OF THE XAVICTJLEJE. 



895 



N. Monile (E., K.). — Striated, linear, 

 constricted, with five, nearly equal sub- 

 globose nodes, including the capitate 

 ends. = Pi/mularia 3Iomle, EM. pi. 17. 1. 

 f. 12 ; Pinnularia isocepluda, E5I. pi. 5. 

 3. f. 21. Berlin, America. It has the 

 ends more capitate and the striae stronger 

 than N. nodosa. 



N. Kochii (E., K.). — Large, elongated, 

 lanceolate, with subacute apices, each 

 side with three imdidations, the middle 

 one most distinct; striae oblique j the 

 median smooth band very broad, extend- 

 ing to the apices. KA. p. 84. = Pinnu- 

 laria Kochii, EB. 1845, p. 364. Fossil. 

 Kurdistan. 



N. Pyrencdca (S.). — Elongated, slen- 

 der linear, with three intiations, the 

 median one greatest ; strise indistinct. 

 ANH. 1857, xix. p. 8, pi. 2. f. 5. Pyre- 

 nees. 



N. undosa (E.). — Small, smooth, 

 broadly oblong-lanceolate, with three 

 undulations on each side, and conical 

 apices. EM. pi. 39. 3. f. 90. America, 

 Africa, Asia, France. Ehrenberg de- 

 scribes it as akin to N. Hitchcockii. 

 Rabenhorst remarks that it resembles N. 

 Persica in form, but is scarcely one-third 

 its size and has no secondary undulating 

 ribs. 



N. Persica (Rab.). — Large, oblong- 

 lanceolate, with obtuse mammiform 

 apices ; each side with five undulations, 

 and four corresponding longitudinal un- 

 dulated lines on each side the median 

 one. Eab D. p. 41, pi. 6. f. 65. South 

 Persia. Broadest at the centre, and 

 tapering in a pjncamidal manner to each 

 apex. 



N. Integra (S.). — Small, lanceolate, 

 with slightly undulated margins and 

 contracted apicidate apices; striae in- 

 distinct, 36 in -001", reaching the median 

 line and most evident opposite the cen- 

 tral nodule. = Pm«?^/arm integra, SD, ii. 

 p. 96 ; N. rostrata, MJ. iv. pi. 1. f. 14. 

 Britain. 



N. undtdata. = Pinmdaria mesotyla, 

 EM. pi. 16. 3. f. 27. Sweden, India. 

 Ehrenberg's figau^e somewhat resembles 

 that of N. undosa in form, but is longer 

 and has parallel transverse striae. 



C. Valves elongated linear or lanceolate, 

 loith gihhous or injlated centre ; central 

 costcs, ivhen present, usually converging, 

 and often leaving a dilated sunooth space 

 round the median nodule. 



N. mesotyla (E.). — Small, smooth or 

 indistinctly striated, narrowly linear, 

 with a central spherical inflation and 



slightly contracted obtuse apices. EA. 

 p. 131, pi. 4. 2. f. 7. ; EM. pi. 1. 3. f. 14. 

 Asia, Africa, America. 1-420". 



N. inconspicua (Greg.). — Small,smooth, 

 hj^aline, linear, with roimded ends and 

 slightly gibbous centre; median line 

 strong, complex, interrupted by the de- 

 finite central nodule. GD. p. 6, pi. 1. f. 

 3. Scotland. 



N. IcBvissima (K.). — Minute, vitreous, 

 clear, linear, with broadly rounded ends 

 and slightly gibbous centre ; striae want- 

 ing or indistinct ; central nodule stauros- 

 like. KB. p. 96, pi. 21. f. 14. = Staw ^ 

 roneis rectangidaris^ MJ. ii. pi. 4. f. 17 

 (according to Smith). Fossil, Santa 

 Fiore; recent, Britain. 1-570". 



N. tmnidula (Rab.). — Small, linear, 

 with rounded, slightly enlarged ends, and 

 inflated centre ; central nodule stout. 

 RabD. p. 41, pi. 5. f. 9. Stockholm. 

 Closely allied to N. Silicula. 



N. scopulorum (Breb.). — Elongated, 

 slender linear, with central and terminal 

 inflations ; striae very faint, reaching the 

 median line, 56 in -001". KA. p. 81. = 

 N. mesotyla, KB. p. 99, pi. 5. f. 3 ; Pin- 

 nularia Johnsonii, SD. i. pi. 19. f. 179. 

 In marine or brackish waters. France, 

 Britain. Front view turgid at the middle. 

 M. de Brebisson assures us that Smith's 

 species is identical with his N. scopu- 

 lorum; but Kiitzing's figiu-e and descrip- 

 tion would not lead us to infer the 

 identity. 



N, gibherula (K.). — Linear, with gib- 

 bous centre and very slightly enlarged, 

 obtuse, subtruncate apices ; striae very 

 fine. KB. p. 101, pi. 3. f. 50*. Em-ope. 



N. leptogongyla (E.). — Elongated, 

 slender linear, striated, tumid in the 

 middle ; apices slightly dilated, oblong, 

 obtuse. KB. p. 99, pi. 4. f. 9 ; EA. p. 

 130. = Pinmdaria leptogongyla, EM. 

 many figures. Em-ope, America. Lough 

 Moume deposit. Rabenhorst saj^s that 

 this species has double the breadth of 

 N. scojmlorum. 



N. mesogongyla (E., K.). — Styliform 

 or baciUar, striated, with gibbous middle, 

 and broadly rounded but not dilated 

 ends. KA. p. 81. = Pinnularia meso- 

 gongyla, EM. pi. 10. 2. f. 2. Asia, Africa, 

 America. Akin to N. nohilis, but with- 

 out dilated ends. 



N. nohilis (E., K.). — Very large, elon- 

 gated, broadly linear, gradually dilated 

 at centre, and broadly rounded ends ; 

 costae oblique, stout, close, not reaching 

 the median line. KA. p. 80. = Pin- 

 mdaria nohilis, EB. 1840, p. 20 ; SD. i. 

 pi. 17. f. 161. Em'ope, America, Asia, 



