Indies, but is, both faunally and geologically, related to South 

 America, of which it was undoubtedly once a part. Mr. 

 Chapman passed the greater part of his time at the Indian 

 Walk Rest-house, seven miles southwest of Princestown ; 

 and he also visited San Fernando, La Brea, Moruga, the 

 Caroni River, and Monos and Huevos Islands. He de- 

 scribed his experience on Huevos Island in the cave which 

 is inhabited by about two hundred Guacheros (Steatomis 

 caripensis.) [See "Bull. Am. Mus. Nat. Hist.," Vol. v., pp. 

 203-234, and Vol vi., pp. 1-86.] 



C. S. Allen, M. D., exhibited an egg of the Canada 

 Goose (Branta canadensis) of unusually large size, inside of 

 which was a smaller egg perfectly formed and which had 

 contained two yolks. The outer egg contained one. 



June 21, 1893. — The President in the chair. Seven mem- 

 bers and two visitors present. 



J. A. Allen, Ph. D., presented remarks upon the White- 

 footed Mice of North America, exhibiting specimens of 

 nearly every known form of the genus Sitomys (formerly 

 Hesperomys). Mr. Chapman spoke of the Florida forms — 

 Sitomys niveiventris and 5. gossypinus. 



Mr. F. M. Chapman read a paper entitled 4< Birds Ob- 

 served on a Voyage to Trinidad." In the course of the 

 paper, he described the migrations which take place in the 

 West Indian Islands and on the northern coast of South 

 America. He said that apparently the greater number of 

 North American birds reach Trinidad by way of the An- 

 tilles. On the return voyage many Petrels were seen, over 

 one hundred individuals having been observed on May 16 

 and 17. These birds parted company with the vessel, 

 when a cold wave set in, off the southern coast of Delaware. 

 Man's influence upon the distribution of birds was brought to 

 mind by the appearance of a Black Finch (Volatinia jaca- 

 rini splendens) upon the vessel when off Trinidad ; the bird 

 remained on board until Grenada was reached, when it flew 

 ashore. A Black-poll Warbler (Dendroica striata) was 

 seen near the vessel when two hundred and fifty miles from 

 the nearest land. 



