MA2CN DIATOMS OF THE ALBATEOSS VOYAGES. 295 



inconstant. Tlumgh the union of sciilptiun and pimdatum is desirable, tlu^ former 

 name should 1)C preferred to the latter, which De Toni selects. IL is probable T. reti- 

 culum Bright, belongs here, though the miHeralde figure and inconiploLe description 

 make this a little uncertain. But thiw is not T. rcilndumYAivi^wh.ii De Toni quotes 

 BrightweH's name but does not i(h^ntily it with Elin^nberg. T. browneanum Grev.t' 

 which Boyer adds to the above list, is not at all tlie same. Grevillo says of it 'Singles 

 rounded with t>1)scure pseudono(hdes.'' These la.st can not possibly bo the rings of 

 Shadbolt's form, those being at the center, but nmst be processes at the apices. The 

 center of Greville's figure k clearly drawn an<l without trace of the rings of T. scidplum. 

 I think Schmidt's plate 79, figures 14 and 16, belong here, a pentagonal specimen from 

 Station 2920H being almost identical with figur(; 14 as well as with Van Ileurck's 

 Synopsis, plate 109, figure G, 



Found at staticms 2920II, 3513, 3526, 3611, 300411, 3698, 3712H, Hawaiian Islands, 

 Honshu Island, Japan, and Okhotsk Sea. 



Trigoniura striolatuna (Ehrenl).) ^Mann. 



. Tnccratium striolatum Ehrenb. Phys. Abh. Akad. Wiss, Berl. 1839: 159. pi 4./. 9. 



1841. Bright. Quart. Journ. Micr. Sci. n. s. 1: 250. pi -If. 10, 1853. Moeb. 



Diat.-taf. pi /./. 10. 1890 De Toni, Syll. Alg. 2: 943. 1S94. (not Roper, Trans. 



Micr. Soc. L(md. n. s. 2: 74. pi 6./. S. 1854.) 



Iloper is right c in claiming that his idea of this diatom of Ehrenberg and Brightwell's 

 idea are not the same. A comparison of the original figure an<l a reading of Ehren- 

 beig's diagnosis will show that Brigbtwell is corr(Ht. There is neither mention nor 

 sign in the figures of any horn-like processes in Ehrenberg's species. At any rate the 

 specimens found by me are wholly destitute of such processes, though the apices are 

 produced; and as they agree perfectly with what is given in Ehreuberg, Kiitzing, and 

 Brightwell, I look upon them as well marked and distinct from Roper's form. To 

 unite all these with Biddidphia rhombus (Ehrenb.) W. Smith, as is done by Van Ileurck^ 

 is out of the question. Roper's form is probably the same as T. membranaceum Bright. ^ 



Found at station 330111, Bering Sea, 



Trigordum tabellariuni (^Bright.) Mann, 



Triceraiium tabellarium Bright. Quart. Journ, Micr. Sci. 4: 275. pi 17. f. 15. 1850. 

 Moeb. Diat.-taf. pi .9,/ 15. 1890. Schmidt, Atlas pi 77./. 1-2 (/. 3-5 according 

 to Grun.). 1882. Jan. Diat. Gaz. Exped. pi 9.f. 7. De Toni, SyB. Alg. 2: 953^^ 



1894. Pritch. Hist. Infus. ed. 4. 854. Clove, Bill. Sv. Vet. Akad. Hand!. 5^; 17. 

 pi 5./. 31. 1878. 



Triceraiium johnsoni Ralfs in Pritch. Hist. Infus. ed. 4. 854. 1801 '\ 

 Triceratiumreyudosum Grev. Trans. Micr. Soc. Lond. n. s. 12: 90. pi 15. J. Jl. J 804. 



Moeb. Diat.-taf. pi 61. f. 21. 1890. Schmidt, Atlas pi 77. f. (hi), 1882: pi 127, f, 



5. 18S8 ^not Gr. t& St. Journ. Quek. Micr, Olul) H. 2: 327. pi Iff,/. 15-16. 1880). 

 Triceraiium pallidum Grev. Trans. Micr. Soc. bond. n. s. 12: 81. pi IJ . f. 7, 1804. 



Moeb. Diat.-taf. pi 59 J. 7. 1890. De Toni, Syll. Alg. 2: 938. 1894. 

 Triceraiium hrevincrvum Grey. Tran?. Micr. See. Lond. n. s. 13: 101. pj. 9.J\ 2(L 



1865. Moel). Diat.-taf. pi GO. J, 2G. 1890. 



.aCf. Ber. Akad. Wiss. Berl. 1844: 38. 1845; Mikrog. pi 18. f. 50. pi 3S. XVI.f 13 

 1854. 



i> Trans. Micr. Soc. Lond. n. s. 9: 72. pi 8./. IG. 1801. 

 c Trans. Micr. Soc. Lond. 2: 74. 1854. 

 dVan Ileur. Synop. pi 99, f. 1-3, 1881. 



^ Quart. Journ. :\ficr. Sci. 1: 251. pi 4-f^ 15. 1853, and cf. with BrightwelFs figure 

 of this species on the same plate. 



31713— VOL 10, TT 5—07 6 



