thick and dips 20 S. 50 W. From here on there is an alternation of heavy coyl. and large masses of shale beds, more or less bent and crumbled up until we reach the lighthouse factory in the dark fog cave on the south side of the head. Here we find a man of shale 100 feet long by 20 feet thick dipping 75 S. 40 E. Each of the three frigus at the end of the head are formed of heavy coyl concretos. Between the first two is the largest single "bottle" of Hale seen. It stands on edge dipping 70 S. 35 E. and is clearly exposed for 500 feet. On the west end of the head above the last frigus the Cow Head series becomes sandy and then banded but below these layers are others of heavy coyl. forming the reef along the head below the lighthouse. The dip here is 40 S. 40 E. "To sum up: 1. Along the south side of the head there are several great masses of thin-bedded shale strata yielding large Beidmantum fossils, embedded in a very coarse li. coyl., derived from higher layers of the Beidmantum. 2. These hale masses are of relatively soft and incompetent strata, are weathered into caves or low strips between layers of li. coyl., whereas the li. layers of the Redmantrum are heavy and resistant so that we have usually seen them forming hills or cliffs. 3 The great masses of geoplolithium shale are from 100 to 500 long and from 20 to 100 feet thick whereas the largest piece of the associated li. seen was about 12 feet in largest diameter [I saw one there 20 foot long], and nearly all are less than half as much.