M\\\ DIATOMS OF THE A.LBATROSS VOYAGES. 239 



seems to me u r I. This figure of Schmidt's is practically identical with an earlier 



one" there marked "fraglich." There is also - e resemblance, especially in the 



striation of the border, to [felosira imperfecta Herib.6 The above nan to the 



resemblance of this species to some of the disciform Medusae. 



Type in the U. S. National Museum, No. 59011J, from station 3346, off Washington, 

 September 22, L890; 786 fathoms, bo1 i of green mud. 



Melosira i sulcata var.?) scopos Mann, Bp. nov. I'i \m I., figi re I. 



Valve circular, convex; the center marked with a beaded circle one-fifth the \ i] 

 diameter, the beads sel wide aparl in regular quadrate order; surrounding this a i 

 ring extending to one-fifth the radius from the border and separated from this by a 

 narrow hyaline band; border narrow, massive, ornamented \\ ii li a double row of alter- 

 nating beads; diameter of valve, 0.07 nun. 



The form most nearly resembling this species is an unnamed figure of Schmidt's, < 

 which, with the above, mighl be classed as very wide varieties of \felosira sulcata 

 (Ehrenb.) Kiitz. But such an identification would be altogether unsatisfactory. M . 

 species also shows a slight likeness to Cyclotella umbilicata i Ehrenb.) Ralfs, as figured 

 (Discoplea umbilicata Ehrenb.) bj Ehrenberg;d but, as Ralfs says, < though repr< 

 Bented in Ehrenberg's figure with a punctate center thai diatom has a smooth central 

 umbo, and ii is so described by Ehrenberg. ' Ehrenberg's Bpecies is probably identical 

 with Melosira westii W. Smith. 9 



Type in the U. S. National Museum, No. 5901 L8, from station .".TUMI. Okhots] 

 September I, L896; 1.711 fathoms, bottom of green sand and fine mud. 



Melosira sol (Ehrenb.) Kutz. Sp. Alg. 31. L849. Pritch. His1 [nfus. ed. l. 819. L861. 

 Van Beur. Synop. pi 91. f. : 9. L881. Schmidt, Atlas pi. 179. f. 11. L892. De 

 Toni, Syll. Alg. 2: L341. L894. Wolle, Dial. X. A. pi 58. f. i 2. L890. Truan & 

 Witt, Dial . Hayii. 17. pi ', . J. IS. 1888. Castr. Rep. Voy. 'hall. Bot. 2: 93. pi 



■ to.f.s, pi /;../■..;. pi 21. f. ;. L886. 

 Gallionella sol Ehrenb. Ber. Akad. Wiss. Berl. 1844: 202. IM.V: Mikrog. pi 35A. 



XXII. f. it. L854. 

 Gallionella oculus Ehrenb. Ber. Akad. Wiss. Berl. 1844: 202. L845. 

 Melosira oculus Kiitx. Sp. Alg. 31. L849. Pritch. Hist. [nfus. ed. 1. 819. L861. 

 Cyclotella radiata Bright. Quart. Journ. Micr. Sci. 8: !)ii. />!. S.f. 1 1. L860 

 Melosira radiata Grun. in Fenzl, Reise Novara Bot. 1: 27. 1^70. 

 Melosvra(sol\ar.'?)polarisGTUii. Denkschr. Akad. Wien48 2 : 95. pi 5. f. 33. L884. 

 Found at station 2844, off Alaska. 



Melosira sulcata i Ehrenb.) kin/. Bacill. 55. />/. .'./. 7. L844. Rabh. I'd. Inn-. Alg. 1: 

 42. [864. Schmidt, Atlas/./. 177. f. 23 39. L892. Wolle, Dial. N. A. pi - 

 /.;. Truan & Witt. Dial. Hayii. 17. pi ;. /'. 19. 20. L888. Van II. Mir. Synop. />l. 

 91. f, 16 is. 22 !'(. 1881. Pritch. Hist. [nfus. ed. I. ^1!'. pi. •>./. 131, pi. //. /. 26. 

 Jan. Abh. Schles. Ges. Vaterl. Cult. 1862-': i0.pl tA. f. 22. 1862. II. I.. Smith. 

 Sp. Diat. Typ. no. 233. L874. 

 Gallionella sulcata Ehrenb. Ber. Akad. Wiss. Berl. 1837: id. L838; [nfus. 170. pi 21. 

 f. 5. [838; Phys. Abh. Akad. Wiss. Berl. 1839: 171. pi 3. /. 5a e. L.841; 1841: 

 437. pi i. I. ./'. /;. L843; Mikrog. pi 18. f. la c, pi 20. II. f. 27, pi 25 A. X VII. 

 J. 11 l .'. L854. 



Schmidt, Atlas, pi 176. f. 23. L892 

 &Herib. Dial. Auverg. i'.i' pi 10. f. 31. L893. 

 '•Schmidt. Atlas pi 176. f. 21. L892. 

 -/ Ehrenb. Mikrog. pi S5B.J. 9. L854. 

 ' Pritch. Bist. [nfus. ed. 1. 81 I. L861. 

 / Ber. Akad. Wiss. Berl. 1854: l':; 1 * L8 

 <j\\. Smith. Synop. Brit. Diat. 2: 59. pi 52. f. 33. L856. 



