3o8 REPORT OF NEW JERSEY STATE MUSEUM. 



S. I. Smith, Trans. Conn. Acad., V, 1879, p. 106. Great Egg Harbor, 



New Jersey ; Great South Bay, Long Island ; New England. 



M. J. Rathbun, Occas. Papers Boston Soc. N. Hist., YH, 1905, p. 27. 



(Connecticut to Maine.) 

 Mysis americanus Benedict, Rep. U. S. F. Com., XI, 1883 (1885), p. 176. Oflf 



Montauk Point, Long Island. 

 Mysis spinulosus De Kay, N. Y. Fauna, Crust., VI, 1844, p. 31. PI. 7, fig. 20. 



New York coast. 



Description. — Anterior edge distinctly rostrated, but only 

 slightly projecting, evenly rounded, and inferior angle project- 

 ing into sharp tooth. Antennules of male with densely ciliated 

 sexual appendage, outer flagellum nearly long as body and inner 

 slightly shorter. Antennal scale about three-fourths long as 

 carapace, about nine times long as broad, tapering regularly 

 from base to very long acute tip and both edges ciliated. Ap- 

 pendages of fourth abdominal segment in male as usual in 

 typical species. Outer ramus slender and naked, its pair of 

 terminal stylets equal in length, slender, curved toward tip, and 

 distal half armed with numerous short setae. Ultimate segment 

 of ramiis itself little more than half long as stylets, and penul- 

 timate segment four or five times long as terminal. Inner 

 lamella of appendages of sixth segment about long as telson, 

 narrow, slightly broadened at base, and tapers to slender obtuse 

 point. Outer lamella one and one-half as long as inner, eight 

 times long as broad, slightly tapering, and end subtruncate. Tel- 

 son triangular, broadened at base, lateral edges slightly convex 

 posteriorly, and armed with stout spines alternatingwith intervals 

 of several smaller ones. Telson tip very narrow, truncate, 

 armed with stout spine each side, and two small ones filling 

 space between their bases. Length 12 mm. (S. I. Smith.) 



Remarks. — This species, originally found at Beesley's Point, 

 ranges northward along the New England coast. Smith men- 

 tions having secured it in April, in pools upon the salt marshes. 

 It has also been found below low water, as among sea-weeds, to 

 a depth of thirty fathoms. It is found among algae and in the 

 stomachs of fishes. Verrill says it occurs in immense numbers 

 among the algae growing on rocks just below low- water mark, 

 especially in spring. It is an important species, as it forms one 



