2V8 S. I. Smith — Amphipodus genera, 



E)-icthonius — (continued). 



Bate, Report British Assoc. Adv. Sci.. 1855, p. 59, 1856 {Erichthonius) ; Ann. 



Mag. Nat. Hist., IT, xix, U9 (17). 1857. 

 White, Popular Hist. British Crust., p. 19(S, 1857. 



Liljeborg, ffifversigt Vetenskaps-Akad. Forhandlingar, Stockholm, 1855, p. 131. 

 Costa, Amfipodi Napoli, Mem. Accad. Sci. Napoli, i, pp. 175, 227, 1856. 

 BruzeUus, Scandinav. Amphipoda Gammaridea (Vetenskaps-Akad. Handlingar, 

 Stockholm, iii), p. 17, 1859 {EricMonius). 

 Cerapodina M. -Edwards, Hist. nat. Crust, iii, p. 62, 1840 (abdita {—Cerapus abditus 

 Templeton) the only species). 

 Dana, Amer. Jour. Sci., II, viii, p. 139, 1849, and xiv, p. 309, 1852 ; U. S. Expl. 

 Expd., Crust., p. 832, 1853. 

 Podocerus Kroyer, Naturh. Tidsskrift, iv, p. 163, 1840 (in part). 

 Dercothoe Dana, Amer. Jour. Sci., IT, xiv, p. 313, 1852; U. S. Expl. Expd., Crust, 



p. 911, 1853. 

 PycUlus Dana, Amer. Jour. Sci., II, xiv, p. 313, 1852 ; U. S. Expl. Expd., Crust., p. 



911,1853. 

 Cerapus Bate, Catalogue Amphip. Crust. British Museum, p. 262, 1860 (in part). 

 Bate and Westwood, British Sessile-eyed Crust., i, p. 452, 1863. 

 Czerniavski, Materialia ad Zoographiam Ponticam comparatam, p. 97, 1868. 

 Boeck, Christiania Videnskabs-Selskabs Forhandlinger, 1870, p. 250 (170) ; 

 Scandinav. og arktiske Amphip., p. 611, 1876. 



The synonymy of M diffortnis, the type of the genus, is appar- 

 ently still in confusion, and as it is a common species upon the coast 

 of northern New England, I subjoin the following account of it : 



EricthoniuS difformis Milne-Edwards. 

 Eridhonius difformis M. -Edwards, Ann. Sci. nat., Paris, xx, p. 382, 1830; Hist 

 nat. Crust., iii, p. 60, pi. 29, figs. 12, 13, 1840. 

 Liljeborg, (Efversigt Vetenskaps-Akad. Forhandlingar, Stockholm, 1855, p. 129. 

 ? Costa, Amfipodi Napoli, Mem. Accad. Sci. Napoli, i, p. 228, 1856. 

 Bruzilius, Scandinav. Amphipoda Gammaridea (Vetenskaps-Akad. Handlingar, 



Stockholm, iii), p. 17, 1859 (Ejtcthonius). 

 Goes, (Efversigt Vetenskaps-Akad. Forhandlingar, Stockholm, 1865, p. 552 

 (E7-ictho7uus). 

 Podocerus Leachii Kroyer, Naturh. Tidsskrift, iv, p. 163, 1840 ("Femina hujus spe- 



ciei forma pedum secundi paris Podocerus est, mas vero Erichthonius"). 

 Cerapus rubricornis Stimpsou, Inverteb. Grand Manan, p. 46, pi. 3, fig. 33 (caudal 

 appendages), 1853. 

 Bate, Catalogue Amphip. Crust., British Museum, p. 265, pi. 45, fig. 4 (young 3 ), 



1862 (Bay of Fundy). 

 Packard, Memoirs Boston Soc. Nat. Hist., i, p. 297, 1867 {G. rubiformis). 

 Smith, Inverteb. Animals Vineyard Sound, Report U. S. Comm. Fish and Fisher- 

 ies, part i, p. 565 (271), pi. 4, fig. 18, 1874. 

 Smith and Harger, Trans. Conn. Acad., iii, pp. 5, 19, 1874. 

 Podocerus punctaUis Bate, Ann. Mag. Nat. Hist., IT, xix, p. 148 (17), 1857 ("P. 

 punctatus [ViAwavAs, MS. Brit. Mus.)"). 



