104 



P. T. CLEVE, SYNOPSIS OF THE NAVICULOID DIATOMS. 



Var. Gruiiowii Cl. — V. very slightly constricted, with broad tongue-shaped segments. 

 L. 0,07 to 0,09; B. 0,033 to 0,039; at the constr. 0, 03 to 0, 037 mm. Furrows very broad. Go.stae 

 5,!) to 7 in 0,01 mm. alternating witli ocelli, forming some few more or less undulating, longitu- 

 dinal rows. — Nav. gemmafula Grun. A. S. Atl. Xin f. 20, 21 (37, 40?). Nav. lacrimans A S. 

 Atl. XII f. 61. 



Marin e: Balearic Islands! Red Sea! Maiiritius! Tamatave! Sumatra! Yokohama! Samoa! 

 Campeachy Bay (Atl.). Fossil: Moravian Tegel! S:ta Monica, Calif. (Deby Coll.)! 



Var. lacrimans A. S. (1875). — V. elongated, slightly constricted in the middle. L. O.09 to 

 0,14; B. 0,031 to 0,045; at the constr. 0, 02.1 to 0, 04 mm. Furrows broad. Costae 5 in O.oi mm. 

 Ocelli about 4 in 0, 01 mm., forming longitudinal rows. — Nav. lacrimans A. S. Atl. XII f. 59, 60. 

 Nav. gemmatula Cl. D. of Mor. Tegel Pl. XII f. 1. Nav. lacr. var. fossilis PaNt. II p. 49 Pl. II 

 f. 18. Nav. Taschenbergeri A. S. Atl. CLXXXIV f. 8 (1892). 



Marine: Tamatave (Deby Coll.)! Campeachy Bay! Colon! Fossil: Szåkal, Hungary! Mora^åan 

 Tegel! 



Var. JSeyrichiana A. S. (1861). — V. slightly constricted, with cuneate ends. L. 0, 09 to 

 0,144; B. 0,35 to 0,062; at the constr. 0,027 to 0, 053 mm. Furrows of median breadth, distinctly 

 dilated around the central nodule. Costse 6 in 0, 01 mm. alternating with rows of lars-e ocelli 

 (about 5 in 0,oi mm.). — Nav. Beyrichiana A. S. Atl. LXIX f. 16, 17. 



Marine: Gulf of Naples! Madagascar! Java! China! Indian Ocean (Deby Coll.)! Cape Horn 

 (Petit). Fossil: Hungary! ^gina (Atl.). 



Forma minor Pant. (1886). — V. nearly elliptical. . L. 0,o69; B. 0,034 mm. Costa; and 

 ocelli about 5,5 in 0, 01 mm, — Nav. Beyr. var. minor Pant. I p. 23 Pl. III f. 31. 



Marine: Hungary, fossil (Petit). 



Var. Moravica Cl. — V. slightly constricted, with broad, cuneate ends. L. 0,i6; B. 0,o68; 

 at the constr. 0,ii6 mm. CosttB 4 in 0, 01 mm. Ocelli scattered, 2 to 3 in 0, 01 mm. 



Marine: Moravian Tegel (Deby Coll.)! 



83. D. lesinensis Grun. Ms. — V. elongated, usually very slightly constricted, with broad, 

 tongue-shaped segments. L. 0,o72 to 0,22; B. 0, 03 to 0,057; at the constr. 0,02s to 0,oöi mm. 

 Central nodule small, its horns parallel, approximate. Furrows narrow, linear, scarcely dilated in 

 the middle, with a row of large puncta or rudiments of the costtE. Costee 5 to (i in 0,oi mm. 

 alternating with rows of large and close ocelli (5 to 7 in 0,oi mm.) and double rows of small, 

 sometimes little distinct, alveoli (about 12 to 18 in 0,oi mm.). — Pl. II f. 17, 18. 



Marine: Balearic Islands! Gulf of Naples! Adriatic! Red Sea! Sumatra (Deby Coll.)! Philip- 

 pines (Rae Coll.). 



D. lesinenses has the form and apjiearance of a large i). Enfomon. 



Additional. 



Navicula Buäayana Pant. III Pl. IV f. 57 (1893) seenis to belong to the varieties of 

 D. elliptica. 



Navicula ellijifica var. fossilis Pant. III Pl. II f. 32 perhaps a small form of B. Smithii, 

 which I am unable to decide as the minute striicture is not visible on the figure. 



Navicula i^ervasta Pant. III Pl. XXXVl f. 510 a large form, very similar to D. major 

 var. permagna, bnt the alveoli are drawn as forming single rows. 



