Thalassiosira antarctica , Comber, ' 1896, p. 491. 



This variable species is usually very common in antarctic 

 waters but was comparatively rare in the HtGHJUMP collection. 



Thalassiosira decipiens (Grunow ex van Heurck), Jorgensen, 



1905, p. 96. 



Reported formerly from the Pacific, as occurring in the 

 Peru Current, by Hendy, 9 1937, p. 239. 



Thalassiotrix longissima (Cleve and Grunow) var. antarctica, 



(Schimper ex Karsten) Cleve and Moller. 



The taxonomy of this form is extraordinarily confused. 

 Hendy, " 1937, p. 335 refers to it as T. antarctica Karsten. 

 Karsten, however, 1905, p. 124, designates it T. antarctica 

 Schimper, referring apparently to Schimper's Mss. notebook. 

 Hendy, therefore, should have accorded the authority to 

 Schimper ex Karsten. In a personal communication from 

 Prof. Ruth Patrick, the form is referred to as T. longissima 

 var. antarctica , with the authority quoted as Cleve and Moller 

 Type-slide No. 125. The author is constrained to agree with 

 Prof. Patrick that this form does not warrant specific rank, 

 but is merely a variety of T. longissima . Although the author 

 has been able to trace no published authority for this variety, 

 he accords it to Cleve and Moller on the basis of Prof. Pa- 

 trick's comments. This is one case where the Rules of 

 Taxonomy should be suspended to obviate the ridiculous 

 nomenclature given above. 



The diatom is extremely common in the plankton and is 

 frequently one of the dominant forms. 



Tropidoneis antarctica , (Grunow), Cleve, 41 1894, p. 24. 



Tropidoneis glacialis var. constricta, Heiden and Kolbe, 7 

 1928, p. 656. 



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