VEOA-EXPEDITIONENS V ET EN S K APLl G A AP.riETEN. 



511 



N. elongata Grun. (A. Schm. Atl. PI. L, fig. 27—29). 



N. cancdlata Donk. — Length 0,o37. Strise 8 in 0,oi ram, 



N. Lyra Ehb. 



N. Hennedyi W. Sm. 



N. spedaUlis Greg. — In the sample from Bab-el-Mandeb 

 there occur many intermediate varieties of th^ three last spe- 

 cies, so that no limit between them can be established. 



N. circunisecta Grun. (A. Schm. Atl. PI. XIII, fig. 27). 



N. abrupta Greg. (A. Schm. Atl. PI. Ill, fig. 1—2). 



N. forcipata Grev. (A. Schm. Nord. See Diat. PI. I, fig. 45). 



N. splendida var. diplostkta Grun. (A. Schm. Atl. PI. XIII, 

 fig. 28). 



N. Apis Donk. (A. Schm. Atl. PI. XIII, fig. 21). 



N. Weissflogii A. Schm. (Atl. PI. XII, fig. 27). 



N. Grundleri A. Schm. (Atl. PI. XII, fig. 35-36). 



N. dalmatica Grun. (A. Schm. Atl. PI. VIII, fig. 58). 



N. clavata var. elliptica A. Schm. Atl. PL III, fig. 13. 



N. circumseda Grun. (A. Schm. Atl. PL III, fig. 27—28). 



N. transfuga Gruu. Mpt. — Oval, with somewhat protracted 

 ends. Valve with a depression on each side of the median 

 line, covered with puncta, 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. 

 Length 0,07 mm. Breadth 0,o38 mm. — PI. 35, fig. 15. — This 

 species has been found by Mr. Grvinow in gatherings from the 

 Seyschells. 



N. prcetexta Ehb. (A. Schm. Atl. PL III, fig. 30-34). 



N. irasiliensis Grun. (A. Schm. Atl. PL VI, fig. 25). 



N. Bailey ana Grun. (A. Schm. Atl. PL VI, fig. 26—27). 



N. lacrimans A. Schm. (Atl. PL XII, fig. 59—61). 



N. Smithii Breb. (A. Schm. Atl. PL VII, fig. 18—19). 



N. nitescens Greg. (A. Schm. Atl. PL VII, fig. 38—39). 



N. nummularia Grev. (A. Schm. Atl. PL LXX, fig. 38—40). 



N. Campyhdiscus Grun. (A. Schm. Atl. PL LXX, fig. 64). 



N. Eudoxia A. Schm. (Atl. PL LXX, fig. 71). 



N. serrulata A. Schm. (Atl. PL VII, fig. 42-43). 



N. Grceffn Grun. (A. Schm. Atl. PL VII, fig. 5—6). . 



N. Musca Greg. (A. Schm. Nord Sea Diat. PL I, fig. 15). 



Alloionds antillarum CI. & Grun. (Bih. t. Kongl. Sv. Vet. 

 Ak. Handl. T. V. No 8, pag. 8, PL II, fig. 11). 



Pleurosigma formosum W. Sm. 



P. australe Grun. (Novara. pag. 21, PL I, fig. 18). 



