126 



FISHERY BULLETIN OF THE FISH AND WILDLIFE SERVICE 



the dorsal body pigmentation extends posteriorly 

 from the operculum to the end of the second 

 dorsal. In the region of the second dorsal these 

 spots form a faint line a half millimeter from the 

 dorsal margin of the body. Above this line, 

 along the insertion of the fin itself, is the horizontal 

 bar of dark pigment characteristic of smaller speci- 

 mens. By 17.5 mm., the lateral pigmentation 

 has extended as far back along the Ime of the 

 vertebral column as the posterior end of the second 

 dorsal and anal fins. Coloration along the anal 

 insertion is stUl restricted to the few patches 

 characteristic of the smallest E. lineatus. The 

 posterior half of the orbit is dark. Coloration 

 of snout, jaws, and operculum is more dense. 

 At 22 nam., coloration fii-st appears over the 



terminal segments of the vertebral colmnn and 

 on the extreme base of the median caudal rays. 

 The dorsal half of the body is dark as far back as 

 the caudal peduncle. 



Preopercular spines are longer and slenderer 

 than those of A'^. macropterus. The angle of the 

 preoperculum bears the three largest spines. 

 Above these is a pair of small spines; anterior to 

 them are three others. With increasuig length 

 of fish, all become overgTO^vn to a certain extent. 

 At 18 mm., the most dorsal and anterior spines 

 are no longer visible without the use of special 

 techniques. The remainder ai-e visible, although 

 less distinct, m the largest E. lineatus in the 

 collections. 



Figure 5. — Euihynnus lineatus, 22 millimeters long. 



LITERATURE CITED 



Bleeker, Pieter. 



1854. Fauna ichthyologicae japonicae species novae. 

 Natuurkundig Tijdschrift voor Nederlandsch-Indie 

 uitgegeven door de Naturkundige Vereenigining in 

 Netherlandsch-Indie, vol. 6, pp. 395-426. 

 1854-57. Nieuwe nalezingen op de ichthyologie van 

 Japan. Verhandelingen van het Bataviaasch 

 Genootschap van Kunsten en Wetenschap, vol. 

 26, pp. 1-132, 8 pis. 

 EcKLEs, Howard H. 



1949. Observations on juvenile skipjack (Katsu- 

 wonus pelamis) from Hawaiian waters and sierra 

 mackerel {Scomberomorus sierra) from the Eastern 

 Pacific. U. S. Fish and Wildlife Service, Fish. 

 Bull., No. 48, vol. 51, pp. 245-250. 

 Ehrenbaum, E. 



1924. Scombriformes. Rept. Danish Oceanog. Exped. 

 1908-1910 to the Mediterranean and Adjacent 

 Seas, vol. 2 (Biology), No. 8, A. 11, pp. 1-42. 

 HoLLisTER, Gloria. 



1934. Clearing and dyeing fish for bone study. 

 Zoologica (N. Y.), vol. 12, No. 10, pp. 89-101. 



KiSHlNOUYE, KaMAKICHI. 



1919. The larval and juvenile stages of the Plecostei. 

 Suisan Gakkai Ho, vol. 3, no. 2. (U. S. Fish and 

 Wildlife Service, Pacific Oceanic Fishery Investi- 

 gations, Translation No. 20 by W. G. Van Campen; 

 hectographed.) 



1923. Contributions to the comparative study of the 

 so-called scombroid fishes. Jour. Coll. Agric, 

 Tokyo Imp. Univ., vol. 8, No. 3, pp. 293-475, 22 pis. 



1926. An outline of the studies of the Plecostei 

 (tuna and skipjack) in 1925. Suisan Gakkai Ho, 

 vol. 4, no. 3, 1 pi. (U. S. Fi.sh and Wildlife Service' 

 Pacific Oceanic Fishery Investigations, Transla- 

 tion No. 18 by W. G. Van Campen; hectographed.) 



LDtken, Ch. Frederik. 



1880. Spolia Atlantica. Bidrag til Kundskab om 

 Formforandringer hos Fiske under deres Vaext og 

 Udvikling, saerlight hos nogle af Atlanterhavets 

 H0js0fiske. Vidensk. Selsk.Skr.,5. Raekke, natur- 

 videnskabelig og mathemetisk Afd., vol. 12, No. 6, 

 pp. 413-613. 



