.)|l) CONTRIBUTIONS FROM MM. RATIONAL HERBARIUM. 



Navicula invt'iiusiu M.mii sp. nov, l'i \ i i Mil riOURES < 



Valve elliptical, broad, massive; costae punctate with a double row of altern 

 minute beads; the inner ends of the costae forming a straight line parallel t" the raphe,; 

 an irregularly placed row of I . near the inner ends of the coetae; sutures 



between the coetae projected inward, with enlarged en Is, the three on either aide ■>!' 

 the hyaline central b] tiding farther than the rest; a single row of round beadi 



bordering ili«- median line, the latter terminating in a rectangular hyaline area at each 

 apex. 



_ih of valve, 0.120 to 0.165 mm.; width of valve, 0.040 to 056 mm. 

 The larger of the two specimens photographed for the above figures was -■' 

 because, being slightly tilted, it Bhows the two kinds of beading previously mentioned. 

 Type in the U. S. National Museum, No. 590147, from Btation2807,< ialapagoe Islands, 

 April I. l ss v 912 fathoms, bottom of Globigerina ooae and coral mud. 

 Navicula irrorata Grev. Bdinb. New I'lnl. Journ. n. b. 10: '_'7. /</. ;. /. / 



Schmidt, Atlas pi /../'. 19, :: tS. 1875. Cleve, 8v. Vet Akad. Bandl. 27 : 56. 

 1895; 26-': /»/. ;. /. 18. 1894. De Toni, Syll. Alg. 2: 100. 1891 Pant Beitr. 

 Bacill. In-. 2: 19. pi - 1889. Pritch. Bist. [nfus. ed. I B97. 1861 



\ icula appwxvmata Grev.; Grun. in Schmidt, Atlas pi. .'./. W. 18 

 Such varieties as Schmidt's figure 19, cited above, Bhow the transit ion of this species 

 into varieties of N. sculpta \\ . Smith. " . 



Found at Btation 2823, Gulf of California. 

 Navicula lacrimans Schmidt, Atlas pi. I .'./. 59 61. l s 7.">. Pant. Beitr. Bacill. Ung. 2: 

 50. pi .'../'. U L889. DeToni, Syll. Aig. 2:70. L891. 

 Diploneis gemmulata Cleve, Sv. Vet. Ucad. Bandl. 26 3 : 104. 1894, not Naviculagem- 



mulata Grun.; Schmidt, Atlas pi 13 /..'<> 21. 1875. 

 Cleve's union of the first two of the three figures of Schmidt, < i i • •* 1 above, with 

 Grunow'e Nai icula gemmulata is not t<> be commended. First of all, the three repre- 

 sent one species; then, further, they are widely different from N. gemmulata Grun. 

 Ii may be added that bis joining with these V. taschenbergeri Schmidt * and A bey- 

 richiana Schmidt < is equally bad. Later** he held the Last-named separate. 



Found at station 2807, Galapagos Islands. 

 Navicula lata (Breb. W.Smith, Synop. Brit. Dial. 1:55. L853. Donk. Brit. Diat. 

 71. L871-73. Schum. Verh. Zool. Bot. Ges. Wien 17: 7:;. />/. 1867. 



Grun. Verh. Zool. Bot. Ges. Wien 10: 515. I860. Van Beur. Synop. 76. pi <•./. 

 i .'. 1881; Treat. Diat. 169. pi .'../' 76. L896. De Toni, Syll. Alg. 2: 18. 1891. 

 Grun. Denkschr. Akad. Wien 48 2 : 98. pi 1./.14 17. L884. Berib. DUt.Auverg. 

 .. L893. II. I.. Smith, Sp. Dial. Typ. no. 289. L874. Pritch. Bisk 

 [nfus. ed. 4. 908. L861, nol Kutz. Bacill. 92./. 51. 1844 

 Frustulia lata Breb. Consid. Diat. L8. L838 



I',,,, tularin pachyptera Ehrenb. Phys. Abh. Akad. Wiss. Berl. 1841: 121. pi. \ II. 

 f.9. 1843; Mikrog. pl.S8A.XVIL f. : (not pi S5A. f. 17). 1854. Rabh. Sussw. 

 Diat. 15. pi 6./. n. L853. Bail, in Fremont, Rep. Expl. Exped. 1842 )l. 302. 

 /;/. :,./. 6. 1845. 

 Navicula i><irh„i>h ra Kin/. Bacill. 98. pi 18. f. 58. 1844. Pritch. Bist. Infus, ed. I. 

 . 1861. O'Meara, Proc. Roy. Irish Acad. II. 2: 342. pi SO./. ■',. 1875. Schmidt, 

 Atlas pi \5.f. 5 8. L845. Pant. Beitr. Bacill. Ung. 3: pi. 20. f. SOt. L£ 

 Pinnularia lata W. Smith, Synop. Brit. Dial. 1: •">•">. pi 18. f. 167. 1853. Rabh. 

 Sussw. Dial. 1l\ L853; Fl. Eur. Alg. 1: 212. 1864. Brun, Dial. Alp. 85. pi 

 L880. Cleve, Sv. Vet. Akad. Bandl. 27 : si. 1895. 



a Van Beur. Synop. pi 11. J. 1. 1881 



&Op. cit. /</. 174. f. 8 9. 



<()]». cit. />/. 69. f. 16 /:. 



d Journ. Quck. Mi<r. Club 1 1- 2: L67. L885. 



