riot suitable for both Stylatractus universus and seudoemi1iania lacunosa. Although the cause of the extinction levels may be in doubt, the extinction clatums are nonetheless strati graphically important and useful. This research was supported by National Science Foundation grant oii 74-20109. References Emiliani, C., and N. J . Shackleton. 1974. The Brunhes Epoch: isotopic paleotemperatures and geochronology. Science, 183: 511-514. Gartner, S. 1972. Late Pleistocene calcareous nanofossils in the Caribbean and their interoceanic correlation. Palaeogeography, Palaeocliinatology, Palaeoecology, 12: 169-191. Gartner, S. 1973. Absolute chronology of the Late Neogene calcareous nanofossil succession in the equatorial Pacific. Bulletin of the Geological Society ojAmerica, 84: 2021-2034. Chinstrap penguin, Pygoscelis antarctica, at the edge of the Hays, J . D. 1965. Radiolaria and late Tertiary and Quaternary ice channel leading to McMurdo Station. This photograph history of antarctic seas. Antarctic Research Series, 5: 125-134. was taken on 26 January 1975 from the bridge of USCGC Hays, J. D. 1967. Quaternary sediments of the antarctic ocean. Glacier. In: Progress in Oceanography (Sears, M., editor), 4: 117-131. -1ays, J . D., and W. A. Berggren. 1971. Quaternary bounda- ries and correlations. In: Micropaleontology of Oceans (Funnell, B. M., and W. R. Riedel, editors). 669-691. Kennett, J. P. 1970. Pleistocene paleoclimates and foraminiferal biostratigraphy in subantarctic deep-sea cores. Deep-Sea Re- ice channel leading to McMurdo Station. The pen- search, 17: 125-140. guin was seen approximately 3 kilometers north of Miyajima, M. H. 1974. Absolute chronology of Upper Pleisto- USCGC Staten Island. cene calcareous nanofossil zones of the southeast Indian McMurdo Station from aboard Ocean. Antarctic Journal of the U.S., TX(S): 261-262. George A. Llano, Office of Polar Programs, Na- iyajima, M. H. In press. Subantarctic region, southeast Indian tional Science Foundation, and George M. Jonkel, Ocean: absolute chronology of upper Pleistocene calcareous Office of Migratory Bird Movement, U.S. Fish and nannofossil zones and paleoclimatic history determined from Wildlife Service, confirmed the sighting. silicoflagellate, coccolith, and carbonate analyses. Tallahassee, Florida State University, Sedimentology Research Labora- The only other documented sighting of a chin- tory, Department of Geology. Contribution, 42. strap in the McMurdo Sound area was at Cape hompson, P. R., and T. Saito. 1974. Pacific Pleistocene sedi- Royds in 1908 (Murray, 1909). Other chinstraps ments: planktonic foraminifera dissolution cycles and geo- in the Ross Sea have been observed at Cape Crozier chronology. Geology, 2(7): 333-335. (Sladen et al., 1968) and at Cape Hallett (Crawford, 1974). The chinstrap penguin is found primarily in East Antarctica, but over the last 20 years evi- dence has accumulated that it is in progress of con- siderably extending its range (Conroy, 1975). Chinstrap penguin at McMurdo Sound References Conroy, J . W. H. 1975. Recent increases in penguin popula- tions in Antarctica and the subantarctic. In: Biology of Pen- (Stonehouse, B., editor). Baltimore, University Park JAMES A. RAYMOND guins Press. 321-336. Scripps Institution of Oceanography Crawford, R. D. 1974. Chinstrap penguin at Cape Hallett. University of Ca1fornia, San Diego Notornis, 21(3): 264-265. La Jolla, Ca1fornia 92093 Murray, J . 1909. Appendix I, biology. In: The Heart of the Antarctic, Volume II (Shackletori, E. F-I., editor). London, Heineman. 258. Sladen, W. J . L., R. C. Wood, and E. P. Monaghan. 1968. The A single chinstrap penguin (Pygoscelis antarctica) USARP bird banding program, 1958-1965. Antarctic Research was observed on 26 January 1974 at the edge of the Series, 12: 213-262. September/October 1975 275.