810 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Navicula invenusta ^luniK wp. nov. Platk LIII, fku'uks C, 7, 



Vulv<M'1iii>tir'al, hroud. mas^^ivc; co^jtac puiKMiilo with ail(ml>l(' mw of alternating 

 minute l^eads; tlir inner ends of the cos^tae forming a straijjht linej^aralUd to the raphe; 

 iin irri'^ularly plaei'd row u[ large beads near the inner ends of the costae; sutures 

 between the coistae jnojc'cted inward^ with enlarged ends, the three on eitlier tside of 

 the hyalim^ eentral s])aee extending farther than the r(\st; asingU^ row of round l>eads 

 bonh'ring th<^ median Une, the latter terminating in a reetangulai' hyaline area at each 

 ap<'X. 



L(^ngth of valve, 0.11*0 to 0.1G5 mm.; width of valv(\ 0.010 to 0.()5(; mm. 



Tlie larger of tht^ two sptHimenri photogra[)h(Hl for the above (igin'(\s wa.s seleeted 

 because, bt^ng slightly tilted, it shows the two kinds of bt^ading previously mentioiied. 



Tyj)e in tlieU. S. National Museum, No. 590147, from station 2S07, (lalajiagos Islands, 

 April 4, 1888; 912 fathoms, bottom of Globigerina ooze and eoral nuul. 



Navicula irrorata Grev. Edinb. New Phil. Journ. n. s. 10: 27. pi. 4. f. 1. 1859. 

 Sehmidt, Atlas pL 2.f. /.9, 22^28, 1875. Ohn^e, Sv. V<'t. Akad. IIan(i]. 27': 5C. 

 1895; 26-: pi 4^ f- ^S. 1894. De Toni, Syll. Alg. 2: 100. 1801. Pant. Beitr. 

 Ikicill. Ung. 2: 40. pi. S, /. 147, 1889. Pri1(4i. Ilisl. Infus. ed. 4. 897. 1801. 

 Navicfda approximata Grev.; Grun. in Scliniidl, Atlas pd, 2.f. 20. 1875. 



Sueh varieties as Sehmidt's figure 19, eited above, sliow the transition of this species 

 into varieties of N. sculpta W. Smith. « 

 Found at station 2823, Gulf of California. 



Navicula lacrimans Sehmidt, Atlas pi, 12 J, d!)-6J. 1875. Panl. P>eitr. Ikuill. Ung. 2: 

 50. pi 2 J. IS. 18S9. DeToni, Syll. Alg. 2:70. 1891. 

 DipJt)iuis (ji'nuHulalaClt'Wj Sv. Vet. Akad. Ilandl. 26'': 101. IS'Jl, not Xai'wula yeni- 

 vudala Gi'Viu.] Schmidt, Atlas /jZ. IS. f.20~2l. 1875. 



Cleve's union of the first two of the three figurtvs ol" Schmidt, (^ited abovts with 

 Grunnw's Navicula ycvnnulida is not to be commended. First of all, Ihe llnec reiue- 

 8ent one speeii's; then,'fuither, they are widtdy different from N. (jnninnlaia Grun. 

 It may be added That his joining with these A^. fa^schrnbrrfjcri SvhuniU '' and X. bey- 

 Tichiana Selnnidt <' is equally l)ad. Later^ he held tlu^ last-named separate. 



Fotind at station 2807, Galapagos Islands. 



Navicula lata (^lireb.) W.Smith, Synop. Brit. Dial. 1: 55. 1853. Donk. Brit. Dial. 

 71. 1871-73. Sehum. Verh. Zool. Dot. Ges. Wien 17: 73. pi 4- /. 54. 18fi7. 



Grun, Verh. Zool. Bot. Ges. Wien 10: 515. 1800. Van Hour. Synop. 70. pi 6,f, 



1-2. 1881; Treat. Diat. 109. pi 2. J. 76*. 1890. De Toni, Syll. Al^^ 2: 18. 1891. 



Grun. Denksehr. Akad. Wien 48-: 98. pi U J. 14-17. 1881. Ilerib. Diat. Auvcrg. 



80. pi 4. /. 5. 1S93. H. L. Smith, Sp, Dial. Typ. no, 289. 1874, Priteh. Hist. 



Infus. ed. 4. 90S. ISGl, not Klitz. Baeill. 92./. 31. 1844 

 Fruatulia lata Breb. Consid. Diat. 18. 1838. 

 Pinnularia pnvh[}ple.ra Ehrenb. Phys. Abh. Akad. \\'iss. Berl. 1841: 421. pi 4- II. 



f.9. 18-13; Mikrog. pi 38A. XVII. J. 7 (not pi 35A. f, 11). 1854. Ral>h. Sussw. 



Diat. 45. pi 6'./. 11. 1853. Bail, in Fremont, R<^p. Expl. Exped. 1842-44. 302, 



pi 5./ iL 1845. 

 Navicvlo pachijptrra Klitz. Baeill. 98. pi 28. f. 58. 1844. Prileh. Hist. Infus. ed. 4. 



890. 1801. O'Meara, Proc. Roy. Irish Acad. 11.2: 342. pi JfLf. 5. 1875. Sehmidt, 



Atlas pi 45. f. 5-8, 1845. Pant. B(4tr. P.aeill. Ung. 3: pi 20. f. 302. 1893. 

 Pinnularia lata W. Smith, Synop. Brit. Diat. 1: 55. pi IS, f. 767. 1853. Rabh. 



Sussw. Dial. 42. 1853; Fl. Eur. Alg. 1: 212. 1801. Brun, Diat. Alp. 85. pi 8.f, 



25. 1880. Cleve, Sv. Vet. Akad. Ilandh 27^=: 81. 1895. 



"Van Ileur. Syn(»p. pi 12. f. 1. 1881. 

 £>0p. eit. pi 174./. 8-9. 

 ^•Op. cit. pi 69. f. 16-17. 



ci Journ. Quck. Micr. Club IL 2: 167. 1885. 



