. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. n BULLETIN OF iSBUARY mWYORK nr i_j p «)TANicAL ^ ^ ^ '-^ .J9AMEN Southern California Academy of Sciences LOS ANGELES, CALIFORNIA. Vol. L September-December, 1951 Part 3 CONTENTS Page, THE OLFACTORY SYSTEM OF TAILED AMPHIBIA William A. Hilton . . 119 SYMPATRIC POPULATIONS OF BATBACHOSEPS ATTENUATUS AND BATRACHOSEPS PACIFICUS IN SOUTHERN CALIFORNIA Charles H. Lowe Jr., and Richard G. Zweifel 128 THE ISOPOPAN GENUS lAIS (CRUSTACEA) R. J. Menzies and J. Laurens Barnard 136 DESCRIPTIONS OF TWO NEW
. Bulletin of the Southern California Academy of Sciences. Science; Natural history; Natural history. n BULLETIN OF iSBUARY mWYORK nr i_j p «)TANicAL ^ ^ ^ '-^ .J9AMEN Southern California Academy of Sciences LOS ANGELES, CALIFORNIA. Vol. L September-December, 1951 Part 3 CONTENTS Page, THE OLFACTORY SYSTEM OF TAILED AMPHIBIA William A. Hilton . . 119 SYMPATRIC POPULATIONS OF BATBACHOSEPS ATTENUATUS AND BATRACHOSEPS PACIFICUS IN SOUTHERN CALIFORNIA Charles H. Lowe Jr., and Richard G. Zweifel 128 THE ISOPOPAN GENUS lAIS (CRUSTACEA) R. J. Menzies and J. Laurens Barnard 136 DESCRIPTIONS OF TWO NEW SPECIES OF MARINE GASTROPODS FROM WEST MEXICO AND COSTA RICA Leo George Hertlein and A. M. Strong ..... 152 A NEW SONORELLA FROM THE CHIRICAHUA MOUNTAINS, ARIZONA Wendell O. Gregg 156 FOUR SOUTH AMERICAN GEOMETRIC MOTHS APPARENTLY UN- DESCRIBED John L. Sperry ... 159 THE FRAGILITY FACTOR FOR TRYPANOSOMA CBVZI IN EXPERI- MENTAL CHAGAS' DISEASE Sherwin F. Wood 164 WHAT SIGNIFICANCE DEPTH ? PhilC. Orr 167 ELZA ELLSWORTH HADLEY . , 172 Issued December 27, 1951. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Southern California Academy of Sciences. Los Angeles, Calif. : The Academy
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