Coscinodiscus lineatus , Ehrenberg, 2 4 1839, p. 129. 



Coscinodiscus minimus , Karsten,** 1905, p. 78. 



Coscinodiscus simbirskianus , Grunow, 2 ^ 1884, p. 81. 



Dactyliosolen antarcticus , Castracane, 1° 1886, p. 75. 



According to Hendy, 1937, p. 323, this species exhibits 

 three phases -- "Antarcticus," "borealis," and "laevis." 

 The epithet used above designates only the "antarcticus" 

 phase. The other two forms were not encountered in the 

 collection. 



Eucampia balaustium, Castracane,*" 1886, p. 97. 



This form appeared frequently in the plankton but never 

 in great numbers. Its extreme variability has been noted 

 before (Hendy, 9 1937, p. 286 and J. Hart, personal comm.) 

 and at times it is rather difficult to identify on this account. 



Eucampia cornuta (Cleve), Grunow ex van Heurck, 2 " 1880-5, 

 pi. 95b, f. 5. 



Fragilariopsis antarctica (Castracane), Hustedt in Schmidt, 23 

 1913, pi. 299, fs. 9-14. 



Fragilariopsis antarctica f. bouvet , Karsten.H 1905, p. 123. 

 Hendy, 9 1937, p. 332, states that antarctica is probably 

 oceanic and the " bouvet " phase is probably neritic. The two 

 forms are frequently associated and, in the HIGHJUMP col- 

 lection, they are usually found together. 



Grammatophora marina (Lyngbye), Kutzing, 27 1844, p. 128. 



Guinardia flaccida (Castracane), H. Peragallo, 28 1892, p. 107. 



Navicula trompii Cleve var. major , Heiden and Kolbe, 2 ' 

 1928, p. 625. 



Nitzschia closterium (Ehrenberg), Wm. Smith, 30 1853, p. 42. 

 Hendy9 gives the apical axis of this form as "up to 80|i." 

 Numerous, longer cells, in the neighborhood of 100|i.in length, 

 were encountered in the HIGHJUMP collection. These forms 

 are easily confused with N. longissima (Brebisson) Ralfs, in 

 Pritchard, 15 1861, p. 7~83 . The length of N. longissima , 

 according to Cupp, 31 1943, p. 200, is 125-250H. 



75 



