162 THE ROYAL SOCIETY OF CANADA 



Amphora binodis Greg, var (?). 53(13)sl8, 65(12)s?. 

 " " var. bigibba Grun. 20(7)s ?, v54. 



« Clara A.S. 47(ll)s8. 



" costata Sm. v33, v50(10)s8. 



" cymbifera Greg. 50(8)s9. 



« dubia Greg. var. ? 46(9)sl4, 55(13)slO. 



Eunotia CI. 49(7.5)sl5. 

 " exigua Greg. 33 (5)sl 7. 



" hyalina Ktz. 50(10)sO, 75(15)sO. (One-sixteenth oil-im- 



mersion) . 

 " macilenta Greg. 3 7 (9) si 5. 



" marina (Sm). z31(17)sl6. 



" avalis Ktz. 37(9)sl4, 48(9)sl4. 



" " var. afinis Ktz. 25(7)sl3. 50(7)sl3. 



" " var. marina Sm. 28(9)sl6. 



" proteus Greg. .45(9)sll, 52(9)sl3. 

 " pusio var. parvula Floegel. 21(17)sl7. 



" scabriuscula CI, 50(22) s6. 



" salina Sm. (Kendall). 



" turgida Greg. 35(6)s7-8, 50(12)s8. 



Arachnodiscus Ehrenbergii Bail. var. ? v(200)s7. 

 Asterionellaformosaliassel. var. ? (Nea.rA.BleakeleyiSm.). 57(5:3:4)sO. 



" notata Grun. ? 140(6)s0. 



Asteromphalus arachne Bréb. (51)s6. 



Aulacodiscus Oregonus Bailey, v.n. v(100)s7-6, eight-rayed. 

 Auliscus caelatus Bailey, var. riphis A.S. (60). 



" sculptus Sm. 

 Asterolampra Ehr. Sp. ? (Bailey). One specimen. 

 Biddulphia aurita Bréb. z(4+10+14+9-F3) (20)s6, z(13-|-29+ 14) 

 (18)s8, z55(33)slO. 

 granulata Roper. (Kendall). 

 obtusa Ralfs. z38(22)s9, z60(50)s9. 

 Roper iana Grev. 

 suborbicularis Grun. v31(30)s8. 



n.sp. z(15 + 15 + 24+15-M5) (36)sll:20. Horns uniform, 

 truncate, slightly co verging, 15 microns long; head 15 

 microns long with two bristles arising from the convex 

 centre extending beyond the horns, sculpture dots about 

 11 in ten microns. Connective zone 24 long 36 broad 

 with a quincunce hatching very fine about 20 to 10 microns. 

 The remaining symmetrically like the first two parts 

 described. Resembling in some respects B. longicruris 

 Grev. var. Japonica, or B. longicruris Grev., or B. Chinen- 



