. Alaska ... Natural history; Scientific expeditions. DECAPODS 117 Bailey Harbor, Alaska Peninsula (Albatross). Coal Harbor, Unga Island, Shumagins, 3 fathoms (W. H. Dall). Also occurs along the eastern coast of North America, from East Florida (Say) northward. It becomes necessary to separate the common Cmngofi of the Atlantic and Alaskan coasts of North America from the form found in Europe, These two species have usually been combined under the name Crangon crangon (Linnaeus) or C. vulgaris Fabricius. In Crangon crangon (of Europe) the antennal scale is wider at its distal end, and that mar
. Alaska ... Natural history; Scientific expeditions. DECAPODS 117 Bailey Harbor, Alaska Peninsula (Albatross). Coal Harbor, Unga Island, Shumagins, 3 fathoms (W. H. Dall). Also occurs along the eastern coast of North America, from East Florida (Say) northward. It becomes necessary to separate the common Cmngofi of the Atlantic and Alaskan coasts of North America from the form found in Europe, These two species have usually been combined under the name Crangon crangon (Linnaeus) or C. vulgaris Fabricius. In Crangon crangon (of Europe) the antennal scale is wider at its distal end, and that margin, although convex, trends forward toward the inner angle. The spine is shorter than the distal width of the blade. In Crangon septeinspitiosa Say (of America) the scale is narrower at its distal end, and that margin, although convex, does not trend forward toward the inner angle, but rather slopes backward. The spine is as long as, or longer than, the distal width of the blade. CRANGON ALBA Holmes. Crangon alba Holmes, Occas. Papers Calif. Acad. Sci,, vii, 174, 1900. Monterey, dredged. A short stout species. Carapace about two fifths as long as abdomen. Rostrum broader than in C. nigricauda. The first segment of the anten- nule exceeds the process on the outer side of its base; inner flagellum exceeding the antennal scale; outer flagellum shorter than the scale. Blade of scale with very oblique inner margin, the tip scarcely wider than the adjacent portion of the spine; spine extending considerably beyond the blade. Scale about three fourths the length of carapace. ,F'^- s^- ^ Crazigon ° •' alba. 9. San Diego. MaxiUipeds reaching the end of the «• Dorsal view of orbjtai Fig. 57. Crangon ^^ . \ ° region (X 4)- -i^. Acicle alba. Chela of ? blade, thc autcpenult segment much ex- - " panded. The first pair of feet reach to the middle of the last joint of the maxillipeds; the hand is very stout, wider than in C. nigricauda, the length being two and one fourth times th
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