KONGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 27. N:0 3. 43 



This species has the appearance of a small N. humeroaa, from which it differs by finer 

 striiE and closer punctation. 



17. N. conspersa Pant. (1893). — V. broad, with almost parallel margins and slightly 

 apiculate ends. L. 0,063; B. 0,o33 mm. Axial area narrow, very slightly dilated in the middle. 

 Striaj 11 in 0,0 1 mm., radiate at the ends, in the middle of equal length, punctate; puncta 13 in 

 0,01 mm. — Pant. Ill PL XI f. 184. 



Habitat?: »KOpecz» (Pant.). 



Resembles N. humerosa, but the median striae are of equal length. 



18. N. humerosa Br^b. (1856). — V. broad, with parallel margins and rostrate to cuneate, 

 obtuse ends. L. 0,o5 to 0,i; B. 0,o3 to 0,o42 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. Strise 9 to 10 in 0,oi mm. radiate 

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

 rows. Median strise of unequal length. — Sm. B. D. II p. 93. Donk. B. D. p. 18 PL III f. 3. 

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

 f. 5 (1856). StqLuroneis erythrcea Grun. Verh. 1860 p. 567 PL VI f. 17. N. hengalensis Grun. in 

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

 VI f. 8, 8*? 



Marine and brackish: Spitsbergen! Sea of Kara! Einmark! 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 Fuchsii Pant. (1889). — Puncta nearest to the areas elongated. — N. (latissima var.?) 

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



Marine: Hungary, fossil (Pant.). 



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

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

 Coll.) differ in nothing else from N. humerosa. N. humerosa is allied with iV. punctulata, 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,] ; B. 0,03 to 0,0 5 mm. Axial area narrow; central area orbicular, moderately large. Striae 

 8 in 0,01 mm. radiate throughout. Puncta 7 to 8 in 0,oi mm. — N. granulata Br^b. in Donk. 

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

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



Marine: North Sea! Ceylon! Madagascar! 



Var. heterosticha Cl. — Striae 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 striae 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,o5 to 0,i3; B. 0,o4 to 0,o5 

 mm. Axial area narrow, distinct. Central area orbicular. Strife 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 



