A kp:view of the oobioid fishes of japan, with DESCKHmONS OF TWENTY-ONE NEW SPECIES. By David Stark Jordan and John Otterbein Snyder, Of tJie Leland Stanford Junior University. Ill the present paper is oiven a descriptive catalo(^ue of the species of j(t)bies found in the waters of flapan. It is based primarily on the hirj^e collection made by the authors in Japan in the sunnuer of 1900, under the auspices of the Hopkins Biological Laboratory of Stanford University. Numerous additional specimens have been jjresented by the Imperial University of Tokyo through Dr. Kakichi Mitsukuri, and by the Imperial Museum of Japan through Dr. Chiyomatsu Ishi-kawa. The gobies collected by the U. S. Fish Commission steamer Alhdtross in 1900, the collections in the United States National Museum, and the collections of Professor Keinosuke Otaki in 1895 and 189() have also been considered, as well as the collections made by Mr. Pierre Louis Jouy in 1885. A series of typical specimens are in the U. S. National Museum and in the Imperial University of Tokyo. Duplicates have been presented to several other institutions. The accompanying drawings are the work of Mrs. Chloe Lesley Starks, artist of the Hopkins laboratory, and of Mr. A. H. Baldwin. MEASUREMENTS. The measurements given in the tables were made by means of dividers and a proportional scale. In some cases they will be of great value as an aid in discriminating between closely related species. It is V)elieved also that they will show, in an approximately definite way, some of the variations of certain characters useful in the determination of relationships. They are expressed in hundredths of the length of the l)ody, which is measured from the tip of the snout to the end of the last vertebra. The depth of the body is measured at its deepest part; depth of caudal peduncle at its narrowest place; length of caudal peduncle from ))ase of last anal ray to end of last vertebra; length of head from tip of snout to posterior edge of opercle; length of snout from its tip to anterior margin of orbit; width of interorbital space measured on Proceedings U. S. National Museum, Vol. XXIV— No. 1244. Proc. N. M. vol. xxiv— 01 8 33
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