

TRANSACTIONS OF MICROSCOPICAL SOCIETY. 



DESCRIPTION OF PLATE I, 



Illustrating Professor Gregory's paper on the Diatomacea of the 



Grlenshira Sand. 

 Fig. 



"24. — Pleurosigma, not named, sp. ? 

 25. — Cocconeis distans, n. sp. X 600. 

 2(5. — Cocconeis radiata, n. sp. x 800. 



26*. — „ „ „ Abnormal form of the same. 



27. — Cocconeis costata, n. sp. x 800. This is a small specimen. 

 28. — Cocconeis lamprosticla, n. sp. 

 29. — Amphora rectangularis, n. sp. 



30. — Amphora elegans, n. sp. A detached valve. X 600. 

 31. — Amphora plicata, n. sp. 

 32. — Amphora biseriata, n. sp. X 600. 

 33. — Amphora lineata ? n. sp. ? X 600. 

 34. — Amphora obtusa, n. sp. 

 34*. — „ „ A detached valve. 



35. — Amphora crassa, n. sp. X 600. 

 36. — Amphora Grevilliana, n. sp. x 600. 

 36*. — ,, „ A detached segment. 



37.— Amphora Areas, n. sp., showing many segments in apposition. The 



detached segments are figured in my first paper on the Glenshira 



Sand. See 'Quarterly Journal of Microscopical Science,' vol. iv, 



PI. IV, fig. 4. 

 38. — Amphiprora minor, n. sp. X 600. 

 39. — Amphiprora lepidoptera, n. sp. The front view. (The side view is 



figured in the plate above referred to (under fig. 37) as Amphiprora 



vitrea, (3 ?) This specimen is from | to \ shorter than what I now 



find to be the average length of this fine species. 

 40. — Amphiprora ? recta, n. sp. The second figure, mentioned in the text, 



is omitted for want of room. 

 41. — Campylodiscus simulans, n. sp. 

 42. — Campylodiscus bicruciatus, n. sp. x 800. 

 43. — Tryblionella apiculata, n. sp. ? x 800. 

 45. — Nitzschia t socialis, n. sp. x 600. 

 46. — Nitzschia insignis, P. V., n. sp. 

 46*.- „ „ S.V., „ 



47. — Eupodiscus sparsus, n. sp. ? x 600. 

 48. — Disc, not named, n. sp. ? 

 50. — Disc, not named, n. sp. x 600. 

 51. — Amphiprora ? not named, n. sp. ? X 600. 

 52. — Disc, probably one of the Poly cystines, x 600. 

 53. — Oval form. Diatomaceous ? or one of the Polycystinece ? X 600. 

 54. — Synedra Baculus. n. sp. 



Figs. 44, Nitzschia distans, and 49, a disc, not named, have been omitted 

 for want of space, but will be given on a future occasion. 



Although many of the above figures are magnified to 600, and some to 

 800 diameters, yet they all vary in size to such an extent that specimens 

 might have been selected which, magnified 400 diameters, would have been 

 of the same length as the figures. — W. G. 



The figures to which no mark of the magnifying power is attached are drawn 

 to a scale of 400 diameters. 



