MANISr DIATOMS OF THE ALBATROSS VOYAGES. 365 



1880. De Toni, Syll. Alg. 2: 237. 1891. Cleve, Sv, Vet. Akad. Ilandl 26'^: 40, 



1894. 



rUafodgma affme Grim.; Cleve & Grun. Sv, Vet. Akad. HandL 17-: 51. 1880. Van 



Heur. Synop. 115. pi. IS. /. 

 1896. Perag. Le DiatoriuHtt; 

 1891. 



/ 5-8, 15-18 (not/. 4; / 



Typ 



Van Hrurck places here P. nicoharicwm Grun./'- probably basing it on Grunow's P. 

 affinr nicohanca.^ I doubt the wisdom of calling thiw a variety of P. ajjlne. 

 Certainly Grunow's type in the above citation and in Peragallo's Monographc should 

 not be forced into this species. As Cleve points out, it is nearer to P. validuvi Shadb. 



Feuiul at stations 2844, 3C07, Aleutian Islands and Uering Sea. 



Gyrosigmarigidum (W. Smith) Griff. & Ilenf. :Mier. Diet. ed. 3. 350. pL 11. f. 30. 1875. 



rUuro.n(jmarkjidiim \\\ Sniith, Synop. Brit. T>iat. 1: 04. pi, 20. f. 198, 1853, Pritch. 



IJibt. Infas. ed. 4. 918. 18G1. Rabh. Fl. Eur. Alg. 1: 232. 1864. 11. L. Smith, Sp. 



Diat. Typ. no. 410. 187 b Van Heur. Synop. pL W.f. 3, 1881; Treat. Diat. 251. 



/ 



/ 



De Toni, Syll. Alg. 2: 237. 1891, Cleve, Sv. Vet. Akad. Ilandl. 26-: 39. 1894. 

 Perag. Le Diatomist(^ 1'-': 14. pL r^.f. 2-7. 1891. Griff. & Ilenf. Micr. Diet. ed. 



4. pL 15. f. 30. 1883. 

 ineiuosigma ralidum Sha<ll>, Trans. Micr. Soc Lond. n. s. 2: 16. pL L f. 8. 1854. 

 Cleve & Grun. Sv. Vet. Akad. HandL 17': 53. 1880. De Toni, Syll. Alg. 2: 245, 



1891. 

 PJniTodgma gigantcitm Grun.; Cleve i?c Grun. Sv. Vet. Akad. Handl. 17-: 53. 1880 



(notT. giganteum Grun. Verb. Zool. Bot. G<^s. Wien 10: 558. pi. 4- / 1- 18G0). 



In the last name there is a confusion on the part of the author, which is repeated 

 in several other works. The original P. giganlcuui is not only i)lainly drawn as a 

 transverse-longitudinal striated species, but is so described, the ambiguous sentence 

 "lineolis decussatis subtillimls'' not necessarily meaning oblique lined, as any line 

 at right angles to another is strieLly ^'decussating." In the case of oblique striation 

 Grunow in that work uses sueh expressions as '*in lineas obliquas." Moreover, he 

 expressly says of P. giganteum^ "Am nadisten slulit ihm das folgende PI 

 iropintm, welches jedoch durch klein(Te Gc^stalt und starkere Biegung wesentlich 

 versthieden ist." Tins diatom is also figured ami described with transv(irse-longitu- 

 dinal stride and is univf^sally recognized as having that cliaracter. Yet Grunow in 

 his lator works f^ unitrs P. glganffum to P. validutn Shadb., and says of his own species, 

 ''PL glgantcui)ihat 18 schiefe und 17 Querstreifen," and it is so figured l)y Peragallo 



and others. 



At station 2807 occurs a small and delicate variety agreeing with a figure* which 



Peragallo erruueously speaks of as typical. 



Found at stations 2807, 3520, Galapagos Islands and Bering Sea. 



Gyrosigma sagitta (Temp. Si Brun) Mann. 



]'leuromj7na sagilla Toxu\). & Brun, Mem. Soc. Phys. et Hist. Nat. Geneva 30'': 49. 

 pi !)//, 19, 1889. De Toni, Syll. Alg. 2: 212. 1891. 



There is reasonable doul)t of this being a synoTiym (»f P. nicoharkuw Grun.,/ with 

 which it is united by Cleve and others. It not only lacks the d(ml>le-n)wed Irausverse 



arosig 



a Vviv/A, Reise Novara Bot. 1: 101. pi lAJ, 20. 1870. 



&Van Heur. Synop. 115; Supid. pi C, f. 34- 1881-5. Cf. A^an Heur. Treat. Diat. 

 252. pi 6.f, 264- 1890. Perag. Le Diatomiste V': pL 4./^ 10-12. 1891. 



<; Perag. op. cit. pi. 4-/- 9. 



dSv, Vet. Akad. Handl. 17^: 53. 1880. 



^Le Diatomiste I*--*: pi Ck f. 6. 1891. 



/Feuzl, Pveise Xovara Bot. 1: 101. pi lA,f. 20. 1870. 



