148 p. T. CLEVE, SYNOPSIS OF 'fHE NAVICULOII) DIATOMS. 



12. 0. (Stictoneis) binotsita Grun. (l«(io). -^ V. elliptical. L. 0,033; B. 0,022 mm. Locu- 

 ]us single in tlie middle of one of the margins (entire frustules shew one lociilus on each side), 

 lai'ge with convex interior margin. Central area transversely dilated to a short pseudostauros. 

 Sti'itE 13 in 0,01 mm., radiate near the ends, punctate; puncta about 11 in 0,oi mm. forming curved, 

 oblique rows. — Cocconeis Scufcllitm y Roper M. J. VI p. 24 PI. Ill f. 9. C'occ. hinotata GtRun. 

 Verh. 1863 p. 145 PI. IV f. 13 a, h. Orfhon. hinot. G^run. Novara p. 15. V. H. Syn. PI. XXVIII f. 7. 



Marine: England! France! Mediterranean Sea! Adriatic Sea! Red Sea (Grrun.), Nicobar 

 Islands (Grun.), Island of Rhea! Australia! Cape Good Hope (Grun.), West Indies! 



Var. atlcoitica Grun. — V. elliptical to elliptic-laneeolate. Loculi elongated. Strict' liner. 

 — Novara p. 15 PL I f. 11. 



Marine: Atlantic, Honduras (Grun.). 



On living specimens a long horn of mucoid substance projects from the loculus. 



13. 0. (StiotoiKMs) C'riicicula Grun. (1<s77). -- V. elliptical. L. o.om to 0,017; B. 0,008 

 to 0,01 mm. Loculi along the whole margin, 4 on each side, with invard margins convex. Central 

 nodule transversely dilated into a stauros. Stria; 22 in 0,oi mm., slightly radiate, finely punctate 

 (puncta in decussating lines?) — M. J. 1877 p. 177 PL CXCV f. 8. 



Marine: Honduras, Adriatic (Grun.). 



14. 0. (Stictoneis) flmbnjita Btw. (1859). -- V. elliptical. L. 0,02 to 0,0,5; B. 0,017 to 

 0,033 mm. Loculi large, 3 to 6 on each side, with interior margin convex. StrirE 7 to 8 in0,oi 

 mm. coarsely punctate; puncta 7 to 8 in O.oi mm. forming oblicjue and curved lines. The rows of 

 puncta end near the margin in double roAvs of small puncta. — Coccon. finihr. M. J. VII p. 179 

 PL IX f. 13. Masiogloia crihrosa Grun. Verh. 1860 p. 577 PL VII f. 10 d. 



Marine: Mediterranean and Adriatic Sea! Mauritius! Madagascar! Sumbava! Japan! China! 

 Australia! Oceania! Honduras and Brazil (Grun.). 



15. 0. Clevei Grun. (1880). — V. elliptical. L. 0,o4h; B. 0,03 mm. Loculi 2,r. in 0,oi 

 mm. narrower outwards. Striai 8 in 0,oi mm. of large puncta, about 8 in 0,oi mm. forming 

 oblique rows. The stria- end at the margin in double rows of small puncta. — V. H. Syn. 

 PL XXVIII f. 4. 



Marine: Mauritius! Seychelles! Java! Barbados (Grun.). 



Resembles 0. fimhriata, but has shorter, more numerous loculi, which become narrow outward. 



16. 0. spltMidida Greg. (1857). — V. elliptical. L. 0,o7 to 0,17; B. 0,or,2 to 0,13 mm. 

 Loculi 2 to 3 in 0,oi mm., narrowed outwards. Their inner margin straight. The ends of the 

 median line curved in the same direction. Stria; 5 to 6 in 0,oi mm. slightly radiate, composed 

 of large puncta, forming elegantly curved and decussating rows, 4 to 5 in 0,oi mm., ending near 

 the margin in double rows of small puncta. — Cocc. splendida Greg. D. of Clyde p. 493 PL IX 

 f. 29. Cocc. piiuctaiissima Grev. M. J. V p. 8 PL III f. 1 (1857). M. cribrosu Grun. Verh. 1860 

 p. 577 PL VII f. 10 a. Orthon. s^jlend. Grun. Novara p. 15 (1867). V. H. Syn. PL XXVIII f. 1, 2. 

 Truan a. Witt D. of Jeremie PL IV f. 13. Pant. II PL XXIV f. 352. 



Marine: Scotland (Greg.), Bohuslan! Mediterranean Sea! Adriatic! Red Sea! Seychelles! 

 Madagascar! Sumatra! China! Japan! Oceania! Galapagos Islands! Honduras (Rabh.), Colon! West 

 Indies! Fossil: Hungary! Moravia! Nankoori! California! Jeremie (Truan a. Witt), Oamaru! 



Widely distributed and easily recognized species. Fossil specimens from Moravia and Hun- 

 gary attain a gigantic size. 



17. 0. VVriglitii O'Meara (1867). — V. broadly elliptical. L. 0,027 to 0,034; B. 0,oi8 to 

 0,02.^) mm. Median line straight, not reaching to the margin and enclosed between two rows of puncta, 

 12 to 1.3 ill 0,01 mm. Loculi -S in 0,oi mm. equal, (juadrate, forming a marginal rim. Puncta of 



