OF THE NAVICrLE^E. 



907 



N. distiuts (S.). — Lanceolate, with 

 subacute apices ; costas radiant, distant, 

 10 in -001", not reaching the median 

 line. = Pi)im(laria distans, SD. i. p. 56, 

 pi. 18. f. 1G9. Marine. Conmion, espe- 

 cially from deep dredgings. Costi© 

 shorter opposite the central nodide. 



N. elegans (S.J. — Broadly or elliptic 

 lanceolate, with slightly acuminated 

 ends; strise distinct, 24 in -001", waved, 

 radiate, nearly reaching the median line, 

 sliorter opposite the central nodule. 

 SD. i. p. 49, pi. 16. f. 137. Marine. 

 England. 



N. jjermctf/na (Bai.). — Large, turgid- 

 lanceolate, with obtuse apices, a mar- 

 ginal baud of pimctated striae, and a 

 broad, lanceolate, longitudinal median 

 blank space ; nodido indefinite. = P/«/»^- 

 fariapermarpm, BMO. p. 40, pi. 2. f. 28 & 

 '38. Luited States. 



II. Valves linear or ohlong, neither 

 rostrate nor constricted. 



t Ends scarcely cuneate. 



N. BaciUum (E.j. — Linear, with trun- 

 cate, romided ends ; strias indistinct, 54 

 in -001". EM. several figures. = iV". hacil- 

 laris, Greg. ML iv. pi. 1. f. 24. Ehren- 

 berg gives about 50 habitats in Em-ope, 

 Asia, Australia, Africa, and America. 



N. borealis (E., K.). — Small, stiiated, 

 linear, with slightly attenuated, rounded 

 apices ; strine stout, rather distant, not 

 reaching the median line, 13 in -001". 

 KB. p. 96, pi. 28. f. 68-72. = Pinmdaria 

 hurealis, EM. numerous figures; Pinnu- 

 laria latestriata, Greg. MJ. ii. pi. 4. f. 13. 

 (VII. 74.) A very common and widely 

 diliused species. Ehrenberg gives about 

 200 habitats for it. (3 longer and more 

 dilated at the middle, = Pinmdaria 

 Caraccana, E. Under moss on trees. 

 The front "view of this species is linear, 

 with truncated ends and striated mar- 

 gins, and resembles that of detached 

 frustides of DeuticrJa and Odontidium. 



N. Chilensis (E., K.). — Large, linear, 

 with broadly rounded apices, and 11 or 

 12 stout costie in 1-1200". KA. p. 79. = 

 Pinmdaria CMensis, EM. pi. 34. 11. f. 3. 

 Australia, Asia, Africa, America, (xii. 

 33.) Costre parallel, equal. Approaches 

 to N. riridis, but is shorter and broader. 



N. rcctamjidata (Greg.). — Linear, with 

 truncate rounded ends ; costae rather di- 

 stant, 22 in -001", nearly reaching the 

 median line, except opposite the dilated 

 indefinite nodide, and there shorter and 

 diverging. GDC. p. 7, pi. 1. f. 7. Marine. 

 Scotland. 



N. Iridis (E.). — Large, elongated, 

 linear-oblong, tapering into the obtuse 

 apices, finely striated both longitudinally 

 and transversely, iridescent. EA. p. 130, 

 pi. 4. 1. f. 2. New York. 



N. oblonga (K,). — Elongated, slender, 

 oblong or linear- oblong, with rounded 

 apices ; costae stout, connivent at the 

 centre. KB. p. 97, pi. 4. f. 21. =Pinmi- 

 laria iJohjjitera, EA. p. 133 ; P. macHenta, 

 E. Common. We follow Kiitzing and 

 Smith in referring P. macilcnta, E., to 

 this species ; Ehrenberg's figures, how- 

 ever, differ from theirs in being more 

 linear, with less tapering apices. 1-140". 



N. Orecjonica (E,, K.). — Elongated, 

 bacillar, uniformly and gradually de- 

 creasing towards the rounded apices; 

 pinnules stout, 23 in 1-11.52". KA. 

 p. 7\.=Pinnidaria Oregonica, EB. 1845, 

 p. 79. Fossil. Oregon. 1-228". It 

 approaches to N. Digitus, but is more 

 slender. 



N. truncata (K.). — Minute, smooth, 

 linear, with tnmcato-rounded ends, and 

 an inner marginal border twice con- 

 stricted ; front view broadly linear, 

 truncate. KB. p. 96, pi. 3. f. 34. Eu- 

 rope. 



N. Liher (S.). — Linear-oblong, with 

 rounded apices, and 48 delicate striae in 

 •001" ; colour of drv valve purplish. 

 SD. i. p. 48, pi. 16.*^ f. 133. Marine. 

 Sussex. 



N. Stylm (E.). — Elongated, narrow- 

 linear, with rounded ends, and having 

 longitudinal dotted lines on each side. 

 EM. pi. 15 A. f. 36. Asia ; Lough Momiie 

 deposit. 



N. Ergadensis (Greg.). — Rather small, 

 narrowly linear-oblong, vnth. roimded 

 ends ; costae distinct, 25 in -001", nearly 

 reaching the median line, shorter and 

 radiant opposite the roundish, smooth 

 umbilical ^^^cq.-= Pinmdaria JErqadensiSf 

 TM^ iv. p. 48, pi. 5. f. 22. Scotland. 



N. styliformis =■ Pinmdaria styliformis, 

 EM. pi. 38 A. 17. f. 6. Australia, Africa, 

 America. Ehrenberg's figure represents 

 a portion of an elongated, naiTow, strictly 

 linear valve, with rhomboid ends, and fine, 

 parallel striae whicli reach the median 

 line. 



N. Dactglus (E., K.). — Large, elon- 

 gated, linear-oblong, passing by a very 

 gentle curve into the slightly narrower, 

 broadlv roimded apices ; pinnules 14 in 

 1-1200". KB. p. 98, pi. 28. f. 59.= 

 Pinmdaria Dactglus, EA. p. 132, pi. 4. 1. 

 f. 3. Europe, Asia, Africa, iimerica. 



Lough Mourne deposit. 

 N. viridis (Nitzsch, K.).- 



-Elongated, 



