10 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 12 



from them is quite impressive and drifts far down wind, so that it is quite 

 offensive on shipboard, but once ashore the interesting bird groups soon 

 make one forget the smell. Of vascular plants there were none visible, and 

 probably no other land plants, but along the edge of the water there was 

 a little growth of algae. What there was, was stunted, but Chaetomorpha 

 antennina, Laurencia, and other genera could be recognized. Considerable 

 dredging was done about these islands, particularly in 1934, but the hauls 

 did not yield any profit in algae. 



Oaxaca, Mexico 



Bahia Chacahua1° 



From the anchorage at Ba. Chacahua a long open beach extends to the 

 west for miles. On the other side lies a rocky point with surf beating over 

 the outlying rocks and the point itself. Behind the beach there is a con- 

 siderable mangrove-bordered lagoon, fed by a stream draining the land 

 behind, and in turn drained to the sea. At the time of the Hancock Expe- 

 dition visit in 1939 no scientific work could be done on the point. This 

 appears to be the usual condition here. However, a landing was effected 

 on the beach near low tide, and the accessible shore line was investigated. 

 There was a considerable growth of Enteromorpha lingulata on Rhizoph- 

 ora roots and E. flexuosa on dead sticks near by, but the expected vege- 

 tation of Bostrychia, Caloglossa, and Catenella was apparently absent. 

 There was nothing washed ashore on the beach, and the rollers broke on 

 the rocky point with such violence, even when the sea was quite calm off- 

 shore, that there was little promise of opportunity to work over that terri- 

 tory at any time. Dredging with the launch offshore yielded no algae. 

 Embarkation with the ship's skiffs later in the day after the tide had risen 

 proved impossible because of the increased violence of the surf. There was 

 a small group of huts at the edge of the woodland behind the beach, and 

 the men from this settlement took the scientific party off in a huge dugout 

 canoe late in the afternoon, quartering the great rollers most skillfully. 



Tangola-Tangola^i 



The shore line at Tangola-Tangola consists of headlands of a medium 

 coarse granite, alternating with beaches of dull whitish quartz sand, and 

 with rocky islets offshore. No streams emptied into the bay, but behind a 

 barrier beach the land was marshy. The landing was easy, as the bay is a 



iOJbid., p. 153, pi. 73, figs. 156a, b. 

 11/*/^., p. 153, pi. 73, fig. 155. 



