426 Bulletin American Museum of Natural History. [Vol. XXXV, 



ceeded northward to San Francisquito Bay, arriving at 2 P. M. This 

 proved to be one of the best localities visited during the cruise for marine 

 invertebrates, and a great variety of such forms was obtained. A consider- 

 able number of fishes was secured. At nearly all localities we obtained 

 an abundance of food fish for the crew. 



On the morning of the 10th the 'Albatross' went to Angel Guardia 

 Island, arriving at noon. This large island is said to be entirely lacking in 

 fresh water and, like nearly all other islands in the Gulf, is uninhabited. The 

 land forms were especially interesting; among the birds taken were burrow- 

 ing owl and great-horned owl. We obtained eighteen specimens of the large 

 black lizard (Sauromalus hispidus) and found rattlesnakes (Crotalus atrox) 

 abundant. Four of the black lizards exceeded two feet in length. The beach- 

 es were unsuitable for successful work with the seine, but a number of fishes 

 were obtained by other means, one of them being Mycteroperca vcnadorum, 

 an important food fish which reaches a weight of 150 pounds. About 60 of 

 these were taken, averaging 15 pounds each. Four large California jewfish 

 were caught, the largest weighing 70 pounds. Among the mammals pro- 

 cured here were a new woodrat (Neotoma insidaris), and a new mouse (Pero- 

 myscus guardia). Angel de la Guardia, near the western shore of the gulf, 

 is 40 miles long by about 10 miles wide and has a height of about 4000 feet. 



On the morning of the 11th, we proceeded to the south end of Tiburon 

 Island, arriving at 3 P. M. The general appearance of this island is not 

 different from that of other islands in the gulf, except in its greater height, 

 all the islands being essentially desert-like in character and most of them 

 entirely without fresh water. Tiburon is uninhabited by whites but there 

 are Seri Indians on the north and east sides. We saw nothing of the latter 

 and no signs of human occupation except a deserted camp of turtle hunters 

 on the beach. Lieutenant Stanley killed a buck weighing 121 pounds, not 

 including the viscera, while I killed a doe which was considerably smaller. 

 The small traps yielded several kangaroo rats. The burrows of these ani- 

 mals were to be seen everywhere in the level places, and were mostly con- 

 nected by well-beaten trails. 



Five new species of mammals were obtained: a coyote (Canis jamesi), 1 

 a jack-rabbit (Lepus alleni tiburone?isis) , a wood-rat (Neotoma albigula 

 sen), and two pocket mice (Perognathxis penicillatus seri and Perognathus 

 baileyi insularis). The mammals, birds, lizards and plants obtained here 

 were all valuable, as very little is known of the fauna and flora of this island. 

 One land tortoise was procured and the botanist found a new century plant 

 (Agave subsimplex) . Our explorations extended about five miles inland in 

 several directions, but we found no evidences of fresh water. The seine,. 



1 Named for Mr. Arthur Curtiss James of New York. 



