THE MICROSCOPE. 3 
7. Sceptrionis gemmata and caduceus. 
8. Eupodiscus Argus, 3, 4 and 5 processes. 
9. Systephania corona and diadema. 
1o. Podosira Neumayerii. 
tz. Orthosira Marina. 
12. Actinoptychus senarius. 
13. Heliopelta Metii. 
14. Mastogonia—various. 
15. Biddulphia Tuomeii. 
16. Dyctiocha—great variety. 
17. Triceratium undulatum. 
18. obtusum., 
19. e condecorum—Brightwell. 
20. 4 Marylandica. 
ar. ae Americanum—Ralfs. 
22° - Punctatus. 
22. Solanoceros. Ehr. 
24. Fischeri. Schmidt. 
25. Raphoneis pretiosa and rhombus. 
26. Navicula Lyra. 
27. 4 du Vorigens. Schmidt. 
28. Asterolampra Marylandica. 
29. Pyxidicula cruciata and appendiculata. 
30. P Angulatum—large form. 
31. P Virginica similar to Richmond. 
32. Hemiaulus Bifrons—Grunow. 
33. Cyclotella, several species. 
BRIEF BIOGRAPHICAL SKETCH OF ROBERT TOLLES. 
BY HON. THOS. BARLOW, OF CANASTOTA, N. Y. 
Mr. Tolles put himself under the instructions of the far famed 
Charles A.Spencer as an apprentice in the art of manufacturing 
optical instruments in about 1845 or 6,in his boyhood. He was a 
young man of steady, industrious habits, and applied himself closely 
to his pursuit. 
He held Mr. Spencer in the highest estimation and made him 
his study as well as master. His genius was promising, and Spencer 
saw in him a hopeful future. 
