356 CONTRIBUTIONS FROM Mil NATIONAL 1 1 l.i: i: \ i;i 1 \i . 



valve corresponded exactly to hie figure and the other showed the sun-like raya around 

 the center, referred to in the - ame. I find a minute error in focusing intern- 



which must !"• the method by which such great!; 



ie ili.ii by < t'Meara u-t.- obtained. 

 I and at stations :;».".'. 361 1 



Mann, sp. no> Pi w\ I.TT. noi - 



Valve deepl} constricted at the middle; the two halves broadest just beyond this 

 constriction; thence narrowing rapidly to the blunt, rounded apices; striae monil- 

 iform, except at the constriction, where they an- fused into three ridges; beads large, 

 oval, tli-- marginal onee double the length of the others; Btriae toward the middle of 

 tin- valve oblique t-. tin- raphe, but not curved, toward tli" apices becoming curved; 

 a single row of 1. - od either side oi the mediaD line; ends ol the raphe at the 



center separated by a -mall hyaline round area, the central nodule. 



5th of valve, 0.12 mm.; width of valve, 0.045 mm., and at the middle, 0.012 mm. 

 Type In the U.S. National Mi seum, No. 590 l •"><>. from Btat ion 2807, Galapagoa [stands, 

 April l. i s ^ s . 812 fathoms, bottom of Globigerina "../.• and coral mud. 



Naviculaspectabilis Greg. Trans. Roy.Soc. Edinb. 21:481.pZ. 9.f. to. l^">7 . Rabh. 

 I'l. Eur. Alg. 1: 17s. L864. Schmidt, Atlas pi l.f.31, pi ■;./. 10 11, r>. I^T.Y 

 Donk. Brit. Diat. 12. pi .-./. 5. 1^71 ::;. Cleve, Sv. Vet. Aka<l Han.ll. 27 : 

 L895. Castr. Rep. Voy. (hall. Bot. 2:32. pi 18. f. ". L886 DeToni, Syll. Alg. 

 2: us. iv. i. Pritch. Bist. [nfus. ed. 4. 9 O'Meara, Pi >c, Roy. Irish 



Acad. II. 2:390. L875. Van II. ur. Treat. Diat. 202. pi VI. J. 757. L896 uot N. 

 spectabilis Grun. Verh. Zool. Bot. Ges. Wien 10: 533. pi i:f. n. L8( 



ata Grev. variety; Schmidt, Atlas pi 3./. It 15. i s 7"> not N. excavata 

 Grev.). .Ian. Diat. <.a/.. Exped. pi 15. f. :.'. Cleve, Sv. Vet. Akad. Han. 11. 18 : 

 8. pi ! 1881 (not Schmidt, Atlas pi 70. f. \6. 1881, according to Grun.). 



Navicula mikado Pant. Beitr. Bacill. Qng. 3: /-/. /.;./. 334. ' v '- ,:; - 

 Although tli«' figures above cited of .V. < cooi <//</ Grev. variety are clearly synonyms 

 of this species, I <1<> not think the original form of Greville's diatom," nor the figure so 

 named by Grunow, 6 can Bafely be looked upon as the same. Beyond question .Y. 

 o'sutilt/ii Jan.< is tin- same as Greville's species, as Grunow points out. 6 But when 

 we compare any of these figures of N. i ccai ata which at-.- in harmony with the original 

 with tli<' type of N. spegtabilu as given by < tregory or in the superb figure by Donkin, 

 it is plainly too wide a Btretch to cover both forms by one specific nam.'. As Cleve 

 Bays, tin- -p< cies merges toward N. lyra Ehrenb., on the one hand, and N. h nnedyi W. 

 Smith, ->!i tli" other; but if it is to be a Bpecies at all and have any boundaries, it « an 

 ii.it include Greville's diatom. Nor is Cleve correct in adding to the above synonymy 

 N. hn Hutu Norm.d and .V. rnit ran i Pant .' If we wish to see the result of this over con- 

 densation .mi the part of Cleve, we '-an not do better than compare figures 16 and 52 in 

 plat.- 70of Schmidt's Atlas, both of which he ranges under N. spectabilis. Such a 

 "species" is oul of all bounds and not worth retaining. 



Found at Btations 2807, 2920H, Galapagos and Hawaiian islands. 



Navicula splendida(iie^. Trans. Micr. Soc. Lond. n. b. 4: 1 1. ///. 5./. l ,. \<^. Pritch. 

 Bist. lnfus. ed. L 893. Schmidt, Jahresb. Komm. Deut. Meere2:86. pi. l.f, 

 pl.g.f.2. 1874; Atlas pl.lS.J. 31 34- L875;pZ.< -I. Van. Heur. Synop. 



oTrans. Micr. Soc. Lond. n. b. 14: L30. j>l. tt.f. 15. L866. 

 b Schmidt, Atlas pi ;>>./'. .;<,. L881. 



nmidt, Atlas />/. :<>./. ;<>. L881. Jan. Diat. Gaz. Exped. pi 15. f. 11. Pant. 

 Beitr. Bacill. Qng. 2: 52. pi 15. f. 370. L889. 



-II. Rep. Voy. (hall. Bot. 2: 29. />/. 18. f. W. 1886. Schmidt, Atlas pi 70./. 

 1881. 

 - Pant. Beitr. Bacill. Ung. 2: :>_'. pi 30. j 



