VEG A-EXPEDITIO X ENS VET E X S K AFLl C A A /.' /; K T E X. 



511 



N. elonyata Grun. (A. Schm. Atl. PL L, fig. 27—29). 



jV. canceUata Donk. — Length 0,o3 7. Stride 8 in 0,oi mm. 



N. Lyra Elib. 



N. Hennedyi W. Sm. 



N. spedahilis Greg. — In the sample from Bab-el-Mandcb- 

 there occur many intermediate varieties of the tliree last spe- 

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



iY. clrcumsecta Grun. (A. Schm. Atl. PI. XIII, fig. 27). 



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



X. forcipata Grev. (A. Schm. Nord. See Diat. PL I, fig. 45). 



N. splendida var. diplostlcta Grun. (A. Schm. Atl. PL XIII, 

 hg. 28). 



N. Apis Donk. (A. Schm. Atl. PL XIII, tig. 21). 



N. Weissflogit A. Schm. (Atl. PL XII, fig. 27). 



N. GriindJerl A. Schm. (Atl. PL XII, fig. 35-36). 



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



N. dacata var. elUptlca A. Schm. Atl. PL III, fig. 13. 



N. circumseda Grun. (A. Schm. Atl. PL 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 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. — PL 35, fig. 15. — This 

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

 Seyschells. 



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



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



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



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



iY. SmUJiii Breb. (A. Schm. Atl. PL VII, fig. 18—19). 



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



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



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



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



N. serridata A. Schm. (Atl. PL VII, fig. 42—43). 



N. Grceffii Grun. (A. Schm. Atl. PL Yll, fig. 5—6). 



N. 3Iusca Greg. (A. Schm. Nord Sea Diat. PL I, fig. 15). 



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

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



FJeurosigma formosum W. Sm. 



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



