384 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 



iEga psora Kroyer (Linn<5). 



Oniscus psora "Liun6, Fauna suecica, ed. ii, 1761"; Syst. Nat., ed. xii, torn, i, 

 p. 10(50, 17G7. 



"Pennant, Brit. Zool., vol. iv, pi. 18, fig. 1, 1777 (certe)" (B. &W.). 



O. Fabricius, Fanna Grcenlandica, p. 249, 1780. 



Molir, Islandisk Naturliistorie, p. 110, 1786. 

 JEga emarginata Leach, Trans. Linn. Soc., vol. xi, p. 370, 1815; Diet. Sci. nat., 

 tome xii, i>. 349, 1818. 



Samouelle, Eut. Comp., p. 109, 1819. 



Desmarest, Consid. Crust., p. 305, pi. 47, figs. 4, 5, 1825. 



Griffith and Pidgeon, Nat. Hist. Crust., p. 218, pi. viii., fig. 3, 1833. 



Edwards, Hist. nat. des Crust., tome iii, p. 240, 1840; Regne Anim., Crust., 

 pi. iv, fig. 4, and j)l. Ixvii, fig. 1, 1849. 



Gould, TRep.Geol.Mass., p. 549, 1835; Invert. Mass., p. 338, 1841. 



Gosse., Man. Mar. Zool., vol. i, p. 134, 1854. 

 ^ga (Oniscus 2>sora) Kroyer, Gronlands Amfipoder, p. 318, 1838. 

 ^ga psora Lilljeborg, Ofvers, Vet.-Aead. Forh., 1850, p. 84, and 1851, p. 24. 



Liitken, Vidensk. Meddel., 1858, pp.65, 179,1859; ibid., 1860, p. 181(7) 

 1861 ; Crustacea of Greenland, p. 150, 1875. 



Schiodte, Ann. Mag. Nat. Hist., IV, vol. i, p. 12, 1868. 



Bate & Westwood, Brit. Sess. Crust., vol. ii, p. 283, figure, 1868. 



M. Sars, Chr. Vid. Selsk. Forh., 1868, p. 261, 1869. 



G. O. Sars, Hard. Fauna, Crust., p. 275 [32], 1872. 



Verrill, Am. Jour. Sci., Ill, vol. v, j*. 16, 1873. 



Smith and Harger, Trans. Conn. Acad., vol. iii, p. 22, 1874. 



Whiteaves, Further Deep-Sea Dredging, Gulf St. Lawrence, p. 15, "1874." 



Metzger, Nordseefahrt der Pomm., p. 285, 1875. 



Meinert, Crust. Isop. Amph. Dec. Danise, p. 89, "1877." 



Miers, Ann. Mag. Nat. Hist., IV, vol. xix, p. 134, 1877. 



Harger, Proc. U. S. Nat. Mus., 1879, vol. ii, p. 161, 1879. 

 ^ga entailUe Latreille, Rfegne Anim., tome iv, p. 134, 1829. 



Plate X, Fig. 64. 



The present species is the largest Isopod, and indeed the largest 

 Tetradecapod known on the IS^ew England coast, reaching a length of 

 nearly or quite two inches and a breadth of one inch, and has even at- 

 tained to the dignity of a popular name, "salve-hug", by which it is 

 known among fishermen. It may be further distinguished by its large 

 approximate eyes, covering a large proportion of the upper surface of 

 the head, and by the possession of ancoral legs in three pairs only, the 

 last four pairs of legs being fitted for walking. 



The body is oval, broadest at the fourth and fifth thoracic segments, 

 where the breadth is about half the length. The dorsal surface is 

 moderately convex and smooth except for minute and rather scat- 

 tered puuctations, which occur also on the legs, especially on the basal 

 segments, on the antenuulfe, the uropods, and even the pleopods. 

 The head is transverse and sub-triangular, salient in front between 

 the bases of the antennulse. Much of the upper surface of the head is 

 covered by the large oval or somewhat reniform eyes, which do not quite 

 meet on the median line. The antennulte when bent backward nearly 

 or quite attain the anterior margin of the first thoracic segment, and 



