. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 106 Bulletin Museum of Comparative Zoology, Vol. 135, No. 2 EPURALS HYPURAL 6 HYPURAL 4 + 5 — HYPURAL 2 + 3. Figure 42. Caudal skeleton of Peprilus triacanthus, drawing of a cleored-and-stained preparation from a 36-mm specinnen. All elements identified in Figure 1. cally, all members of the nominal genera are very similar. The species differ but little from one an- other. There is some question as to whether or not certain populations are to be re- garded as full species or only as subspecies. The marked similarity b
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 106 Bulletin Museum of Comparative Zoology, Vol. 135, No. 2 EPURALS HYPURAL 6 HYPURAL 4 + 5 — HYPURAL 2 + 3. Figure 42. Caudal skeleton of Peprilus triacanthus, drawing of a cleored-and-stained preparation from a 36-mm specinnen. All elements identified in Figure 1. cally, all members of the nominal genera are very similar. The species differ but little from one an- other. There is some question as to whether or not certain populations are to be re- garded as full species or only as subspecies. The marked similarity between species, and therefore the doubt as to the rank to be accorded certain forms, is probably due to the fact that active speciation is occurring now in the genus. More variational studies and increased knowledge of the natural his- tory are needed to resolve these questions. The species in Peprilus are: Pcprilus parti (Linnaeus, 1758)=S/ro- mateus paru Linnaeus. West Indies to Uru- guay, type locality Jamaica. D III 38-44. A II 3,5-41. P 20-22. Vertebrae 13 + 17. This species is distinguished from the very closely related P. alcpidotus (Linnaeus, 1766) by the lower counts and narrower pectoral fin (Hildebrand, MS). Synonyms are: '^'Seserinus xcinthuriis Quoy and Gaimard, 1824, from Brazil; Rhombus crenulotus Cuvier and Valenciennes, 1833, from Cayenne; and Rliombus orbicularis Guichenot, 1866a, also from Cayenne. Pcprilus alcpidotus (Linnaeus, 1766) = Chaetodon alcpidotus Linnaeus. East coast of North America from Massachusetts to Florida and Gulf of Mexico, type locality Charleston, South Carolina. D III 43-49. A II 39-43. P 21. Vertebrae 13 + 17. This species is considered distinct from P. paru by Hildebrand (MS), although both are often lumped under this name. This is the "harvestfish" of the North American fish- eries literature. Stromateus longipinnis Mitchill, 1815, from New York Bay, is a synonym. Pcprilus triacanthus (Peck, 1804) = Stro- mateus triacanth
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