The annals and magazine of natural history : zoology, botany, and geology . ela comuta, Richardson, Proc. Am. Phil. Soc. xxsvii. 1898,p. 12, figs. 1, 2. hab. Off Shumagin Bank, Alaska. 11. Rocinela helliceps (Stimpson). JEya helliceps, Stimpson, Proc. Acad. Nat. Sci. Philad. xvi. 1864, p. loo.^ga alaskensis, Lockington, Proc. Cal. Acad. Sci. vii. 1877, pt. i. p. alancensis, Richardson, Proc. Am. Pbil. Soc. xxxni. 1898, p. 11. Hah. Cortes Bank, Calitornia, to Alaska and Bering Sea. 12. Rocinela laticiuda^ Hansen. Rocitiela laticauda, Hansen. Bull. Mus. Comp. Zool. xxxi. 1897, uo. 5,
The annals and magazine of natural history : zoology, botany, and geology . ela comuta, Richardson, Proc. Am. Phil. Soc. xxsvii. 1898,p. 12, figs. 1, 2. hab. Off Shumagin Bank, Alaska. 11. Rocinela helliceps (Stimpson). JEya helliceps, Stimpson, Proc. Acad. Nat. Sci. Philad. xvi. 1864, p. loo.^ga alaskensis, Lockington, Proc. Cal. Acad. Sci. vii. 1877, pt. i. p. alancensis, Richardson, Proc. Am. Pbil. Soc. xxxni. 1898, p. 11. Hah. Cortes Bank, Calitornia, to Alaska and Bering Sea. 12. Rocinela laticiuda^ Hansen. Rocitiela laticauda, Hansen. Bull. Mus. Comp. Zool. xxxi. 1897, uo. 5,pp. 108, 109; Richardson, Proc. Am. Phil, Soc. xxxvii. 1898,pp. 14, 15, figs. 5, 6. Hab. OfFAcapulco; near Tres Marias Islands ; off ^lazat-lan; off San Luis Obispo Bay, California ; off Esteros Baj,California; Paget Sound, ; Unimak Island,Alaska. 170 Miss H. Richardson on the Tsopods of the 13. Rocinela tuberculosa^ Richardson. Rocinela tuberculosa, Richardson, Proc. Am. Phil. Soc. xxxvii. 1898,p. 16, fig. 10. Hah. Southern part of Gulf of California. Fig. Rocinela belliceps (Stimpson). x 2§. 14. Rocinela aries^ Schiodte & Meinert. Rocinela aries, Schiodte & Meinert, Naturhistorisk Tidsskrift, , pp. 401-403, pi. xiii. figs. 7, 8. Hab. Mazatlan ; Lower California ; Panama Bay. Family VI. CymothoidaB. Analytical Key to the Genera q/ Cymothoidae. Head deeply immersed or set in the first thoracic seg-ment, whose antero-lateral angles project forward. h. Abdomeu deeply immersed. rirst pair of anteunse more often dilated, rarelycompressed. First four or five segments of bodylong, subequal in length, except the first, whichis a little longer; last two or three segmentsabruptly shorter, very often decreasing graduallyin length. Terminal segment of abdomen sub-triangular or semicircular, often bilobed. Bodyoblong 8. Meinertia. b. Abdomen scarcely immersed. First pair of antennae very much compressed. Seg-ments of thorax either equal in length or thefirst segm
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