12 THE AMERICAN CHARACIDAE. 



hollow logs — Amazon, one mile above Santarem. //, 19. Igarape de Jrura entering Rio 

 Tapajos, two miles above Santarem. 12. Igarape de Maica, four miles below Santarem. 

 14- Tapajos in front of Santarem. 15. Island in Amazon, three miles above Santarem. 

 20. Rio Tapajos at Santarem. 21. Amazon. Half-way between Santarem and Para. 

 24. Para market. 27. From Gran Para between Belem and Salinas. 29. Braganca, 

 Rio Caete. 16 kilometers from ocean, 162 from Para. January 1, 1910. Salt water, mouth 

 of Rio Caete. 10. Alcobaca, Tocantins. Below first falls. 15-22. Para market. 



The Guiana Expedition. 



The joint Expedition of the Indiana University and the Carnegie Museum, 

 led by myself, collected in British Guiana, between September 9 and December 

 1, 1908. A detailed account of the results of this Expedition is published as 

 volume 6 of the Memoirs of the Carnegie Museum. The localities, enumer- 

 ated from east to west are : — Maduni Stop-Off, Lama Stop-Off, Cane Grove 

 Corner, the Georgetown Trenches, Morawhanna, Mora Passage, and Koriabo 

 and Issorora Rubber Plantations, all in low tidal land; Christianburg, Wismar, 

 and Malali, the latter about one hundred miles from its mouth, on the Demerara 

 River and Bartica, Rockstone, Gluck Island, Crab Falls, Konawaruk, Warra- 

 puta Cataract, and Packeoo Fall, all on the middle course of the Essequibo 

 River. A special effort was made to get a complete series from the Potaro 

 River both above and below the seven hundred and forty-one foot Kaieteur 

 Fall. Collections were made between October 6 and November 4, 1908, at 

 Aruataima, Holmia, and Savannah Landing above the Kaieteur and at Shrimp 

 Creek, Tukeit, Waratuk, Amatuk, Erukin, Kangaruma, Potaro Landing, and 

 Tumatumari below the Kaieteur. Mr. William Grant my Indian guide sent 

 in additional collections from the Rupununi and the Ireng Rivers. The first 

 series of specimens of this Expedition is in the Carnegie Museum, the second 

 series in Indiana University. Other series are in the Museum of Comparative 

 Zoology, the U. S. National Museum, the Field Museum, Stanford University, 

 the British Museum, the Museums at Amsterdam, Berlin, Vienna, and George- 

 town, British Guiana. 



The Gimbel Expedition. 



Through the generosity of Mr. Jake Gimbel of Vincennes, Indiana, Dr. 

 Max Mapes Ellis and Dr. William M. Tucker were enabled to go to British 

 Guiana primarily to gather material for a monograph of the Gymnotidae. 1 



1 The gymnotid eels of Tropical America. Memoirs Carnegie museum, 1913, 6, p. 109-195, pi. 

 15-23. 



