KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 27. N:() 3. 43 



This species has the appearance of a small X. Iniimrosit, t'rdiii whiiji il, diH'crs l»y Hiier 

 stripe and closer piinctation. 



17. N. coiispersa Pant. (1S08). — V. broad, with almost parallel niarpjins and slightly 

 apiculate ends. L. (),063; B. 0,033 mm. Axial area narrow, very slightly dilated in the mifldle. 

 Stria? 11 in 0,oi mm., radiate at the ends, in the middle of equal length, punctate; puncta 13 in 

 0,01 mm. — Pant. Ill PI. XI f. 184. 



Habitat?: vKopecz» (Pant.). 



Resembles N. humerosa, but the median stria* are of erpial length. 



18. N. humerosa Brkb. (185fi). — V. broad, with parallel margins and rostrate to cuneate, 

 obtuse ends. L. (),().'> to 0,i; B. (),o,s to 0,042 mm. Axial area narrow, linear. Central area 

 orbicular or somewhat transversely dilated. Median line frequently with incrassate central pores 

 and hookshaped terminal fissures turned in the same direction. Striae to 10 inO.oi mm. radiate 

 or parallel in the ends, punctate; puncta 10 to 16 in 0,oi mm., forming undulating, longitiidinal 

 rows. Median strise of unequal length. — Sm. B. I). II p. 1)3. Donk. B. D. p. 18 PI. Ill f. 3. 

 A. S. Atl. VI f. 3, 4, 5. V. H. Syn. p. 98 PL XI f. 20. .V. quadrata Greg. T. M. S. IV p. 41 

 f. 5 (1856). Stauroneis crythrcea Grun. Verb. 1860 p. 567 PI. VI f. 17. N. hengalensis Grun. in 

 A. S. Atl. VI f. 1, 2 (1875). N. Kamorthensis Grun. Verb. 1863 p. 152 PI. V f. 16. A. S. Atl. 

 VI f. 8, 8*? 



Marine and brackish: Spitsbergen! Sea of Kara! Finmark! Baltic! North Sea! Mediterranean 

 Sea! Black Sea! Caspian Sea (Grun.), Red Sea! Seychelles! Nicobar Islands! Sumatra! Java! 

 Labuan! Sydney! Cameroon! 



Var. constricta. — V. slightly constricted in the middle. — Sumbava (Kinker Coll.)! Gulf 

 of Naples (Brun Coll.)! 



Var Fuchsli Pant. (1889). — Puncta nearest to the areas elongated. — N. (latissima var.?) 

 Fuchsii Pant. II p. 45 PI. X f. 170. 



Marine: Hungary, fossil (Pant.). 



N. humerosa is somewhat variable in the outline and the punctation of the strife. N. Ka- 

 morthensis in A. S. Atl. has somewhat convex margins. Similar specimens from Samoa (Van Hexirck 

 Coll.) differ in nothing else from N. humerosa. N. humerosa is allied with N. punctiilata, which 

 has, occasionally, longer and shorter striae intermixed in the middle. On the other hand it is 

 closely connected with N. latissima. 



19. N. monilifera Cl. — V. broad, with almost parallel margins and rostrate ends. L. 0,o7 7 

 to 0,1; B. 0,0 3 to 0,0,5 mm. Axial area narrow; central area orbicular, moderately large. Stripe 

 8 in 0,01 mm. radiate throughout. Puncta 7 to 8 in 0,oi mm. — N. (jranulata Breb. in Donk. 

 T. M. S. VI p. 17 PI. Ill f. 19 (1858). B. D. p. 17 PI. Ill f. 1. V. H. Syn. p. 98 PL XI f. 15. 

 N. (jranul. v. javanica Leud. Fortm. D. de Malaisie p. 17 PL II f. 2 (1892)? 



Marine: North Sea! Ceylon! Madagascar! 



Var. heterosticha Cl. — Strise 8 in 0,oi mm., in the middle alternately longer and shorter. 

 Puncta 10 to 11 in 0,oi mm. — N. granulata A. S. Atl. VI f. 15. 16. 



Marine: Hungary, fossil (Deby Coll.)! 



N. monilifera is closely akin to N. humerosa, from which it differs principally by its coarser 

 punctation. The median strise are in most specimens of equal length, but this is subject to great 

 variation and some shorter rows of puncta are occasionally intermixed in the middle of the valve. 

 As the name N. granulata was used by Bailey 1854 for another species, I have been obliged to 

 change the name. 



20. N. latissima Greg. (1856). — V. elliptic-lanceolate. L. 0,0,5 to 0,13; B. 0,o4 to 0,o5 

 mm. Axial area narrow, distinct. Central area orbicular. Strise 7 or 8 (middle) to 9 or 10 

 (ends) in 0,oi mm., radiate, at the ends parallel, punctate; puncta about 11 in 0,oi mm. The 



