388 Proceedings of the Royal Irish Academy. 
Bac., p. 98. Gregory, Diat. of Clyde, p. 481, Pl. ix., fig. 11. Ralfs, 
in Pritch., p. 898. Rab. Fl. Eur. Alg. sect.i., p. 188. Donkin, N. H. 
Brit. Diat., p. 10, Pl. ii, fig. 1. Schmidt, Atlas der Diat.,. T. iii., 
fig. 31. 
Arran Islands, Stomachs of Ascidians, Roundstone Bay ; stomachs 
of Ascidians, Broadhaven Bay, Co. Galway. 
Navicula morett, N. Sp. Marine. 
Valve very large, broadly elliptical, somewhat rhombical ; marginal 
band of striz broad in the middle, diminishing towards the ends ; 
median band of strie narrow, terminating considerably short of the 
central nodule; intermediate space between the inner and outer bands 
of striz broad, unstriate; strie fine, but distinctly moniliform ; nearly 
parallel in the middle, slightly radiate towards the ends; length -0075, 
breadth -0037. (Plate 32, fig. 28.) 
Navicula kittoniana, Schmidt, Atlas der Diat., T. ii., fig. 10. 
The form having been exhibited by me some years ago at the Meeting 
of the Dublin Microscopical Club, under the name of Navicula moreii, 
the latter designation has the priority. Schmuidt’s locality is Rio 
Janeiro. : 
Stomachs of Ascidians, Broadhaven Bay; stomachs of Ascidians, 
Roundstone Bay, Co. Galway. 
Navicula sandriana, (Grunow). Marine. 
Valve nearly orbicular; marginal band of strie narrow, of equal 
breadth till near the ends, where it widens, and then suddenly nar- 
rows; median band of striz very narrow, not reaching the median 
line, and terminating at some distance from the central nodule ; inter- 
mediate space between the inner and outer bands of strize wide, orna- 
mented with iregularly disposed indistinct puncta, and having in 
the middle a narrow, longitudinal lunate band of small, but distinct, 
puncta; striz of the marginal band moniliform, radiate; striz of the 
inner band punctate, and parallel; length about 0040, breadth about 
"0030. (Plate 32, fig. 29.) 
This form was exhibited by me at a Meeting of the Dublin Micro- 
scopical Club as Navicula ceelata, but subsequently I discovered that 
the species had been described in 1863 by Grunow as Navicula san- 
driana, which designation, having the priority, must be permitted to 
stand. 
Grunow, Verhand. der K. Zool. Bot. Gesell., Band xu., 1863, 
p. 153,. T. 1v:; fig. 5:. Schmidt, Atlas: der Diat:,. T.. m1., fig.) 10. 
Grunow’s locality for the species is the Adriatic Sea. I may here 
remark that my specimens differ from those figured by Grunow and 
Schmidt, by the fact that in mine the outer band of striz expands 
perceptibly near the ends, a feature which is not noticeable in the 
figures referred to above. 
Stomachs of Ascidians, Roundstone Bay, Co. Galway. 
