— 143 — 



Stauroneis Ehb. 



160. N. (Stauroneis) africana Gl. GL New r. Diat. tab. III, fig. 15. 

 Solitary in a sample from KKt. 



Area: South Africa, Ceylon. 



161. N. (Staur.) anceps Ehb. var. hyalina Br. & Perag. Hérib. Diat. 

 d'Auv. tab. III, flg. 19. 



Solitary in a sample from KKt. 

 Area: Europe (fossil), Australia. 



Libellas Gl. 



162. M. (Libellus) hamulifera Grun. Gl. Syn. I, tab. III, figs. 17 & 19. 



KKm, KKt (2 samples). 



Area: Barbadoes, Mediterranean, Adriatic, Black Sea, Ceylon, Java. 



Dictyoneis Gl. 



163. > T . (Dictyoneis) marginata Lewis var. intermedia Gl. A. S. Atl. 

 tab. GLX, figs. 34-35. 



Found only in a sample from KMn — C Lt. 

 Area: Madagascar, Japan, Malay Archipelago. 



Trachyneis Gl. 



164. N. (Trachyneis) aspera Ehb. 



Of the numerous variants of this form I have found: 



var. conterinina A. S. A. S. Atl. tab. XL VIII, figs. 17 — 18. 



Proportionately broad (L. 0,032 mm., B. 0,on mm.), stauros not 

 reaching the margin. 



var. genuina Gl. V. H. Syn. tab. X, fig. 13. 



var. pulchella W. Sm. A. S. 1. c. fig. 6. 



var. vulgaris Gl. A. S. 1. c. fig. 5. 



Among the variants stated above the var. pulchella is most common. 



KKm, KKt, KMn— GLt (15 samples). 

 Area: var. contermina: Japan, Cape Horn. 



var. genuina : North Sea, Singapore, Amboina, Sydney, Samoa, Ta- 

 hiti, Hawaii, Pacific Ocean. 



var. pulchella-. North Sea, Philippines, Samoa, Sandwich Islands, 

 Malay Archipelago. 



var. vulgaris: Arctic America, North Sea, Madagascar, Cape of good 

 Hope, New Zealand, Samoa, New Caledonia, Malay Archipelago, Galapagos. 



