[575] INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC. 281 
ARGULUS MEGALOPS Smith, sp. nov. (p. 452.) 
Carapax subelliptical, longer than broad; the antero-lateral margin 
with a deep sinus; the posterior lobes of the carapax, each side of the 
shallow and narrow sinus, 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 ofthelength. Natatory legs very 
long, all projecting beyond the carapax. Squamiform appendages upon 
the bases of the prehensile legs, with a pappilose 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%; 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 ALOSA Gould.  (p. 459.) 
Invertebrata of Massachusetts, p. 340, 1841. 
Parasitic upon the alewife in Massachusetts Bay, according to Gould. 
CALIGUS CURTUS Miiller. (p. 459.) 
Entomostraca, p. 130, Pl. 21, figs. 1,2, 1785 ; Kroyer, Nat. Tidsskrift, vol. i, is 619; 
PL. 6, fig. 2, 1837. Caligus Miilleri Leach, Encyel. Brit., Suppl., vol. i, p. 405, 
Pl. 20, figs. IS) eee (teste Baird et al.;) Baird, British Entomestraca, = 271, 
Pl. 32, figs. 4, Caligus Americanus Pickering and Dana, Amer. Jour. Sci., 
vol. XXXIV, p. 295, 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 RAPAX Edwards. (p. 457.) 
Hist. nat. des Crust., tome iii, p. 453, Pl. 38, fig. 9-12, 1840; Baird, op. cit., p. 270 
pl. 32, figs. 2,3; Steenstrup and Liitken, Bidrag til Kundskab om det aahne 
Havs Pay ineiecobac og Lerneer, p. 359, Pl. 2, fig. 4, 1861. 
Vineyard Sound, on the sting ray, (Trygon centroura,) and small speci- 
mens, both male and female, taken at the surface at Wood’s Hole, Sep- 
tember 5, 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 along tail, and somewhat like the LZ. gracilis, (Van 
Benaden sp.,) was found upon the sting ray (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, (Chanopsetta ocel- 
laris.) 
