NO. 1 TAYLOR: PACIFIC MARINE ALGAE 21 



wind is not from the west. Rock falls have produced near the northern end 

 of the cliffs a talus slope which is a quite practicable landing place, al- 

 though by no means completely protected from the sea. The rough rocks 

 and cliff ledges were evidently a favorite nesting place for birds, particu- 

 larly the frigate birds, the males of which at the time of our visit were 

 resplendent with the huge inflated red neck pouches of their nesting sea- 

 son. Except for lichens no land plants were noticed here ; however, things 

 on high ledges and along the ridges would have been inconspicuous from 

 the shore. 



The attached algal vegetation was not very considerable. The only 

 common species were a small form of Caulerpa peltata, the undescribed 

 Bryopsis galapagensis, Hildenbrandia, and a small Rhodophycean forming 

 mosslike mats on the rocks. Dredgings produced a little Plocamium and 

 Carpomitra from presumably 183-270 meters' depth. 



ISLA ISABELA^O 



The next three relatively small islands of the archipelago, I. Pinta 

 (or Abingdon I.), I. Marchena (or Bindloe I.), and I. Tower, lie a 

 little to the northeast of the larger ones and were not visited in 1934. Isla 

 Isabela (Albemarle I.), which was visited at various places, is by far the 

 largest. The Equator passes across the northern portion of the somewhat 

 distortedly boot-shaped island, where there is one of the four peaks which 

 reach at least 4,000-feet elevation. The shank portion runs southeast, the 

 foot portion southwest, with the junction constricted and relatively low. 

 The chief mountains are volcanic, and the one in the southwest section is 

 the highest in the islands, 5,000 feet, but four others are from 4,320 to 

 3,780 feet, and are conspicuous features, as in lesser degree are many 

 smaller cones and hills. 



The first landing was made on the northeast corner of the island near 

 Albemarle Point. Inland the ground was high, but the shore was locally 

 accessible, and on the sandy beach appeared occasional sea lions. Behind 

 the shore there was a considerable mangrove-fringed, brackish lagoon. 

 This first received attention ; the growth on the roots included Calothrix 

 as well as the expected Rhodophyceae. The rocks in the lagoon showed a 

 growth of Hildenbrandia, with various ]\Iyxophyceae and especially the 

 same Calothrix about the border. Another inland salt-water pool con- 

 tained an undescribed Galaxaura, for which genus this is an unusual loca- 

 tion. 



^oibid., p. 219, pis. 110-113. 



