270 CALIFORNIA ACADEMY OF SCIENCES. 



gation. Through the kindness of Mr. Luis Huller I was 

 enabled at the end of the same year to make a second visit, 

 landing on the island on December 16, 1885. My expecta- 

 tion was to stay about six weeks, but as it eventuated, it 

 was one hundred and twelve days before an opportunity 

 presented itself for me to leave the island. During these 

 three months and a half I had ample time to 

 most thoroughly prospect the island and to make a careful 

 study, not only of the birds themselves but of their habits, 

 number and distribution. 



Guadalupe being almost unknown and charts quite unat- 

 tainable, a few words in the way of description may serve to 

 render more lucid the remarks which follow. 



Guadalupe Island is situated about two hundred and 

 twenty miles to the southward and westward of San Diego, 

 the northern extremity lying in about 29^ 10' N., 118^ 18' 

 W. Extending about fifteen miles in length, with a max- 

 imum width of five miles, it is said to reach at its highest 

 point an altitude of 4,523 feet. It is of volcanic origin, as is 

 is evidenced by the loose, burnt rocks, and broken lava 

 which cover the entire island. Rocks varying in size from 

 the smallest pebble to that of a cocoa nut are thickly strewn 

 about on every hand, while in places, huge boulders and 

 ledges crop out. An unbroken ridge rising to its greatest 

 height in the central portion extends the entire length of the 

 island from north to south, forming a " hog's back." On 

 the western side of this range, the land slopes rapidly 

 towards the ocean, ending in many places in high perpen- 

 dicular cliffs. 



Towards the south the land is somewhat lower, sloping 

 more gradually and ending less abruptly. It is noticeable 

 that the southern part of the island, which is the lowest, is 

 very rocky and barren, no trees growing below the central 

 mesa. Whatever vegetation exists there, consists of stunted 

 alfileria and scattered sagebrush. The westei'n side is 

 broken by two great canons separated by a barren hill of 



