148 p. T. CLEVE, SYNOPSIS OF THfi NAVICULOII) DIATOMS. 



12. 0. (Stictoneis) binotata Grun. (1863). — V. elliptical. L. 0,033; B. 0,022 mm. Locu- 

 lus single in the middle of one of the margins (entire frustules shew one loculus on each side), 

 large with convex interior margin. Central area transversely dilated to a short pseudostauros. 

 Strise 13 in 0,oi mm., radiate near the ends, punctate; puncta about 11 in 0,oi mm. forming curved, 

 oblique rows. — Cocconeis Scutellmn y Roper M. J. VI p. 24 PL III f. 9. C'occ. hmotata Gtkun. 

 Verb. 1863 p. 145 PI. IV f. 13 a, h. Orthon. binot. Grun. Novara p. 15. V. H. Syn. PL XXVIII f. 7. 



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

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



Var. atlantica Grun. — V. elliptical to elliptic-laneeolate. Loctili elongated. Stride finer. 

 — 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. (Stictoneis) Cnicicula Grun. (1877). — V. elliptical. L. 0,oi4 to 0,017; B. 0,oo8 

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

 nodule transversely dilated into a stauros. Strise 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) iimbi-iata Btw. (1859). — V. elliptical. L. 0,02 to 0,05; B. 0,017 to 

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

 mm. coarsely punctate; puncta 7 to 8 in 0,oi mm. forming oblique and curved lines. The rows of 

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

 PL IX f. 13. Mastogloia cribrosa Grun. Verb. 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,o4fi; B. 0,o3 mm. Loculi 2, .5 in (»,oi 

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

 oblique rows. The strise 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. fimbriata, but has shorter, more numerous loculi, which become narrow outward. 



16. 0. splendida Greg. (1857). — V. elliptical. L. 0,o7 to 0,17; B. 0,052 to 0,i3 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. Strise 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. punctatissima Grbv. M. J. V p. 8 PL III f. 1 (1857). M. cribrosa Grun. Verb. 1860 

 p. 577 PL VII f. 10 a. Orthon. splend. 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. Wrightii O'Meara (1867). — V. broadly ellipticaL L. 0,027 to 0,034; B. 0,oi8 to 

 0,0 2 5 mm. Median line straight, not reaching to the margin and enclosed between two rows of puncta, 

 12 to 13 in 0,01 mm. Loculi 8 in 0,oi mm. equal, quadrate, forming a marginal rim. Pmncta of 



