MWX DIATOMS OJ I III UL.BATROSS V'OYAi 331 



Cocconeis grevillei VV. Smith, Synop. Brit. Dial 1: 22 pi I - i\. II. 



Eur. Alg. 1: L02. L864. Jan Abh. Schl G I. Cult. 1862-': 18. pi. .1 



/. LO. L862. II. I.. Smith, Sp. Diat. Typ. im. 72. L874. Pritch. Hist. [nfus. ed. I. 

 L861. 

 Campyloneu g evillei Grun. err. dct. in Fenzl, Reise Novara Bot. 1: I" 

 .1. .mil. Roy. Mi«i. Soc. 1: 245. pi L878. Petit, Fonda de la Mer3: 



171. p/. .' /. ,. L877. Van Heur. Synop. L34. pi 18. j. 8 12. L881. De 1 

 Syll. Alg. 2: 439. L891 Grun. Verh. Zool. Bot. Ges. Wien 12: 130. 

 Campyloneis argus Grun. Verh. Zool. Bot. Ges. Wien 12: 129. pi. 10. 

 Fenzl, Reise Novara Bot 1: LO. 1870. Van Heur. Synop. L34. pi. -- ( 

 L881. De Toni, Syll. Alg. 2: 441. L891. Truan, Anal. Soc. Espan. Hist. ! 

 13: 363. pZ. lO.f. 23. L884 

 De Toni " Lri \"i •- Beparate rank to C. grevillei W. Smith, C. regalis Grev. and ( 

 Grun. under the generic head Campyloneis. Cleve, in above cil ition, unil •a the three 

 under Campylo W. Smith Grun., thus following Grunow'e analys 



I do uol think C. grei ilh i and I can be held separate. I >i fferencea i xist, but 



they an- Blighl and variable, having chiefly to do with the thickenings on the internal 

 craticular plates. Bui the union of GrevilL I talis with these is too radical. 

 A comparison of the published figurea does qoI Bhow the strong contrast that ia 

 seen in specimens of these two species. The craticular } >1.> i < -> and the inferior valves 

 are nev< r closely alike: but the widesl difference ia to be Been in the superior plates, 

 which in < . gn i UU i have beading actually or approximately alike in the middle and 

 outer portions, while( '. regah ? has an oval central area marked with bars of fine puncta, 

 while the outer area, separated from this central portion, is marked by very Large beads. 

 Two specimens afforded by II. L. Smith, types qo. 72 and no. 635, show this contrasl 

 finely, the former of C. gn i ill, i from Granville, France, and the latter of C. • galis from 

 Cape of Good Hope; I therefi >re take the position of Van Heurck, De Toni. and others 

 in classifying these species separately. 



Found al stations 2807, 3698, Galapagos Islands and Honshu Island, Japan. 

 Cocconeis pellucida Grun. in Rabh. Beitr. 1: 21. pi. 6. f. //. L862; in Fenzl, 

 Reise Novara Bot. 1: 12. 1870, not C. pellucida Grun. Verh. Zool. Bot. Ges. Wien 

 13: 145. pi. 13. f. 6. L863, which is C. pseudomarginata Greg. Schmidt. Atlas 

 pi 191. f. 48, pi 193. f. ■'• 3, pi. 194-f. '. 15, pi. 195. f. i 6. L894. Grun. in 

 Fenzl, Reise Novara Bot. 1: 98. pi. l.f. ' 3. 1-7". De T »ni, Syll. Alg. 2: 155. 

 L891. Cleve,Sv. Vet.Akad. Handl. 26-: 17s. L894. Pant. Beitr. Bacill. Cng.3: 

 pi 32. f. \65. L893. 



oneis ( in i- >>>' inda Temp. & Brun, Mem. Soc. Phys. el Hist. Nat . < reneva 30': 

 32. pi 8.f. 6. L889. Schmidt. Atlas pi 195. f. 10 19. L894. 

 Cocconeis lunyacsekii, Pant. Beitr. Bacill. L T ng. 3: pi ,: 

 Cocconeis notabilis Pant. Beitr. Bacill. LFng. 3: pi 35. f. .<:. LS 

 Cocconeis circumcincta Schmidt, Atlas pi 195. f. ' 9. L894. 



The doubl of Tempere and Brun of their ( . cun i-rotunda I »« i n^r anything more than 

 a variety of this species, indicated by their bracketing the latter name with their own. 

 i-. I think, well founded. Indeed. 1 have met with all possible varieties of these 

 extrenn ly close forms, and 1 am convinced they should he united. So also regarding 

 ' cumcincta Schmidt. Its radially arranged markings and it- generally straight 

 raphe are not sufficient to separate it from the above. It occurs at stations 3346 and 

 ".'''<»l I exclude ( heteroidea Hantzsch 1 and the variety of it regarded by Janisch 

 a- a species ( //< cella, d though both Grunow and l>e Tom are impressed with their 



■' De Toni, Syll. Alg. 2: 139 it I. 1891. 

 6 Ken/1. Reise Novara Bot. 1: I" L870. 

 < Rabh. Beitr. 1: 21. pi 6.f. 10. L8 



•h. Beitr. 1: 7. ///. /. />/. //. 



