NO. 1 TAYLOR : PACIFIC MARINE ALGAE 9 



Jalisco, Mexico 



Bahia Tenacatitas 



Both the 1934 and 1939 Hancock Expeditions anchored in Ba. Tena- 

 catita. Both found this an entirely unprofitable place for algae, either 

 along the shore or by dredging. Apparently the rocks were of a type un- 

 suitable for the attachment of algae, for the place did not look unfavorable 

 from a distance. Only one number was secured, an undetermined coralline 

 on a rock. A most interesting and beautiful grove of oil-nut palms occu- 

 pied the head of the bay, and with other features made the land vegetation 

 attractive ; the grove was apparently not being maintained in good condi- 

 tion at the time of the later visit. 



Guerrero, Mexico 



Bahia Petatlan and White Friars Islands^ 



The mainland station on the shore at Ba. Petatlan was not a very 

 productive one. Collecting in the littoral was only possible near high tide 

 line. The shore was rocky, with smooth greenish-discolored boulders. In 

 the water there was an abundance of smooth Lithothamnieae, which 

 could not be secured in quantity sufficient for study, and also Ralfsia, 

 which could not be gotten off in good pieces, but no evident Hilden- 

 brandia. With this encrusting element there were Sargassum and Chaeto- 

 morpha in some quantity, and more especially cushions of Jania mexicana 

 with Centrocerns and the larger Amphiroa peninsularis. Little dredging 

 was done about the bay, and only a few Lithothamnieae were secured. 



Offshore from Ba. Petatlan there lies a spectacular series of about 

 seven more or less separate bold, high rocky islets in a row, called the 

 White Friars, of which four are of a considerable size. For the most part 

 they rise in steep cliffs from the edge of the water ; the rock appears to be 

 of volcanic origin, and there are no beaches or practicable talus slopes 

 above water. In rough weather quite impracticable, in very calm weather 

 it is just possible to leap ashore in one or two spots when there is a 

 momentary intermission in the breaking of the surges. In 1934 this was 

 not attempted, at least by the botanist, but in 1939, with several members 

 of the party, he landed on one of the larger islets. 



These islets are brilliantly white with excrement, being a notable bird 

 rookery, with boobies, terns, and bo'sun-birds predominating. The reek 



»Ibid., p. 151, pi. 68, fig. 147a. 

 9 Ibid., p. 152, pi. 69. 



