INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC. 575 



Argulus megalops Smith, sp. nov. (p. 452.) 



Carapax subelliptical, longer thaa broad; the antero-lateral margin 

 with a deep sinus; the posterior lobes of the carapax, each side of the 

 shallow and narrow sinns, broady rounded. Eyes very large, their 

 diameter a tenth as great as the breadth' of the carapax. Body pro- 

 jecting much beyond the posterior margin of the carapax. Tail some- 

 what ovate, about two-thirds as broad as long, the sinus only a small 

 notch, extending not more than a tenth of the length. Natatory legs very 

 long, all projecting beyond the carapax. Sqnamiform appendages upon 

 the bases of the prehensile legs, with apappilose area upon the expanded 

 portion, and the posterior margin armed with three rather slender 

 teeth, separated by broad spaces; the terminal segment of the leg 

 armed with two small hooks. 



Color of alcoholic specimens, yellowish white. 



Length, 2.2 mm ; length of carapax, 1.3; breadth of carapax, 1.0 ; length 

 of tail, 0.7; breadth of tail, 0.47. 



Vineyard Sound, taken at the surface, July 8. 



Argulus A.LOS.3G Gould, (p. 459.) 



Invertebrata of Massachusetts, p. 340, 1841. 

 Parasitic upon the alewife in Massachusetts Bay, according to Gould. 



Caligus curtus Miiller. (p. 459.) 



Eutomostracajp. 130, PL 21, figs. 1,2, 1785 ; Kroyer,Nat. Tidsskrift, vol. i, p. G19» 

 PI. 6, fig. 2, 1837. Caligus Miilleri Leach, Encycl. Brit., Snppl., vol. i, p. 405, 

 PL 20, tigs. 1-8, 181G, (teste Baird et al. ;) Baird, British Eutomostraca, p. 271, 

 PL 32, tigs. 4, 5. Caligus Ame'ricanus Pickering and Dana, Amer. Jour. Sci., 

 vol. xxxiv, p. 225, PL 3-5, 1838 ; Dana, U.'S. Expl. Expd., Crust., PL 93. 

 Abundant upon the cod-fish of our coast and of Europe. It is prob- 

 ably the Caligus piscinus of Gould and other American writers. 



Caligus rap ax Edwards, (p. 457.) 



Hist. nat. des Crust., tome iii, p. 453, PL 38, fig. 9-12, 1840 ; Baird, op. cit., p. 270, 

 pi. 32, figs. 2, 3 ; Steenstrup and Liitken, Bidrag til Kundskab om d,et aabne 

 Havs Snyltekrebse og Lernaeer, p. 359, PL 2, fig. 4, 1861. 

 Vineyard Sound, on the stingray, (Trygon centroura,) and small speci- 

 mens, both male and female, taken at the surface at Wood's Hole, Sep- 

 tember 3, in the evening. These specimens from the surface, according 

 to Professor Verrill's notes, were light flesh color, thickly speckled with 

 minute brown spots, the eyes bright red. 



Lepeophtheirus, species, (p. 459.) 



A species with a long tail, and somewhat like the L. gracilis, (Van 

 Benaden sp.,) was found upon the stingray (Trygon centroura) taken in 

 Vineyard Sound. 



Lepeophtheirus, species, (p. 459.) 



A species' with a very short tail, and approaching Heller's genus Anu- 

 retes. South shore of Long Island, upon a flounder j (Chainopsetta ocu- 

 laris. ) 



