NO. 10 DAWSON : MARINE ALGAE, GULF OF CALIFORNIA 355 



Sta. 1079-40. Pond Island at south end of Angel de la Guardia Island, Gulf of 

 California, Feb. 4, 1940. Shore collecting at medium low tide (middle to 

 upper littoral). Rocky shore collecting done on the outside of Pond Island 

 toward the south ; lagoon collecting along borders of the "pond" inside. 

 Surface 16°C. D. 399-430. 



Sta. 1080-40. 4 miles off Pond Island, south of Angel de la Guardia Island, Gulf 

 of California, Feb. 5, 1940. Dredging in 124-152 meters on coarse sand 

 bottom. Algae present but probably brought from shallower depths. Surface 

 16.5°C. D. 431-432. 



Sta. 1081-40. Two miles north of Isla Partida, Gulf of California, Feb. 5, 1940. 

 Dredging in 110-116 meters. Rock bottom. The algae were taken from the 

 surface of the rocks although they had been broken loose and were worn 

 by the action of the net. Surface 17.2° C. D. 433. 



Sta. 1083-40. San Esteban Island, Gulf of California, Feb. 5, 1940. Shore col- 

 lecting on south shore among rocks and boulders. Sargassum abundant in 

 lower littoral. Rocks mostly covered in upper and middle littoral with 

 Herposiphonia. Gigartina abundant, also Ulva and Rhodoglossum. Sur- 

 face 18.2°C. D. 434-468. 



Sta. 1087-40. Ensenada de San Francisco, near Guaymas, Sonora, Feb. 7, 1940. 

 Dredge haul in 30-36 meters. Surface 18.9°C. D. 469-475. 



Sta. 1091-40. Puerto San Carlos, just north of Guaymas, Sonora, Feb. 8, 1940. 

 In 3-8 feet of water near rock-shingle beach. Quiet water of shallow bay. 

 Surface 18.9°C. D. 476-479. 



Sta. Dawson 25-40. Same locality and date. Mangrove swamp near small fresh- 

 water stream mouth. Shallow tidal channels. D. 480-481. 



Sta. Dawson 26-40. Same locality and date. Stagnant pools from fresh-water 

 streamlets near bay. One below Titas de Cabra peak, the other above 

 Mangrove swamp. D. 482-483. 



Sta. 1092-40. Just outside Guaymas Harbor, Catalina, Feb. 9, 1940. Partly on 

 sandy beach of the lagoon, partly on reef rocks. Surface 17.7°C. Uha and 

 Hypnea exceedingly common on the sand. Padina forms almost a pure 

 stand over many yards of more rocky bottom. Sargassum not present except 

 as immature stages on the reef. Only middle littoral exposed, however. D. 

 484-502. 



Sta. 1093-40. Puerto Escondido, Lower California, Feb. 10, 1940. Dredging in 

 16-28 meters over sand bottom. Surface 19-19.5°C. D. 503-515. 



Sta. 1096-40. Same locality, Feb. 11, 1940. Dredging in 28-40 meters over sand 

 bottom. D. 516-525. 



Sta. 1104-40. Agua Verde Bay, Lower California, Feb. 12, 1940. Rocky shore at 

 low tide. Most of collecting from small "rock pockets." Algae in general 

 scanty and nowhere luxuriant. No mature examples of larger species. Sur- 

 face 19.2°C. D. 526-551. 



Sta. 1100-40. Same locality, Feb. 12, 1940. Dredging in 20-40 meters. D. 552-561. 



