482, REPORT OF NEW JERSEY STATE MUSEUM. 

 Family CYCLOPID.^. 



Genus OITHONA Baird. 



OUhona Baird, Zoologist, 1843, p. 59. Type Oithona pluniifcra Baird. mono- 



typic. 

 Scribclla Dana, Ann. Mag. N. Hist. London, XVIII. 1846, p. 183. Atypic. 



(Type Scribclla scriba Dana, U. S. Expl. Exped. Crust., 1852, p. 1045, 



monotypic.) 

 Oithonella Sars, Norsk. Nordh. Exped. Crust., II, 1885 (1886), p. 79. Type 



Oithonella helgolandica Claus, monotypic. 



Oithona plumifera Baird. 



Oithona plumifera Baird, 1. c, fig. b. A'. Lat. 3° 24' W. Long. 2y° 7'. 



Wheeler, Bull. U. S. F. Com., XIX, 1899 (1901), p. 186, fig. 22. 



Gulf Stream 70 miles south of Martha's Vineyard. 



Sharpe, Proc. U. S. Nat. Mus., XXXVIII, 191 1, p. 407 (on Wheeler). 



Gulf Stream. 



Genus CYCLOPS Miiller. 



Cyclops. 



I am greatly indebted to Mr. R. A. Spaeth for the opportunity 

 of examining his MSS., and here recording the species of this 

 variable and difficult genus. Mr. Spaeth spent several years in 

 studying the species in the vicinity of Haverford, Pennsylvania. 

 His researches are incorporated in an excellent and elaborate 

 MS. memoir, well illustrated by his own hand. In view of the 

 absence of any work on the Pennsylvania species it is hoped he 

 will allow it to pass through the press at an early date. The 

 arrangement of the species is thus in accordance with Mr. 

 Spaeth's list, though several forms he has not found, wdiich have 

 been recorded elsewhere within the limits of the Middle Atlantic 

 States, are placed provisionally under the various subgenera. 

 The precise locality where Mr. Spaeth's material was obtained 

 is a single small pond on the estate of Mr. McFadden, directly 

 on the south side of the Philadelphia and Western Railroad 

 tracks and to the right of the bridge that crosses these tracks 

 at "Haverford" station. 



