VEG A-EXPEDITIONENS VETENSKAPLIGA ARBETEN. ll 
N. elongata Grun. (A. Schm. Atl. Pl. L, fig. 27—29). 
N. cancellata Donk. — Length 0,0o37. Strie 8 in 0,01 mm. 
N. Lyra Ehb. 
N: Héennedyi W. Sm. 
N-. spectabilis Greg. — In the sample from Bab-el-Mandeb 
there occur many intermediate varieties of the three last spe- 
cies, so that no limit between them can be established. 
N. circumsecta Grun. (A. Schm. Atl. P1. XIII, fig. 27). 
N. abrupta Greg. (A. Schm. Atl. Pl. III, fig. 1—2). 
N. forcipata Grev. (A. Schm. Nord. See Diat. P1. I, fig. 45). 
|. splendida var. diplostieta Grun. (A. Schm. Atl. Pl. XIII, 
Weissflogii A. Schm. (Atl. P1. XTI, fig. 27). 
N. Griändleri A. Schm. (Atl. P1. XII, fig. 35—36). 
N. dalmatica Grun. (A. Sechm. Atl. P1. VIIT, fig. 58). 
N. elavata var. elliptica A. Schm. Atl. Pl. III, fig. 13. 
N. cirewmsecta Grun. (A. Schm. Atl. P1. III, fig. 27—28). 
N. transfuga Grun. Mpt. — Oval, with somewhat protracted 
ends. Valve with a depression on each side of the median 
line, covered with punecta, arranged in somewhat radiant lines, 
10 in 0,01 mm., reaching the median line, except around the 
central nodule, where these are some wedge-shaped areas. 
. 28 
N. Apis Donk. (A. Schm.: Atl. P1. XIII, fig: 21). 
EN 
Length 0,07 mm. Breadth 0,0388 mm. — Pl. 35, fig. 15. —- This 
species has been found by Mr. Grunow in gatherings from the 
Seyschells. 
N. pretexta Ehb. (A. Schm. Atl. P1. III, fig. 30—34). 
N. brasiliensis Grun. (A. Schm. Atl. P1: VI, fig. 25). 
N. Baileyana Grun. (A. Schm. Atl. P1. VI, fig. 26—27). 
N. lacrimans A. Schm. (Atl. P1. XII, fig. 59—61). 
N. Smithit Bréb. (A. Schm. Atl. Pl. VII, fig. 18—19). 
N. mitescens Greg. (A. Schm. Atl. P1. VII, fig. 38—39). 
N. mmmularia Grev. (A. Schm. Atl. Pl. LXX, fig. 38—40). 
N. Campylodiseus Grun. (A. Schm. Atl. P1. LXX, fig. 64). 
N. Eudozia A. Sechm. (Atl. PI: LXX, fig. 71). 
N. serrulata A. Schm. (Atl. P1. VII, fig. 42—43). 
N. Grefiui Grun. (A. Schm. Atl. P1. VII, fig. 5—6). 
N. Musca Greg. (A. Schm. Nord Sea Diat. Pl. I, fig. 15). 
Alloioneis antillarum Cl. & Grun. (Bih. t. Kongl. Sv. Vet. 
Ak. Elland TIM: NOS; paso Pl I ferll). 
Pleurosigma formosum W. Sm. 
P. australe Grun. (Novara. pag. 21, Pl. I, fig. 18). 
