32 p. T. CLEVE, SYNOPSIS OF THE NAVICULOID DIATOMS. - 



0,0 1 inm. — PImi. fortis Greg. T. M. S. IV p. 47 PI. V f. 19. .V. fortis Donk. B. D. ]). 57 PI. VITI 

 f. 8. A. S. Atl. XL VI f. 37 to 39. Finn, constrict a O'Meara M. J. VII p. 17 PI. V f. 8 (18(57). 

 Marine: Spitsbergen! Fiiimark! North Sea! Greenland! 



71. N. Formenterje Cl. (1881). — V. elHptic-laneeolate obtnse. L. 0,03 to O.o:?;; B. 0,013 

 to 0,0 If) mm. Axial area indistinct, ('entral area large qnadrate. Striii' (I in (),oi mm., radiate 

 thi'ongliout, coarsely lineate; lineoUie abont 24 in 0,01 mm. — N. Froviciitcrr/' Cl. X. R. J), p. 10 

 PI. IT f. 24. Icon. n. PI. I f. 33. A. S. Atl. XL VI f. 7 (witliont name). 



Marine: Balearic Islands! Campeachy Bay (Atl.). 



72. N. satlira A. S. (1876). — V. narrow elliptical, with rounded ends. L. n,(,7r, ; B. 0,021 

 mm. Axial area indistinct; central area large. Terminal nodules very distant from the ends. 

 Striae 5,:) in 0,oi mm. parallel, coarsely punctate. — Atl. XL VI f. 27. 



Marine: Cape of Good Hope (Atl.), Cape Horn (Petit). 



73. N. crucifera Grun. (1876). — V. broadly linear, with apiculate ends. L. 0,o.^) to 0,o-; 

 B. 0,0 17 to 0,0 19 mm. Axial area very narrow; central area large, (juadrate. Strise 5 to 6 in 

 0,01 mm., slightly radiate throughout, coarsely lineate; lineolte 22 in 0,01 mm. In the zonal view 

 the frustnle is (juadrate and has irregularly triangular terminal areas or blank spaces. - N. ro- 

 stellata A. S. N. S. D. PI. II f. 31 (1874). ^ N. cmcifcra Grun. A. S. Atl. XLVI f. 50—53 (1876). 

 N. apiculata car. niaculifh-u Grun. A. D. p. 37 (1880). N. bicuspidata Cl. a. Grun. N. R. D. p. 10 

 PI. II f. 25 (1881). 



Marine: North Sea! Baltic (Atl.), Naples! Sumatra (Deby Coll.)! 



This species is considered to be the same as K. apiculata BriSh. Diat. de Cherbourg 1859 f. 5 

 and Finn, ro.'itellata Greg. I), of Clyde PI. IX f. 20 (1857), but these figures shew no central area. 



74. N. Scoliopleura A. S. (1876). — V. linear, with apiculate ends. L. 0,o83; B. 0,oi67 

 mm. Median line .slightly flexuose, with distant terminal nodules. Axial area narrow, linear; 

 central area large, somewhat transver.se. Stri;« 7 in 0,oi mm., parallel thi'oughout (finely lineate?) 

 — Atl. XLVI f. 63. 



Marine: Campeachy Bay (Atl.). 



75. N. Solaris Greg. (1856). — V. lanceolate, obtuse. L. 0,o:i8 to 0,114 mm. Axial area 

 narrow; central area small, orbicular. Stria; 14 in 0,01 mm., strongly radiate throughout. — 

 T. M. S. IV p. 43 PI. V f. 10. 



Marine: Scotland (Greg.). 



This form is entirely unknown to me. To judge from the figure it has some resemblance 

 to N. hottnica, but if it be N. hottnirn, the fig. is very far from accurate. In A. S. Atl. XLVI 

 f. 16 is a form from New Providence named N. solaria? but the striation is much too coarse for 

 the N. Solaris of Greg. 



76. N. eentraster Cl. N. Sp. — V. convex, linear lanceolate, obtuse. L. 0,07 to 0,ii ; 

 B. 0,012 to 0,01.') mm. Axial area indistinct, or narrow and unilateral. (Central area large, 

 orbicular. Strise 7 to 8 in 0,oi mm. sti-ongly radiate in the middle, where they are more distant, 

 transverse at the ends, finely lineate; lineolffi about 30 in 0,oi mm. — PI. I f. 35. 



Marine: Japan! Madagascar! Auckland! 



This species resembles N. inflcxa Greg, but has more distant, and very finely lineate, strise. 



77. N. peniiata A. S. (1876). — V. linear-lanceolate, subacute. L. O.or.n to 0,095; B. 0,01 1 

 to 0,0 14 mm. Terminal fissures small, close to the ends of the valve. Axial area narrow or 

 indistinct; central area large, quadrate. Stritf 5 to 6 in 0,oi mm., radiate throughout, coarsely 

 lineate; lineolte 20 in 0,oi mm. — Atl. XL VIII f. 41, 42, 43. 



Marine: Morocco! Mediterranean Sea! Adriatic (Atl.), Hungary, fossil! Gulf of Mexico 

 (Atl.), West Indies! Pensacola, Florida! 



