. Annals of the Carnegie Museum. Carnegie Museum; Carnegie Museum of Natural History; Natural history. The Fresh Water Fishes of the Island of Formosa. 265 variety of Augiiilla japonica, tliough minor differences exist between these two forms, as shown in the following table of relative proportions: Formosan ;Japonica. Eel. Total length Distance from gill-opening to the origin of dorsal. Length of head Distance from gill-opening to vent Distance from tip of snout to origin of dorsal 3i-ii Distance between origins of dorsal and anal
. Annals of the Carnegie Museum. Carnegie Museum; Carnegie Museum of Natural History; Natural history. The Fresh Water Fishes of the Island of Formosa. 265 variety of Augiiilla japonica, tliough minor differences exist between these two forms, as shown in the following table of relative proportions: Formosan ;Japonica. Eel. Total length Distance from gill-opening to the origin of dorsal. Length of head Distance from gill-opening to vent Distance from tip of snout to origin of dorsal 3i-ii Distance between origins of dorsal and anal fins. . Length of pectoral 4-0i 4-77 Length of upper jaw 3-24 3-20 Length of snout Diameter of eye Interorbital space Height of body in front of anus 521 Ratio of pre-anal and post-anal parts i :i-53 i' i-47 Number of vertebras iiS-65 ii5-57 Moreover, he has regarded Anguilla remifera from Hokoto which was described by Jordan & Evermann {Proc. U. S. Nat. Miis., XXV, 1903, p. 325) as being also a variety of A. japonica, because the dis- tinctive characters of that species, that is, longer and rather pointed pectoral fins ( in head) and the distance from front of dorsal to front of anal slightly more than length of head, are the points which are to be seen in extreme variations among examples of A. japonica {Joiirn. Coll. Agriciil., IV, 1914, p- 426). Four specimens of an eel in the Stanford collections (No. 21181; Takao, Formosa) which had been described by Jordan and Richardson under the name Anguilla sinensis were examined and compared with my specimens of the common Formosan eel. It appears that in the former the distance from gill-opening to origin of dorsal, distance from gill-opening to vent, distance from tip of snout to origin of dorsal, diameter of eye, and height of body in front of anus (average length) are somewhat greater, while the length of head, distance between origins of dorsal and anal, length of pectoral,
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