The Half-Mammals of DixieGeorge Singleton, who's had many stories published in the best literary journals, has recently burst into the big time with appearances in Playboy, Zoetrope, The Atlantic Monthly, Harper's Magazine and Book. The stories in his new collection are wild and wooly or maybe we should say wild and half wooly. In any case, they're definitely not for the creationist crowd or for the laughter impaired. For example: A self described "primitive artist," getting