The few published accounts of antlerlessness in male cervids implies a comparative scarcity of this phenomenon. Accordingly the cases noted by the writers in mule deer males ( Odocoileus hemionus hemionus ) may deserve mention. We are indebted to Dr. George Wislocki of the Harvard Medical School for a reference to antlerless adult male deer recorded in German literature. The following is a direct quotation from his letter of December 8, 1953. “Rorig in 1907 (Gestaltende Correlationen zwischen abnormer Korperkonstitution der Cerviden und Geweihbildung derselben: Archiv f. Entwicklungs-mechanik der Organismen, Bd. 23) on pages 8–10 and 13–14 lists a number of instances known to him or cited in the literature of deer without antlers but with normal genitalia. His compilation relates almost entirely to Cervus elaphus and Capreolus . He said that he found no evidence of anomalies of any sort in the reproductive organs, and there was good evidence that the animals were fertile and sexually active. In one case (and possibly two) the condition appeared to be hereditary because other animals of the same character were observed in the same locality. Adult males with total absence of antlers and abnormal genitalis are extremely rare, according to Rorig. On page 26 he cites an animal of this sort with small cryptorchid testes, and gives fragmentary data on four other cases.” Seton (lives of game animals, Vol. 3, Part 1, p. 239, 1929) states, “I have never seen one (antlerless adult buck) but I have often heard of them and find several cases recorded.” However, he actually cites but two references (J. B. McW., Forest and Stream 46: 454, June 6, 1896; and F. H. K., Forest and Stream 47: 5, July 4, 1896). The present writers have read only the latter reference in which the writer claimed to …