54 F. E. FRITSCH. 



curvature of the raplie at the ends of the valves, and in the widely separated strife. 

 Si inic. of the specimens (fig. 100) of A. stauropteroides showed practically no dilation 

 of the poles of the valves. 



NITZSCHIA.CE.E. 



Genus HANTZSCHIA Grun. 

 89. HANTZSCHIA AMPHIOXYS. 



Hantzscltia amphioxys (Ehri'iib.) Grun., in Cluve and Grunow, Aret. Dial., K. Sv. Vefc.-Ak. Handl., XVII. 



(1 ssi i), No. 2, p. 10:-;. 



Long. valv. 37-42 jj. ; hit. valv. = 7-8 /j.. 



Hull. Freshwater pond, Granite Harbour, January 20th, 1902. 



90. HANTZSCHIA ELONGATA. 



Hantzscliia eloiii/at// (Hantzsch) Grim., in Clcvc and Grunow, o/i. cit., p. 104 ; Van Hcurck, op. fit., p. 1C9, 

 PI. LVL, figs. 7 and s. 



Long. 176 p; lat. lOju. 



Hull. Gap pond, Winter Harbour ; rare. 



SUKffiELLACILE. 



Genus SURIRELLA Turpiu. 

 91. SURIRELLA ANGUSTA. 



Kurirella ani/tuta Kiitz., Bacill. (is 44), p. Ill, Tab. 30, lijr. -'c'. 



Long. valv. = 30 /M ; lat. valv. = 8 p.. 



Ha/>. In freshwater ice under boulder, Cape Adare, January 9th, 1902. 



