Asteromphalus parvulus , Karsten, 1905, p. 90. 



Asteromphalus roperianus, Ralfs ex Pritchard, 1 ^ 1861, p. 838. 



Chaetoceros chunii, Karsten, 1 1905, p. 117. 



Chaetoceros criophilum, Castracane, 1 " 1886, p. 78. 



This is a very characteristic antarctic form. According 

 to Hendy,° it very often dominates the plankton, together 

 with Corethron criophilum (q.v.), in the extreme south. 



Chaetoceros dichaeta, Ehrenberg,17 1844, p. 200. 



Chaetoceros didymum , Ehrenberg, 1 ^ 1845, p. 75. 



Chaetoceros neglectum , Karsten, 11 1905, p. 119. 



This characteristically antarctic form has formerly 

 been reported in great numbers around the South Shetlands, 

 South Georgia, South Sandwich Group, the Weddel Sea, and 

 Bellingshausen Sea. 



Chaetoceros pelagicum , Cleve, 1 " 1873, p. 11. 



Chaetoceros peruvianum, Brightwell,20 1856, p. 107. 



Charcotia bifrons (Castracane), M. Peragallo, 21 1921, p. 78. 



Corethron criophilum , Castracane, lo 1886, p. 85. 



Hendy° is followed in regarding Corethron as a mono- 

 typic genus. His comments on the various phases of this 

 species are very complete and cannot be added to here. The 

 species was not separated into phases or forms in this report, 

 but all the forms did occur in the collection, frequently 

 together. 



Coscinodiscus australis , Karsten, 11 1905, p. 79. 



Coscinodiscus excentricus , Ehrenberg,22 1840, p. 146. 



Coscinodiscus gracilis, Karsten, 11 1905, p. 78. 



This identification should be treated with suspicion. This 

 form has not been reported heretofore from the Pacific. 



Coscinodiscus lentiginosus , Janisch in Schmidt, 23 1878, p. 58. 

 The type locality of this form is the Antarctic Ocean. 



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