41 



NOVARA DIATOMS. 



Descriptions of New Genera and Species of Diatoms obtained by the 

 Austrian Imperial Frigate Novara, during her Voyage round the 

 World. 



By Herr A. Grunow. 



(Translated by F. Kitton.) 



Part I. (with Plate ii.) 



(Continued from page 32.) 



Orthoneis binotata, Grun. = Cocconeis binotata = C. scutellum, 

 7, Roper, Mic. Jour. vol. vi. 6, pi. 3, f. 9. 



Var. ? atlantica. — Valves ovate, sometimes lanceolate ovate, 

 striato- punctate, delicate, marginal marking elongate. [PI. 2, f. 

 11, ab c.~\ 



On Sargassum bacciferum in the Atlantic Ocean. 

 Mastogloia marginulata, Grun., n. sp.— Minute, valves narrow, 

 lanceolate, obtuse; marginal loculi minute 30 — 33 in. .001 ; stii;i3 

 transverse, delicate, 60 in. -001; central nodule small, oblong. [PL 

 2, f. 12, a b.~\ 



On Sargassum plumo sum, from New Zealand, and not uncommon 

 on Algre from the Island of Tahiti. 



Pleurostauron Fxauenfeldianum, Grun., n. sp. — Small valves 

 narrow, lanceolate, somewhat acute; stauros broad, dilated toward 

 the margin ; strice delicate, transverse. [PL 2, f. 13, ab c d.~\ 

 Fossil in Essebaren Erde (Bergmehl) from Java. 

 ( = Stauroneis scaphulceformis, Greville, Mic. Jour. vol. xiv. 

 pi. 9, f. 32, differs from S. legumen var. of Lewis, in the ends of 

 the stauros being dilated. F. K.j 



P. javanicum, Grun. — Large; valves lanceolate ; apices some- 

 what obtuse ; stauros broad, dilated towards the margin ; striai 

 transverse, punctate, 33—100". [Plate 2, f. 14.] 

 Bergmehl, Java. 



(This form is identical with S. phamecenteron, Ehr., and the 

 Synopsis. Smith's specific characters are " lanceolate, obtuse ; 

 stauros linear, reaching the margin ; strise 33 in. *001 ; length 

 •0055 to -0066." Grunow gives the length of his specimens as 

 •0056" to -006". F. K.) 



Stauroneis oblonga, Grun. n. sp. — Small, valves broad, linear, 

 oblong ; apices rounded ; stauros narrow, linear, reaching the mar- 

 gins of the valves ; striae punctate, delicate, 40 in. -001. [PL 2, f. 

 15, a b.~] 



Bergmehl, Java. 



Resembles my S. bacillum, but differs in its greater breadth 

 and more conspicuous striation. 



Navicula Javanica, Grun , n. sp.— Valve convex, narrow, lanceo- 

 late, somewhat acute, a well-marked undulating line on each side 



