384 CONTRIBUTIONS FROM Mil. NATIONAL HERBARIUM. 



rurp Hat -' 107 1871 !>• Toni, Byll. A; D 



Voviila Heil I >ial 24. 1863. I leve, Bih. - \kad. 



Handl 1 : 11. L8 



in. in Cleve, Ofv. Kgl. Vet. Akad. 88 10 : 7. L882. Mull. 

 typ ibgenua. 



Mi. r. Journ. 18: 172. pi '■> b 18" - tnidt, 



Atlas 

 \ Bory, in pari Ehrenb. [nfus. L86. pi i , /. / .'. pi. '/./. 



II. i— in part Kut I '..)• ill. 60. pi 1844. 



' i Ehrenb. in part; Grun. Verh. Zool. Bot. Gee Wien 12: 156. /</. 9./. 10. 



William Smith in discussing the relatione of this genus, considers it to be close to 

 those robust forms of Nitzschia which he calls Tryblionella; its nearer affinit) is, 

 however, » ampylodiscus Ehrenb., from which ii di ffere simplj in the circular outline 

 and uniform saddle shape of 1 1 » * * latter. These differences are so constant thai an 

 unnecessary loss to classification would result from uniting the two genera. The 

 st approach to an intermediate form is to !><■ found in Surirella spiralis Kutz. 

 (Campylodu - Kutz. \\ . Smith ). The genus has a more remote r< 



blance to Sphinctocystis Hass. Cymatopleura \\ . Smith . bul excepl in a few forms 

 no confusion can arise between the two. 



The separation of the greatly elongated forms into the genus Stenopterobia of the 

 kidney-shaped sports into the genus Plagiodiscus and of the forms showing a wedge- 

 shaped appearance from the zonal Bide int<> the genus Novilla are utterly useless 

 distinctions. The attempt of Pfitzer and I><' Toni to change the name into Suriraya 

 so as to make it lit better the name of the French physician, Doctor Suriray, in whose 

 honor Turpin formed the name, is inexcusable, as Turpin had a right to call iii> i.^ « * > » i » ^ 

 wluitrx er name be \\ ished. 



Surirella bifrons Ehrenb. Phys. Abh. Akad. Wise. Berl. 1841: 388. pi. S. V.f.5, 

 pi. .. III. i. i. 1843; Mikrog. pi. 14./.S6, pi 15, .1. f. \6. l'-.f. 11 (pi. :. /../". I 

 and pi. 7. III. A./ 11 20 are indeterminate . 1854. Schmidt, Atlas pi. It./. 5. 

 10 It, pi. :.'./. 6 (unnamed), pi U./. i '.. 1875; pi 245./ 8 10. L904. Griff. & 

 II. i,t. Micr. Diet. ed. i. 7 Hi. pi 17./. a. 1883. Kutz. Racill. 61. pi ;../'. 10, pi. 

 I844. Rabh. Sussw. Diat. 29. pi •;../". U. - 

 cula bifrons Ehrenb. Phys. Abh. Akad. Wiss. Berl. 1832: 259. L834. Ber. 

 Akad. Wiss. Berl. 1836:53. L837; Infus. 186. pi 14./. '■ l^ s - 

 Surirella biseriata Breb. Consid. Diat. 53. pi 7. 1838. Hass. Ili.-t. Brit. Alg! 

 pi m.'.f. i. L845. W. Smith, Ann. Mag. Nat. Hist. II. 7: 8. pi ?./ /. 1851; 

 Synop. Brit. Dial. 1:30. pl.8./.57. 1853. (.run. Verh. Zool. Bot. Ges. Wien 

 12: 154. pi 10./. :. L862. Rabh. I'l. lair. Alg. 1: 9, 53./ 12b c. I864. Pritch. 

 Hist, fnfus. ed. 4. 794. pi 16./ :<> ?6. L861. Schmidt. Atlas pi //./". /.; / ;. 

 L875. II. 1.. Smith, Sp. Diat. Typ. no. ;,i i. L874. Brun, Diat. Alp. 99. pi . 

 ■ii. .t /. 9 . i>l. ''./'. 17. 1880. Belloc, Rev. de Comm. 3: 52. pl.3./. :!. 1887. 

 Van Heur. Synop. L86. pi. 7t./ I S. L881; Treat. Diat. 368 369./ ItO, pi It. 

 / 575. 1896. 



aya biseriata Breb.; De Toni, Syll. Alg. 2: 567. 1892. 

 Kutzing, Griffith and Henfrey, and Elabenhorst have rightly united S. bifrons and 

 S. biseriata under the former name. Most authors give preference to Brebisson'a 

 name, though nearly all except Schmidt in his Atlas recognize thai the two are synony- 

 mous. Ehren berg's name, accompanied by a clear diagnosis, \s prior to that of Breb- 

 isson. hi- found in the volume of the Abhandlungen for L833 whichisdated 1835; 

 but -mi the fascicle in which it occurs is printed, "Gelesen in der Akademie del 

 Wissenschaft am 2 Juli L832, revidirt und mil « • i 1 1 i lt « * 1 1 Zusatzen gedruckl im Mai 1834." 

 Pound at stat ion 3607, Bering 



W. Smith, Synop. Brit. Diat. 1: 29. pi 



