INVERTEBRATE ANIMALS OF VINEYARD SOUND, ETC. 5G9 



ordinaiy high-water mark, in company witli several species of Staphyli- 

 nida; and will very likely be found on Long fssland and the southern coast 

 of Xew England. 



Philoscia vittata Say. 



.Tmir. Aoatl. Nat. Sci., riiilacU'lpliia, vol. i, p. 429, 1818. 

 Under rubbish below high-water mark, Couuecticut and New Jersey. 



Sph^roma quadridentata Say. Plate V, fig. 21. (p. 31,").) 



Jouv. Acad. Nat. Sci. riiiladelpliia, vol. i, p. 400, 1818. 



Massachusetts to Florida. 

 IDOTEA c^CA Say. Plate V, fig. 22. (p. 340.) 



Loc. cit., p. 424, 1818. Gould, Iiivertebrata of Massachusetts, p. 3:?7, 1841. 



Massachusetts to Florida. 

 Idotea Tuftsii Stimpson. (p. 340.) 



Marine. Iiivertebrata of Grand Mauan, p. 39, 185.3. 



Bay of Fuudy and oft' New Loudon, Couuecticut. 

 Idotea irrorata Edwards. Plate Y, fig. 23. (p, 31G.) 



Hist. uat. des Crust., vol. iii, p. 132, 1840. Steuusoma irrorata Say, loc. cit., p. 423, 

 1818; Gould, Invertobrata of Massachusetts, p. 338, 1841. 



Bay of Fuudy to Great Egg Harbor, IS'ew Jersey. 

 Idotea robusta Kroyer. Plate V, fig. 24. (p. 439.) 



•Naturhist. Tidssk., 2d R., Bind ii, p. 108, 1846 ; Stimpson, Proceedings Acad. 

 Nat. Sci., Philadelphia, 18G2, p. 133. 



South shore of Long Island to the Arctic Ocean. A pelagic species. 



Idotea phosphorea Harger, sp. nov. (p. 3IG.) 



Eesembliug I. irrorata in size and shape, but easily distinguished 

 from that species by the pointed abdomen. 



Antenn;ie leSiS than half the length of the body, antenuula^ attaining 

 the end of the third segment of the antenna?. Front slightly excavated 

 with the lateral angles salient. Head about twice as broad as long, 

 turgid, and usually with a ]»air of tubercles on the vertex. Eyes placed 

 a little before the middle of the lateral margin, hemispherical, black. 

 First segment of thorax produced laterally around the back i>art of the 

 head nearly to the eyes, showing no epiiueral sutures. Second segment 

 much louger on the median line, but shorter at the sides than the first; 

 the epimera occupy the anterior two-thirds of the lateral margin. Third 

 segment slightly louger than the second; the epimera occupying still 

 more of the lateral margin. Fourth segment of about the same length 

 as third ; the epimera occupying nearly or (juite all the lateral margin. 

 The remainiug three thoracic segments gradually decrease in size; the 

 epimera occupy the whole lateral margin and increase in size poste- 

 riorly. The first two abdominal segments are distinct and acute at the 

 sides. The third is similar to these at the sides, but is only separated 



