3 
the last week of April, visiting the Maya ruins of Chichen 
Itza and Uxmal near Merida, and the island of Cozumel with three 
members of the field par ty--Daiber , Rehder, and Schmitt. The 
others--Bousf ield and Clarke, had to return home on April 24 
because of other commitments. 
Five weeks and a day marked the actual span of this Yucatan 
expedition from the time we quit the restless, open roadstead 
of Progreso on March 26 until we left Mexican waters on April 30 
for Georgetown, Cayman Islands, where, after a 74-hour passage, 
we parted company with our chartered 70-foot auxiliary schooner 
on May 6, to return to Washington. 
In Progreso the purchase of supplies beyond those obtained 
in Miami and an additional and heavier anchor that the winds 
here warned us might be needed left very limited time for col- 
lecting. This was accomplished chiefly by Drs . Clarke and 
Daiber in and about the nearby lagoon and mangrove swamp. Some 
shells were picked up by Dr. Rehder, who scoured the beaches. 
At Isla Mujeres , our next port of call, four profitable days 
were spent, March 28 through 31, on reefs, shoals, turtle grass 
flats, and stands of mangroves which were very reminiscent of 
the Florida Key area in faunal aspect. Corals, gorgonians , 
sponges, mollusks , crustaceans, fish, and algae were gathered 
in fair quantity within the spacious harbor and along the outer 
reaches of the island of Cozumel. We left for San Miguel, 
island of Cozumel, shortly after sun-up April 1 and dropped 
anchor off the pier there the same evening at half past six. 
