208 Bulletin, Vanderhilt Marine Museum, Vol. Ill 



mm. long, 3 mm. wide proximally, 2.4 mm. wide distal ly, convex, with 



the posterior margin truncated. The uropoda form valve-like doors, 



covering the pleopoda. 



The inner antennae are short, consisting of stocky articles, extend- 

 ing only to about midway the third article of the second antennae. 

 The outer antennae consist of five peduncular articles and a flagel- 



lum of eight articles, each furnished Math small setae. 

 The external maxillipeds have a palp of four articles. 

 The legs are slender, subsimilar ; each has the carpus and propodus 



moderately thick and armed with numerous spinose bristles on the 



ventral face ; the dactyl is very curved, acuminate, with a horny tip, 



appearing almost prehensile. 



The pleopoda are elongate-oval and heavily ciliated on the margins. 



Synonymy. — Idotea metallica Bosc, Hist. Nat. Crust., vol. 2, p. 179, 

 pi. XV, fig. 6, 1802.— Latreille, Hist. Nat. Crust, et Insectes, 

 vol. 6, p. 373, 1803.— MiERS, Journ. Linn. Soc. London, XVI, 1883, 

 pp. 35-38 (with full synonymy). — Hansen, Videnskabelige Med- 

 delelser fra den Naturhistoriske Forening i Kjobenhavn, 1887- 

 1888, p. 188. — DoLLFUs, Feuille des jeunes Naturalistes, 1895, p. 

 8, fig. 24.— Richardson, Amer. Nat., vol. 34, p. 226, 1900 ; Proc. 

 U. S. Nat. Mus., vol. 23, 1901, p. 541.— Norman, Ann. Mag. Nat. 

 Hist. (7), vol. 14, 1904, p. 443. 



Idotea peloponesciaca Roux, Crust, de la Mediterranee, 1828, pi. 30, 

 figs. 10-12. 



Idotea atrata Costa, Fauna del R. Napoli, Crust., 1838, pi. XI, fig. 3. 



Idotea rugosa Milne Edwards, Hist. Nat. Crust., vol. 3, 1840, p. 131. 



Idotea compacta White, List Crust. Brit. Mus., 1847, p. 95. 



Idotea algirica Lucas, Anim. Arctic in Explor. Sci. Algerie, vol. I, 

 Crust., 1849, p. 61, pi. 6, fig. 2. 



Idotea rohusta Kroyer, Naturh. Tidsskr. (2), vol. 2, p. 108, 1846-49; 

 Voy. en Scand., Crust., 1849, pi. 26, fig. 3. — Reinhardt, Natur- 

 historisk Bidrag til en Beskrivelse af Gronland, 1857, p. 35. — 

 Stimpson, Proc. Acad. Nat. Sci. Phila., 1863, p. 133. — Verrill, 

 Amer. Journ. Sci., vol. 2, 1871, p. 360. — Hager, in Verrill, Rept. 

 U. S. Comm. Fish and Fisheries, part 1, 1873, p. 439, p. 569, pi. 5, 

 fig. 24.— Harger, Proc. U. S. Nat. Mus., vol. 2, p. 160, 1879 ; Re- 

 port U. S. Comm. Fish and Fisheries, part 6, 1880, p. 349, pi. 6, 

 figs. 30-32. 



Idothea metallica Richardson, Bull. 54, U. S. Nat. Mus., p. 362, 1905. 



