848 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.xxi. 



Mr. Adrian Bollfus in his paper on "Les IdoteidiiR des Cotes de 

 France,''' has wrougly confounded iSynidotea Harger with /Stenosoma 

 Leach. Synidotea can by no means be considered a synonym of Steno- 

 soma, as anyone who is familiar with the two genera will undoubtedly 

 admit. It differs from Stenosoma in the consolidation of the epimera 

 with the segments. The epimera are firmly and i)erfectly united with 

 the segments, and the only trace or indication of a sei)aration is rep- 

 resented in the anterior segments by a slight and almost imperceptible 

 notch in the posterior margins, halfway between the lateral margin and 

 the median line of the body, and in the three posterior segments by a 

 very faint line. In Stenosoma all the epimera are very distinct from 

 the segments. 



45. SYNIDOTEA PALLIDA Benedict. 

 Synidotea pallida Benedict, Proc. Acad. Nat. Sci. Phila., 1897, pp. 396,397. 



Habitat. — Chirikof Island, Alaska. 



46. SYNIDOTEA EROSA Benedict. 

 Synidotea erosa Benedict, Proc. Acad. Nat. Sci. Phila., 1897, pp. 397-399. 

 Habitat. — Sannakh Island, Alaska. 



47. SYNIDOTEA NEBULOSA Benedict. 



Synidotea nehulosa Benedict, Proc. Acad. Nat. Sci. Phila., 1897, pp. 394,39.5. 



Habitat. — Uualaska; Kyska Harbor; Semidi Islands; Unimak 

 Island; Bering Sea; Kamchatka. 



48. SYNIDOTEA ANGULATA Benedict. 



Synidotea ant/iihita Benedict, Proc Acad. Nat. Sci. Phila., 1897, pp. 39.5,396. 



Habitat. — Oft" Cape Johnson, Washington; oft' Destruction Island, 

 Washington; oft' Cape Flattery, Washington. 



49.' SYNIDOTEA CONSOLIDATA (Stimpson). 



Idotca coniioUdala Htuipson, Proc. Cal. Acad. Sci., I, 18.56, p. 89; B08. .Journ. Nat. 



Hist., \I, 1857, p. 503. 

 JSdotia hicnspida Mieks, .Journ. Linn. See. London, XVI, 1883, p. 6&. 

 Synidotea consolidata Benedict, Proc. Acad. Nat. Sci. Phila., 1897, p. 393. 



Habitat. — Pacific Grove, California. 



50. SYNIDOTEA BICUSPIDA (Owen). 



Idoica biciiapida Owen, Crustacea of the Blossom, 1839, p. 92, pi. xxvii, fig. 6. 



Idotea piilchra Lockington, Proc. Cal. Acad. Sci., VII, 1877, p. 44. 



Idotea bivuspida MiEiis, Journ. Liun. Soc. London, XVI, 1883, \>. 06. 



Synidotea bicuspida Sai:s, Crust. Norwegian North Atlantic Expedition, 1885, 



p. 116, pi. X, figs. 24-26.— Benedict, Proc. Acad. Nat. Sci. Phila., 1897, pp. 



391, 392. 



Habitat. — West coast of Alaska and Bering Sea. 



' Feuille des Jeunes Natural istes, 1895. 



