KONGL. SV. VET. AKADEMIENS HANDLIN6AR. BAND 27. N:0 3. 63 



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

 Bail. Smiths Oontr. II p. 39 PI. II f. 33. 



Marine: Florida (Bail.). 



Var. Kittoniana A. S. (1874). — V. broadly lanceolate. L. 0,o7.5 to 0,i.t; B. 0,o4 to 0,o8 

 mm. Strise 7,5 to 10, puncta 10 to 15 in 0,oi mm. — N. Kittoniana A. S. Atl. II f. 10. 



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

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

 HeurckColi.)! Mauritius (Deby Coll.)! 



31. N. turgidula Pant. (1893). — V. broadly elliptical with rounded ends. L. 0,04 7; 

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

 13 in 0,01 mm. coarsely punctate. — Pant. Ill PI. XXXII f. 462. 



Marine : Hungary, fossil (Pant.). 



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

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

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



Var. elliptica A. S. (1874). — V. elliptical, with rounded to subrostrate ends, or subhexa- 

 gonal. L. 0,12 to 0,i8; B. 0,04 to 0,0 6 mm. Lateral areas linear, convergent towards the ends. 

 Striae 6 to 7, puncta 7 to 11 in 0,oi mm. — N. S. D. PI. 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! Madagsiscar! Seychelles (Van 

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



Forma bullata Norm. (1861). — L. 0,i3 to 0,i6; B. 0,o6 to 0,o7 mm. Areas with a row of 

 large puncta. Striae 6, puncta 11 in 0,oi mm. — JSf. bullata Norm. T. M. S. 1861 p. 8 PI. II f. 7. 

 A. S. Atl. Ill f. 8—9. 



Marine: Ceylon (Letourneur Coll.)! Macassar Straits (G-rove Coll.)! Japan (Atl.), Australia 

 (Norm.), Samoa (Atl.). 



Var. JEhrenbergii Cl. — V. elliptical, with rostrate ends. L. 0,05 to 0,i65; B. 0,o26 to 

 0,054 mm. Lateral areas constricted in the middle, with divergent ends. Striae 9 to 12, puncta 

 16 to 21 in 0,01 mm. — N. Lyra Ehb. Am. I: i f. 9 a. Greg. D. of Clyde PI. IX f. 13 b. 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- 

 goryam Grev. M. J. V. p. 10 PL III 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. O.os; B. 0,044. Lateral areas 

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



Marine: Gulf of Mexico (Atl.). 



Var. denudata Grun. Ms. — V. elliptic-lanceolate. L. 0,i; B. 0,o45 to 0,o5 mm. Lateral 

 areas as in the var. Ehrenbergii, but dilated as they reach the margins of the valve. Striae 10, 

 puncta 17 in 0,oi mm. 



Marine: S:ta Monica, Calif, fossil! 



Var. atlantica A. S. (1874). — V. elliptical, with parallel margins and cuneate ends. L. 0,o6 

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

 to ll^'in 0,0 1 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 rar. elliptica A. S. 

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



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



This var. graduates into N. connectens Grun. 



