Bacillarieae, Tracbyspheniacefe, Sceptroneis. 645 



Sceplroneis Ehr. — Valva} fere Trachij sphenm, gomphonematoideao sed fru- 



stiila e zona coiinectivali cuneiformia. 

 Opephora Petit. — Valvtu cuneiformes, punctis crassis transverse elongatis 



ornata;; pseudorhaphe subinde latior; frustula e zona connectivali cunei- 



formia. 

 Peronia Br^b. et Arn. — Valva^ cuneiformes, crasse striatie et transverse 



subcostatae, pseudorhaphc nuUa, pseudonodulis terminalibus praesentibus. 



Frustula e zona connectivali cuneiformia. 



TRACHYSPHENIA Petit [1877] Diat. Campb. et N. Zel. p. 32(Etyin. 

 irachys rudis et sphen cuneus), De-Toui [1890] Osserv. tasson. 

 Bacill. p. 904. — Frustula e facie connectivali visa rectangularia; 

 valvse cuoeiformos, rarius subellipticse, punctis crassis in series 

 transversas et longitudinales dispositis oruatse, pseudorhaplie plus 

 rainus angusta. Costse transversse nullae. 



1. Trachysphenia australis Petit Cat. p. 32, t. 5, f. 19, J. R. M. S. ^ses 

 1878, p. 243, t. 15, f. 19 non Cleve Diat. Vega pag. 500, t. 37, 

 fig. 54 nec Rhaphoneis australis H. L. Sm. — Characteres ge- 

 neris, valvis 35-52 := 8-11; punctis 6 in 10 [x. 



Hab. ad «Lyairs Bay » et ins. uCampbell)) (PEriT); ad Caput 

 ((Horn» Americae australis (Petit). — Var. aucklandica Grun. in 

 V. H. Syn. t. 37, f. 1, Rhaphoneis ausiralis H. L. Sm. in Araer, 

 Quart. Micr. Journ. 1878, p. 14, t, 3, f. 6, Traohtjsphema austra- 

 lis Cleve Diat. Vega p, 500, t. 37, f. 54 non P. Petit: frustulis 

 raagnitudine variabilibus, 12-22 ^ 5-10, e facie connectivali visis le- 

 nissime cuneatis; valvis cuneatis, apice latiore rotundatis, grosse 

 raoniliforrai-granulatis, striis pseudorhaphe levi hyalina raedio 

 interruptis, 11-12 in 10 ,/. In ((Royal Sound, Kerguelensland » (J, 

 H. KiDDER, H. L. Smith); ad (( Labuan » insulse Bornei (Kjell- 

 MAN, Cleve) ; ad (( Port Jackson » (Cleve). — Var. kerguelensis 

 (0' Meara), Terebraria kerguelensis 0' Meara Diat. Kerguel. p. 56, 

 t. 1, f. 4: frustulis in filaraentum conjunctis, paribus singulis ara- 

 bitu lenticularibus, facie connectivali strias ut puncta marginalia 

 raagna ostendente; valvis elliptico-lanceolatis, 70^12-13, striis 

 raoniliformibus, parallelis, perviis. In superficie maris inter ins. 

 ((Heard et Kerguelen », sociis Chcetocerotibus. Rhizosoleniis, He- 

 miaulo aniarctico, G omphonemate antarctico, Diatomate rhom- 

 bico etc. (H. N. Moseley). 



SCEPTRONEIS Ehr. [1844] in Ber. Berl. Akad. 1844, p. 264 (Etyra. 

 scepiron, ob valvarura forniara), Rabenh. Fl. Eur. Algar. I, p. 299, 

 De-Toni Osserv. tasson. Bacill. p. 904. — Frustula siraplicia, af- 



