SECRETARY’S REPORT 27 
Bay gained through fishing excursions. And in the Changuinola 
area Roy Roig gave important aid. A nesting colony of red-billed 
tropicbirds on Swan Cay in the Caribbean outside the entrance of the 
pass Boca del Drago, and another of Audubon’s shearwaters on Tiger 
Rock off Chiriqui Point at the end of the Valiente Peninsula, were of 
particular interest since these are the only locations known for these 
birds in the western Caribbean. ‘Through the help of Mr. Munch in 
providing a larger launch, collections were made for 2 days on the 
island Escudo de Veraguas 10 miles off the base of the Valiente 
Peninsula. A wren, a manakin, and a spiny rat obtained here are 
forms previously unknown to science, marked particularly by much 
larger size, compared to their relatives on the mainland. 
On return to the Canal Zone on March 10 Dr. Wetmore was occupied 
the following 2 weeks with further collecting in the savanna areas of 
Coclé and in the Province of Panama, including 3 days at La Jagua, 
east of Pacora, where the first cattle egrets to be collected in Panama 
were taken. ‘This heron has been seen here for 2 years past and ap- 
pears now to be fully established. Work for the season ended with 
return by air to Washington on March 29. 
During September 1957 and again in May 1958 Dr. G. A. Cooper, 
head curator of geology, accompanied by R. E. Grant, research as- 
sistant, carried forward his long-range research program of solving 
the stratigraphic sequence in the Glass Mountains, especially Leonard 
Mountain near Marathon in west Texas. Last fall they were for- 
tunate in establishing a direct paleontological sequence as well as ob- 
taining evidence to show that the big limestones in the Leonard 
formation join the basal formation to become a single limestone east 
of Sullivan Peak. In May they traced this particular key bed across 
the mountain. An effort was made to collect special material for in- 
clusion in the modernization of an invertebrate paleontological ex- 
hibit hall. In November 1957 Dr. Cooper delivered his presidential 
address before the Paleontological Society in Atlantic City, N.J. He 
spent several days in Boston the latter part of March examining and 
studying Silurian, Devonian, and Recent brachiopods at Harvard 
University and the Massachusetts Institute of Technology. 
From July 12 to August 9 Dr. C. L. Gazin, curator of vertebrate 
paleontology, and exhibits specialist F. L. Pearce prospected for and 
collected vertebrate fossils in the eastern, central, and western por- 
tions of the Bridger Basin around Green River and Lyman, Wyo. 
Good results were obtained between Smiths Fork and Blacks Fork. 
A rare skull and skeletal material of the Eocene horse Orohippus 
were recovered. Dr. Gazin spent a week after August 9 at the Los 
Angeles County Museum studying the Eocene collections recently 
transferred from the California Institute of Technology. Early in 
