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ONE of the most important discoveries in Paleontology has just been made by Professor H. Oredner of Leipzig, well known by his publications on the Stegocephalia of the Permian of Saxony.* This discovery consists of a series of nearly complete skeletons of a reptile from the lower Permian (Rothliegendes). This reptile, with the exception of Stereosternum Oope, from the Oarboniferous (~) of Brazil, is the oldest yet known. Professor Oredner calls it Palmolwtteria from the close resemblance to EIatteria from New Zealand, the only living member of the Rhynchocephalia. But since Hatteria is preoccupied by Sphenodon, t this new form really ought to be called Palmosphenodon. It is placed by Professor Oredner among the Sphenodontidre, but it has-to be considered as the type of a distinct family, which may be called the Palmohatteriidm, or Palmosp!wnodontidm, in case the name PaZmosplu1nodon shall be admitted by Oredner. Clwr'(tcters if tlw Palmolwtteriidm. -Skull resembling Spltenodon,. lacrymal free from prrefrontal; bones showing centers of ossification, like those of Stegocephalia; interclavicle

Thermoluminescence, IR‐absorptions and IR‐stimulated spectra of very shallow (0.01 to 0.2 eV) traps in variously doped ZnS single crystals were measured in the temperature range of 5 to 100 K. A special monochromator cooled by liquid helium was developed in order to protect the sample from stray IR radiation. The depth of the traps investigated here is approximately the energy of optical and of the most energetic acoustical phonons in ZnS. The electrons released from these traps by IR absorption either make luminescent recombination with excited activator terms or may be retrapped with phonon emission. The retrapping probability is high if the energy ot be transferred to the lattice is equal to the energy of a combination of phonons which can be readily created at the particular temperature. This retrapping probability can be obtained by comparing absorption and IR‐stimulation measurements. Detailed analysis provides values of optical and thermal trap depths as well as the effective mass and the polarisation energy.

Oxygen free-high conductivity copper was oxidized to CuO and Cu20 over the temperature range 600~176 in pure oxygen (0.026-20.4 arm). Correlation of weight gained, W, and time, t, was achieved through the use of the equation:Kp is the parabolic rate constant and K~ is a constant. Pressure variation had no effect on the magnitude of K~, if the ratio Cu20/CuO was constant. Quantitative x-ray diffraction analysis of the scale disclosed approximately 96% Cu~O at high and low pressures for temperatures above 800~ Below 750~ high pressure coatings contained 90% Cu~.O, while subatmospheric coatings continued to assay about 96% Cu:O. Temperature correlation was obtained by means of the equation: Kp = A exp (--Q/RT), where Q = 37,000 cal and K~ is the average value for a Cu20/CuO ratio of approximately 96/4 (700 ~ ~000~

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