76 | 8.46 | 6.21 | 2.94 |
| Semipalmated Plover | Ægialitis semipalmata | 11.43 | 6.21 | 5.24 | 2.77 |
| Arizona Hooded Oriole | Icterus cucullatus nelsoni | 11.27 | 8.49 | 4.41 | 2.94 |
| San Diego Song Sparrow | Melospiza melodia cooperi | 10.94 | 8.33 | 5.27 | 2.53 |
| Least Vireo | Vireo pusillus pusillus | 10.45 | 9.47 | 5.55 | 2.77 |
| California Woodpecker | Melanerpes formicivorus bairdi | 10.45 | 6.53 | 5.24 | 2.77 |
| Belding Marsh Sparrow | Passerculus beldingi | 10.08 | 6.86 | 4.90 | 2.77 |
| Willow Gold Finch | Astragalinus tristis salicamans | 9.80 | 6.79 | 6.04 | 2.94 |
| California Horned Lark | Otocoris alpestris actia | 9.47 | 6.21 | 4.25 | 2.12 |
| Western Lark Sparrow | Chondestes grammacus strigatus | 8.49 | 5.55 | 5.24 | 3.10 |
(Contribution from the Zoological Laboratory of Pomona College)