'_\>h CONTRIBUTIONS PROM Mil. NATIONAL HERBARIUM. 



Coscinodiscus obscurua Schmidt, A i la- pi. SI. f. U - - Grun Denkacnr. 



Akad. W W s : 74 L884 Rati Proc. Roj Soc Edinb 16: 513. I-- 1 ' I >■ 

 ,i. Syll. Ug. 2: ijii i- 1 



. • Heur. S\ nop. pi. / KJ i s M 



The genera] cell Btructure of my specimens agrees well with the above, and the 

 cltaracterisl ic minute beads al the inner ends of the Bemiradial Lines are \ ery evident. 

 They do not appear in the somewhal doubtful photograph of ilii- diatom by D 



\V I ward." The specimen from Sendai, Japan, called \<\ Brun C. obscurus Jlo 



can hardly be i lassed here; the fine beaded secondary markings in the hexagons and 

 ilif absence of a striated border mark them as distinct. Bran's form is, except for the 

 er marking, nearer to C. Jloridulus Schmidt, which, Like the above, has minute 

 beads al the terminations of the semiradia] Lines. 



Found al station 2844, south of Alaska. 



Coscinodiscus oculus-iridis Ehrenb. PhyB. Abh. Akad.Wiss. Berl. 1839: 117. L841; 

 Mikrog. pi. J8.f. :.'. pi 19. f. : L854. Jan. Abh. Schles. Ges. Vaterl. Cult. 1862 s ; 

 :;. pi. ill. f. 6, pi .'A./. .. L862. Schmidt, Atlas pi no nam.- . 6 9. L878; 



pi li.:. f. i. 3 5, :<>. L888. Gran. Denkschr. Akad. Wien 48 : 77. L884. Jan. 

 Dial. Gaz. Exped. pi .'../". :. Cleved Moll, type uo. 3, 7.7. L62, 215, 258, 259 

 319. Kan. Proc. Roy. Soc. Edinb. 16: 559. L889. Pritch. Bist. Lnfus. ed. I 

 L861. De Toni, Syll. Alg. 2: L275. L894. 



entralis Ehrenb. Mikrog. pi .'/./../. II. L.Smith, Sp. Diat.Typ.no. 

 91 (nol uo. 92 . L874. 



Rat tray unites with the above lisl C. omphalanthus Grun., c C. asU romphalus Ehrenb., d 

 and Cestodiscus raduttus Ehrenb.* I do nol think these can be classed here, [also 

 Look "ii Rattray's C. oculus-iridis loculifera ' as of doubtful worth. 



Found al Btations 2929, 3604, 1530H, off southern California and Bering Sea. 



Coscinodiscus pentas Ehrenb. Maim. 

 Symbolophora pentas Ehrenb. Ber. Akad. Wiss. Berl. 1844: 205. L845; Mikrog. pi 

 I. XXII. / 19. 1854. Griff. & Benf . Micr. Diet. ed. 3. pi 1875 



Ehrenb. Phys. Abh. Akad. Wiss. Berl. 1872: 283. pi 12. III'. 1. 1873. 

 Symbolophora microtrias Ehrenb. Ber. Akad. Wiss. Berl. 1844: 205. 1845; Mikrog. 

 pi S5A, 11. / 16. 1854. Pritch. Bist. lnfus. ed. I. 833. 1861. Griff. <ft Benf. 

 Micr. Diet. ed. 3. pi ..../. 55. 1875. 

 Symbolophora tetras Ehrenb. Ber. Akad. Wiss. Berl. 1844: 205. 1845. Ehrenb. 



Phys. Abh. Akad. Wiss. Berl. 1872: 394. pi 12. 11./. I. 1873. 

 Symbolophora hexas Ehrenb. Ber. Akad. Wiss. Berl. 1844: 205. L845.0 



stellari* Eloper, Quart. Journ. Micr. Sci. 6: lM. />/. .;./'. ... 1858. Moeb. 

 Diat.-taf. pi 13. / 3. Pritch. Bist. Lnfus. ed. 4.828. pl.5.f.8S. L861. Castr. 

 Rep. Voy. Chall. Bot. 2: L55, 158. pi 3./ .'. pi ■',./. 9. Grove; Schmidt, Atlas 



a Van Beur. Synop. pi 129. f. .. 1881. 



bMem. Soc. Phys. el Bist. Nat. Geneva SI 1 : 23. pi 20./. .'. L891. 



• S.-liinidi. Atlas pi 63./ :. L878. 



d Schmidt, Atlas pi 60./ 7. 1878 and Gran. Denkschr. Akad. Wien 48 : 77 L8J 



t Van Beur. Synop. pi 129./ 5. L881. 



' Proc. Roy. Soc. Edinb. 16: pi /./. .'. I- 



Symbolophora microtetras Ehrenb., . s '. micropentas Ehrenb., and S. microhexas 

 Ehrenb. Monatsber. Akad. Wiss. Berl. 1855: 302. 1856, are all nomina nuda. 6 

 UaHs Ehrenb. Ber. Akad. Wiss. Berl. 1844: 88. 1845 Pritch. Bist. Lnfus. ed. i. 

 B33. pi hi 36. 1861. Griff. & Benf. Micr. Diet. ed. 3. pi 19./ 6. 1875. Am. Journ. 

 Sci. 48: pi ,.j. i. L845 ifi here excluded, as ii is an Actinoptychus. 



