326 Wiaconsin Academy of Sciences, Arts, and Letters. 



region. This species was brought to this island many years ago 

 by the tortoise hunters who made a temporary settlement here, 

 and who introduced it among other domesticated plants. They 

 were planted along the trail, leading into the settlement, by 

 Captain Thomas Levick of Chatham Island, on one of his period- 

 ic visits to this place. He hoped to permanently mark the trail 

 by this means, but judging from the difficulty we had getting 

 around these thickets and finding the trail again, his method of 

 marking it was rather too eft'ective. They grow so thickly that 

 they have driven out the smaller vegetation in places. 



The country around 650 ft. elevation is heavily forested with 

 trees of Bursera graveolens, Piscidia Erythrina, Pisoiiia flori- 

 bunda, and Zanthoxylum Fagara. This forest is open in places 

 and the ground is covered with occasional bushes and ferns. 

 Above 700 ft. elevation the forms which occur abundantly on the 

 lower parts, disappear. The forests above this are made up of 

 large trees of Pisonia floribunda, Psidium galapageium, Scalesia 

 pedunculata, and Zanthoxylum Fagara, the last of which forms 

 trees 25-30 ft. high, usually heavily covered with mistletoe. The 

 undergrowth is usually dense in these forests and is composed 

 largely of bushes of Erigeron tenuifolius, Psychotria rufipes, 

 Tournefortia rufo-sericea, and several species of ferns and herb- 

 aceous plants. Epiphytes are common, consisting of ferns and 

 orchids, lonopsis utrieularioides. Conditions similar to the 

 above, continue to an elevation of 1,000 ft. as high as this side of 

 the island was explored. From a tree at this elevation, the coun- 

 try appeared to change but little for several miles further in- 

 land. 



We visited this place during July, and as it was the last time 

 that we expected to stop on this island, we made a rather deter- 

 mined effort to get farther into the interior than we had done be- 

 fore. We hoped to follow the trail in as far as the old settlement 

 where it is reported that water can be found, and where there 

 are a number of domesticated plants growing which are suitable 

 for food. We expected to camp at the settlement and try to 

 work inland from there. We lost the trail at 1,000 ft., however, 

 and had to turn back as our supply of food and water was not 

 sufficient to justify us in going farther. The only evidences of 

 former habitation found, was a number of lime trees near where 

 we lost the trail. We learned afterwards that these were but a 

 short distance away from the settlement, but as everything was 



