KONGL. SV. VKT. AKADEMIENS HANDLINCxAR. BAND 27. N:0 3. 63 



Var. Couperi Bail. (1850). — V. slightly constricted in tlie middle. — Pinnul. Uouperi 

 Bail. Smiths Contr. II p. 39 Pl. II f. 33. 



Marine: Florida (Bail.). 



Var. Kittoniana A. S. (1874). — V. broadly lanceolate. L. 0,o7r, to 0,i5; B. 0,04 to 0,o8 

 mm. Striee 7, ,5 to 10, jn;ncta 10 to 15 in 0,oi mm. — N. Kittoniana A. S. Atl. II f. 10. 



Marine: Brazil (Deby Coll.)! Porto Segnro (Deby CoU.)! Colon (Deby Coll.)! Pensacola! 

 Campeaehy Bay! Sierra Leone (Deby Coll.)! Red Sea! Ceylon (Leud. Fortm.), Seychelles (Van 

 Henrck Coll.)! Mauritius (Deby Coll.)! 



31. N. tiirgidula Pant. (1893). — V. broadly elliptical witli rounded ends. L. 0,04?; 

 B. 0,03.3 mm. Lateral areas narrow, broader in tbe middle and convergent at tbe ends. Strise 

 13 in 0,01 mm. coarsely pnnctate. — Pant. III Pl. XXXII f. 462. 



Marine: Hnngary, fossil (Pant.). 



32. N. Lyra Ehb. (1843). — V. elliptical with ronnded or rostrate ends. L. 0,o5 to 0,i8; 

 B. 0,026 to 0,06 mm. Lateral areas narrow, linear, constricted in tlie middle, or not, divergent at 

 tbe ends or not. Strise 6 to 14; puncta 7 to 18 in 0,oi mm. 



Var. elliptica A. S. (1874). — V. elliptical, with ronnded to snbrostrate ends, or snbhexa- 

 gonal. L. 0,12 to O, is; B. 0,04 to 0,06 mm. Lateral areas linear, convergent towards the ends. 

 Strisi 6 to 7, puncta 7 to 11 in 0,oi mm. - N. S. D. Pl. I f. 39. Atl. II f. 29. V. H. Syn. X 

 f. 2. Janisch Gazelle Exp. XV f. 23. 



Marine: North Sea! Mediterranean Sea! Red Sea! Ceylon! Madagascar! Seychelles (Van 

 Henrck Coll.)! Sumatra (Deby Coll.)! Philippines! Singapore! Fossil: Moravian Tegel! 



Forma hulJata Norm. (1861). — L. 0,i3 to 0,i6; B. O, os to 0,07 mm. Areas with a row of 

 large puncta. Strite 6, puncta 11 in 0,o i mm. — N. hullata Norm. T. M. S. 1861 p. 8 Pl. II f. 7. 

 A. S. Atl. III f. 8—9. 



Marine: Ceylon (Letourneur Coll.)! Macassar Straits (Grrove CoU.)! Japan (Atl.), Australia 

 (Norm.), Samoa (Atl.). 



Var. Ehrenhergii Cl. — V. elliptical, with rostrate ends. L. 0, 0.5 to 0,i6.t; B. 0, 026 to 

 0,o.i4 mm. Lateral areas constricted in the middle, with divergent ends. Strite 9 to 12, puncta 

 16 to 21 in 0,01 mm. — N. Lyra Ehb. Am. I: 1 f. 9 a. Greg. D. of Clyde Pl. IX f. 13 h. Jan. 

 Rabh. Honduras D. Ill f. 7. Janisch Guano Pl. I A f . 26. Donk. B. D. p. 14 Pl. II f. 7. 

 A. S. Atl. II f. 11, 16, 25. V. H. Syn. p. 93 Pl. X f. 1. Janisch Gazelle Exp. XV f. 13. N. Gre- 

 goryana Grev. M. J. V. p. 10 Pl. UI f. 7 (1857). 



Marine: North Sea! Mediterranean Sea! Red Sea! Madagascar! China! Japan! Sumatra! 

 Australia! Samoa! Galapagos Islands! Honduras (Jan. Rabh.). Brazil! Florida! New York! Fossil: 

 Baltchik! 



Var. dilatata A. S. (1874). — V. elliptical, rostrate. L. 0,08; B. 0,044. Lateral areas 

 slightly convergent. Strise 11, puncta about 14 in 0, 01 mm. — Atl. II f. 26. 



Marine: Gulf of Mexico (Atl.). 



Var. denudata Grun. Ms. — V. elliptic-lanceolate. L. 0,i ; B. 0,04.'-) to 0, 05 mm. Lateral 

 areas as in the var. Ehrenhergii, but dilated as they reach the margins of the valve. Striee. 10, 

 puncta 17 in 0, 01 mm. 



Marine: S:ta Monica, Calif. fossil! 



Var. atlantica A. S. (1874). — V. elliptical, with parallel margins and cuneate ends. L. O, o o 

 to 0,1; B. 0,026 to 0,032 mm. Lateral areas not reaching to the margins of the valve. Strise 9 

 to 11 in 0,01 mm. Puncta very close. — N. S. D. I f. 34. Atl. II f. 33? N. Couperi Atl. II 

 f. 12? N. Lyra dilatata perpusilla Pant. I p. 27 Pl. XVII f. 150. N. Lyra var. Miptira A. S. 

 N. S. D. Pl. I f 35, 38. 



Marine: North Sea! Hnngary, fossil (Pant.). 



This var. graduates into i\'^. conncr.tonfi Grun. 



