KONGL. fSV, VKT. AKADEMIP^NS HANDLINGAH. BAND 27. \:() 3. 1 10 



the valve forming transverse and decussating rows. Transverse rows ft, ohliquc rows H in o.oi 

 mm. Marginal pnncta frequently double. — Cocc. Wr. O'M. M. J. N. S, VI I Fl. VII f. (I? 

 Petit D. Campbell p. 12. PI. IV f. 3? 0. harhadenais var. nankoorensis GriiUN. Novara p. 9H 

 PI. 1 A f. 10 (1867)? 



Marine: Cape Horn (Petit Coll.)! 



None of the figures corresponds exactly with this species, so that the identihcation is 

 doubtful. As Orthoneis PefhiJi Pantocsek has figured (111 PI. IX f. 148) a similar, but acumi- 

 nate form. 



18. 0. barbsidensis Grev. (18H4). — V. elliptical to orbicular. L. (»,o.'-, to (»,()8; B. (),(i.5 to 

 0,0 5 mm. Loculiy Median line slightly undulate. Puncta more crowded near the margin, where 

 they form short stri.e, about 8 in O.di mm., transversely elongated at the median line (1) in 0,oi 

 mm.), where they form a longitudinal band on both sides of the line. The puncta of the valve 

 are larger towards the median line than towards the margin and form elegantly curved decussa- 

 ting rows. — Coec. harbadcnsls (tREV. T. M. S. XII p. 14 PI. II f. 10. Cove, naviculoides Grey. 

 T. M. S. XIII p. 34 PI. IV f. 24 (1865). 



Marine: Barbados, foss.! Oamaru, New Zealand, fossil! 



Var.(?) tcnuiimnctata Brun (1893). — L. 0. 12 to 0, 15 mm. Strife 10 to 12 in 0,ni mm. — 

 Diatomiste I p. 176 PI. XXIV f 8. 



Marine: Oamaru, fossil. 



10. 0. Grovei Cl. (1892). — V. elliptic-lanceolate, subacute. L. 0,i to 0,11; B. 0,o4 to 

 0,04 5 mm. Central area small, subquadrate. Median line undulating. Loculi sube(^ual, quadrate, 

 about 3 in 0,oi mm., forming a band along the margin. Transverse rows of puncta 9 in 0,01 mm.; 

 oblique rows 10 in 0,oi mm. Transverse rows not ending with double rows. Puncta along the 

 median line not elongated. — M. Grovei Cl. Diatomiste I p. 161 PI. XXIII f. 10. 



Marine: Barbados, loss.! 



Var. rJiombiea Cl. — V. rhombic-lanceolate. L. 0,i; B. 0,025 mm. Central area small, 

 with some isolated puncta. StricC as in the type, but near the margin crossed by a narrow blank 

 line. - PI. II f. 14. 



Marine: Barbados, fossil (Deby Coll.)! 



20. 0. cribrosa Grun. (1860). — Elliptical. L. 0,034 to 0,05; B. 0,027 to 0,0:3 mm. Loculi 

 quadrate, 2 to 4 in 0,oi mm. forming a band along the margin. Median line straight. Central 

 area indistinct. Transverse rows of puncta 7 to 10 in 0,oi mm. not ending with double rows of 

 small puncta. Oblique rows of puncta gently curved. — Mastogl. eribrosa Grun. Verb. 1860 

 p. .577 PI. VII f. 10 c. OrfhotL cribr. Grun. Novara p. 16 (1867). V. H. Syn. PI. XXVIII f 6. 



Marine: Adriatic! Nicobar Islands (Grun.), Port Jackson! Japan! Samoa! Tahiti! 

 O. eribrosa greatly resembles 0. fimbriata, but the loculi are entirely different, and there 

 are no double rows of small puncta at the end of the transverse rows. 



21. 0. Horvathiana Grun. (1860). — Elliptical. L. 0,035; B. 0,024 mm. Loculi 5 to 8 

 in 0,01 mm., rectangular, forming a broad band along the margin. Transverse rows of puncta 15 

 in 0,01 mm. Oblique rows gently curved. — 3Iast. Horvath. Grun. Verb. 1860 p. 578 PI. VII 

 f. 13. A. S. Atl. CLXXXVIII f. 41. 



Marine: Red Sea (Grun.), Samoa! Tahiti (Grun.), Honduras ((irrun.), Java (Atl.). 

 Nearly akin to 0. eribrosa and differing in its closer loculi and finer striations. This may 

 probably be regarded as 0. eribrosa var. 



22. 0. cocconeiforniis Grun. (1860). — Orbicular. L. 0,o36; B. 0,028 to 0,o3 mm. Loculi 

 8 in 0,01 mm., rectangular, forming a broad band along the margin. Puncta forming radiate 



