Greene, H. 1988 August 10 (continued) this morning but by the time we parked the peaks were in clouds, it was chilly and misty, and there was thunder. Rocks were very warm to the touch, however, and we saw a few Sceloporus viridatus and S. janorii active on rocks. We searched an E. facing #rock slide w/ scattered outcrops, oaks, and stunted conifers -- mostly open habitat w/ scattered thickets of some low shrubs. I encountered two ? Crotalus molossus w/in 5 min. at ~1135 hrs., both of whom I heard rattling before I saw them. The first was in a defensive coil, in the open but near rubble and shrubs. It rattled continuously, repeatedly crawled away (sometimes backwards, w/ the head in a short fme S-coil), and made short wide open strikes at least twice. Second snake was a few meters away, in a cavity between two adjacent rocks, and scarcely visible -- I would surely have passed except for the rattling (or gotten bitten reaching in the rocks' crevice?). The second snake is an even larger adult, equally aggressive -- also struck several time. Late proved to contain a rabbit, Sylvilagus (I release the first snake). On the opposite (~ W facing) slope (which is wooded w/ large conifers, has lots of old fallen logs on grassy slopes), Tony found an adult ? C. pricei under a large piece of