THE DIATOMS OF CANADA 123 



7. Diatoms from Pakuy Souxd, Oxtario (W. B. Tindall). 

 Collected hy U. C. }Vheeler, Montreal. 



IdeMxfied and measured by L. W. Bailey and A. H. MacKuy. 



Cocconeis pediculus E. 32 (22), 30 (21). 



Cymhella cuspidata Ktz. 34 (3:11:3). 



Diatoma vulgare Bory. v54 (7:10:7) s 7. 



Encyonema gracile Rabh. or Amphora lanceolate var. ? 28. 



" turgidum (Greg). Grun. v40 (11) s7-8. 



Eunotia diodon E. v40. 



" formica E. vll7 (11:8:9:8:11) sll, vl30, vl80. 

 " maior Rab. v235 (19:13:15:13:19). 

 " monodon E. v48 (8:10:8) sl2. 



" pectinalis Rab. v80. 



" " var. curta t55 (8:11:8). 



" " yar. undulata Half s. V104: (5:7:5). 



" rohusta, var. tetraodon (E) Ralfs. v48 (20). 

 Ih'agilaria capucina Desm. ? z77 (19/2) slO. 



" €ntomo7i E. ? zl6 (24/6) 50. 



" mutahilis var. intercedens W. Sm. z22 (8) s5. 



Frustulia rhomhoides (E)De Toni var. amphipleuroides Grun. vl23 (10:22:10) e? 



vl30 (7:15:7) s? 



Gomphonema accuminatum E. var. coronatum v56 (8:16:14). 

 " lanceolatum E. var. insignis v50. 



Melosira crenulata Ktz. z8 (8) sl6. 

 Navicula divergens "W. Sm. v85 (17) slO. 



" nohilis E., (near major). vl98 (23:29:23) s6-7. 



" radiosa Ktz. v72 (11) slO. 



" rostellata Ktz. v63 (5:14:5) s9. 



" Smithii Breb. v69 (37) s7. 



" tenella Breb. v38 (0:8:0) sl8. 



Nitzschia angustata (W. Sm.) Grun. v42 (0 :8 :0) sl3. 



" fluminensis Grun. (?) vl60 (0:8:0) s5 & 0. 



" verniicularis (Ktz) Grun. 200 (6:6:5:6) s? 



Pleurosigma acuminatum (Ktz Grun. vl23 (16), 134 (16), 149 (11). 



(Some forms like P. Spenceri W. Sm.). 

 Stauroneis PJwenicenteron E. vl85 (12:24:12) sl3. 

 Stephanodiscus Niagarae E. 20 (20), 27 (27), 30 (30) s6 & 12. 

 Surirella amphioxys W. Sm. v33 (16), 40 (17) s3, 



" Guatimalensis Grun. vl28 (64) s3, 136 (64) s3+ 



" Molleriana Grun. v43 (13) s9+ 



" rohusta E. vl30 (40) sl.4., 160. 



" rohustior MoK. vl40 (61) s.5 (Yar. of rohusta'). 



" - splendida var. hifrons A.S. vl38 (43). 

 Synedra delicatissima W. Sm. v256 (3:5:3) slO. 



" ulna var. zl89 (24:6:24) s9-10, v8S (3:7:3). 

 Tahellaria fenestrata Ktz. 85, 74, 53, 51. 



(Spicules, smooth and rough, o£ Fresh Water Sponges also present). 



