904 



SYSTEMATIC HISTORY OF THE INFUSORIA. 



decussating, punctated striae. ILA.. p. 70. 

 = Pinnularia decusscda, EB. 1845, p. 364. 

 Marine. India. 



N. Indica (E.). — Rliomboid-lanceo- 

 late, with somewhat obtuse apices, a 

 small umbilicus, and thick- set, fine, lon- 

 gitudinal, pmictated lines (8 on each 

 side). EB. 1845, p. 363. Marine. India. 

 Somewhat resembles N. decussata. 



N. ? aspenda (E., K.). — Tm-gid, short, 

 rhomboid-lanceolate, six-angled, rough 

 with punctated stride ; umbilicus subor- 

 bicular; the longitudinal median space 

 much dilated near the umbilicus. KA. 

 •^. 71. = Pinmdaria? aspenda, EB. 1845, 

 p. 364. Marine. India. 



N. LiheUus (Greg.). — Rhomboid-lan- 

 ceolate, with obtuse ends; strias fine, 

 uniform, about 60 in -001", reaching the 

 median line ; front view broadly linear, 

 with the central portion longitudinally 

 lined. GDC.p.57,pl.6. f. 101. Scotland. 

 In form it much resembles N. rliom- 

 hica, but is more obtuse and broader, 

 with imiform striae. Professor Walker- 

 Arnott regards this species as escaped 

 frustules of Schizoiie?na Grevillii, — an opi- 

 nion, indeed, shared by Professor Gre- 

 goiy himself. 



N. suhtUis (Greg.). — Elongated, trans- 

 lucent, very slender, rhomboid-lanceo- 

 late, with a minute, definite nodule; 

 costse about 30 in -001", parallel, reach- 

 ing the median \mQ.=Pinmdana suhtilis, 

 GDC. p. 16, pi. 1. f. 19. Marine. Scot- 

 land. 



N. hmceolata (Ag., K.). — Minute, 

 narrow-lanceolate, with 44 indistinct, 

 parallel strict in -001". KB. p. 94, pi. 28. 

 f. 38 ; SD. i. p. 46, pi. 31. f. 272. Europe, 

 America. 



N. serians (K.). — Small, lanceolate, 

 with fine longitudinal lines, and subacute 

 apices ; front view broadly linear. KB. 

 p. 92, pi. 28. f. 43; SD. i. p. 47, pi. 16. 

 f. 130. = N. lineoJata, EM. several figures. 

 Em-ope, Asia, Australia, Africa, Ame- 

 rica. 1-288". Frustides frequently co- 

 hering. 



I^. Suhda (K.). — Elongated, slender, 

 narrow-lanceolate, with tapering, sub- 

 acute apices, and fine longitudinal lines. 

 KB. p. 91, pi. 30. f. 19. Marine. Europe. 



N. tenella (Breb.). — Minute, smooth, 

 very narrow - lanceolate, with acute 

 apices ; front view linear, slightly con- 

 stricted at the middle. KA.p. 74. Europe. 



N. atu2)hioxi/s (E.). — Elongated, nar- 

 row-lanceolate, with acute apices ; striae 

 indistinct or wanting. EA. pi. 1. 2. f. 8 ; 

 EM. many figures. Europe, Asia, Aus- 

 tralia, Africa, America, Lough Mourne 



deposit. More slender than N. gracUis. 

 Front view narrow-linear. 



N. Cari (E.). — Minute, smooth, lance- 

 olate, slender, acute at both sides, with a 

 circular median nodule. EI. p. 179 ; EM. 

 pi. 12. f. 20. FossiL Cassel. 1-1150". 



N. oxyplnjllum (K.). — Pellucid, glassy, 

 smooth, slender -lanceolate, gradually 

 taperino- to the acute apices ; median 

 nodule obsolete. KB. p. 92, pi. 30. f. 17. 

 Marine. Near Flinsbm-g. 



N. velox (K.). — Minute, smooth, 

 broadly or oblong lanceolate, with acute 

 apices. KB. p. 91, pi. 3. f. 66. = A: oh- 

 lou(ja, EA. pi. 3. 1. f. 14. Wangerooge, 

 Mexico. 



N. apoyuna (K.). — Minute, smooth, 

 slender-lanceolate, \A\h. acute, subros- 

 trate ends. KB. p. 91, pi. 4. f. 1. Eiu'ope. 

 Front view narrow-linear. 



N. Cesatii (Rab.). — Minute, smooth, 

 slender-lanceolate ; front view linear, 

 with rounded ends. Rab D. p. 39, pi. 6. 

 f. 89. Piedmont. Very like N. aj)oninay 

 but more slender in the lateral, and 

 broader in the front view. 



N. digito-radiata (Greg.). — Small, ob- 

 long-lanceolate, with obtuse ends ; striae 

 fine, distinct, about 25 in -001", reaching 

 the median line, those near the central 

 nodule more distinct and hioiily radiant. 

 = Pinnularia digito-radiata,^!^ . iv. p. 9, 

 pi. 1. f. 32. Scotland. 



N. Solaris (Greg.). — Elongated, nar- 

 row-lanceolate, with obtuse ends ; striae 

 fine, very distinct, 36 in '001", oblique, 

 radiant, and shorter opposite the inde- 

 finite central nodule. TM. iv. p. 43, 

 pi. 5. f. 10. Marine. Scotland. Colour 

 brown ; striae so highly radiant round 

 the central blank spot as to present the 

 appearance of a smi with rays. It is 

 longer than N. radiosa, with finer and 

 more inclined striae. 



N. Mediterranea (K.). — Minute, nar- 

 row-lanceolate, with obtuse apices and 

 20 striae in 1-1200"; fr-ont view strictly 

 linear, truncate. KB. p. 93, pi. 3. f. 17. 

 Marine. Em-ope. 1-1200". 



^.pundulata,^'M. pi. 15 a. f.34,B.f. 13, 

 14. Lough Mom-ne deposit, Sweden, 

 Africa. Ehrenberg figures this species 

 as rhomboid-lanceolate, with longitu- 

 dinal, parallel, dotted lines. 



N. appendiculata (Ag., K.). — Minute, 

 lanceolate, with slightly turgid middle 

 and subrostrate obtuse ends. KB. p. 93, 

 pi. 3. f. 2^.=Frustulia and Cymhella ap- 

 pendicidata, Ag. Europe. Front view 

 linear, with truncate ends. In the lateral 

 view the apices are somewhat produced, 

 but scarcely rostrate. 



