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THE AMERICAN NATURALIST [Vol. XLII 



In the same Proceedings, Volume 7, 1908, Dr. Meek gives an 

 interesting account of the "Zoology of the Lakes of Guatemala." 



In Science, Volume 27, 1908, Professor J. 0. Snyder discusses 

 the region of the fauna of the Russian River in California, show- 

 ing that these fishes were derived from the Sacramento River 

 by a process of stream-robbing, by which through erosion the 

 Russian River Valley incorporated small streams from tribu- 

 taries of Clear Lake, which drains into the Sacramento. 



In the Bulletin of Agriculture of the Dutch East Indies, 

 Volume 8, 1907, Dr. P. N. van Kampen describes two of the 

 mackerel found on the coast of Java. These descriptions are 

 useful, but the synonmy given perhaps needs verification. 

 These mackerel apparently belong to the genus Rastrelliger, 

 distinguished from Scomber by the very great number of gill- 

 rakers, recently described by Jordan and Starks. 



In the Annuaire of the Museum of Sciences of St. Petersburg, 

 Volume 12, 1907, Dr. L. Berg describes the grayling of Siberia, 

 with a comparative account of their relation to other salmoninae. 

 The species known as Brachymystax obtusirostris from Siberia 

 is made the type of a new genus, Salmothymus, differing from 

 Brachymystax in having the vomer prolonged, with two rows 

 of teeth, as in Salmo. The subgenus Thymalloides is proposed 

 for Thymallus arcticus, this group species including also all the 

 American grayling, the name Thymallus being restricted to 

 T. thymallus, the grayling of Europe, which does not occur to 

 the eastward of the Ural Mountains. Three species of Hucho 

 are recognized, H. hucho in the Danube, H. taimen in Siberia 

 and E. perryi in Japan. The genus Phylogephyra is recognized 

 for Thymallus brevirostris, or altaica, of Siberia. This is dis- 

 tinguished by the larger mouth and larger and more numerous 

 teeth, which are present on the head of the vomer and on the 

 tongue. 



Dr. Theodor von Kawraysky has published an elaborate ac- 

 count in Russian and in German of the sturgeons of the Cau- 

 casus, with lists of other fishes taken in the same region. 



In the Memoirs of the Museum of Comparative Zoology of 

 Harvard Dr. Charles H. Gilbert gives an account of the lantern 

 fishes collected by the Albatross in the South Seas. The species 

 obtained are carefully described, and their synonymy very fully 

 worked out. Several new species are contained in the collection. 



