Monthly Microscoplcall 
Journal, Aug. 1, 1869. J 
On the Microsco][)e Prism, 
79 
Microscopists have seen in some of the Foraminifera exquisite 
forms of flasks and decanters ; and in these plumules no one can 
fail to observe their elegance, beauty, and applicability to industrial- 
art purposes for forms and engravings of wine-glasses and goblets. 
The following is a list of the names and habitats of the insects 
to which the plates have reference : — 
EXPLANATION OF PLATES XXI., XXII., AND XXIII.* 
Lyc^na. 
Alexis. Europe. 
Icarius. „ 
Dorylas. „ 
Damon. „ 
Adonis. 
Acis. „ 
iEgon. 
Coelestina. „ 
Cory don. „ 
Orbitulus. „ 
Theophrastus. India. 
Alsus. Europe. 
Euphemus. „ 
Melanops. „ 
Unknown, and not named. 
Sebrus. Europe. 
Argus. „ 
Unknown, and not named. 
Do. 
Optilete. Europe. 
Hylas. „ 
Cassius. Brazil. 
Unknown. India. 
Telicanus. Africa. 
Unknown. 
Do. 
Do. 
28. Methymna. Cape Town. 
29. ^lianus. India. 
30. Elpis. „ 
31. Celeno. „ 
32. Erebus. Europe. 
33. Kandarpa. India. 
34. Argiolus. Europe. 
35. Unknown. 
36. Pseudargiolus. Canada West. 
37. Unknown, Australia. 
38. Do. „ 
39. Do. „ 
40. Do. 
41. Dipsas lycsenoides. Australia. 
42. Lycaena cardia. India. 
43. Lacturnus. „ 
44. Aratus. „ 
45. Cneius. „ 
46. Unknown. „ 
47. Danis Hylas. 
48. new species. 
49. „ 
50. Lycsena Alexis. 
51. ? new species. 
52. Danis, new species. 
53. Seb«. 
lY. — On the Microsco^pe Prism and the Structure of the Podura 
Scale ; heing a Postscript to the Paper "On the Diatom Prism 
and Diatom Markings" read he/ore the Boyal Microscopical 
Society, June 9, 1869. By the Kev. J. B. Keade, M.A., F.E.S., 
President of the Koyal Microscopical Society. 
The paper on the Diatom Prism contained an account of the nature 
and effect of the illumination as illustrated by the development of 
Diatom Markings. These were new to me, and at none of our 
meetings, either public or private, had I ever seen any exposition of 
* We here beg to acknowledge most gratefully the extreme courtesy of the 
Council of the Literary and Philosopliical Society of Manchester, by which we are 
permitted to reproduce the beautiful plates from its Transactions, in illustration 
of Mr. Watson's paper.— Ed. M. M. J. 
