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



24. A. binodis Greg. (1857). — Frustule lanceolate, truncate, constricted in the middle. 

 L. 0,044 to 0,05; B. 0,oi27 mm. Zone with nnmerous delicate divisions (10 in 0,oi mm.) finely 

 striate; strise about 28 in 0,oi mm. V. with straight ventral margin. Median line close to the 

 ventral margin. Dorsal side with 13 not distinctly punctate strise in 0,oi mm. Ventral side 

 with faint and closer striee; about 19 in 0,oi mm. — D. of Clyde p. 510 Pl. XII f. 67. 



Marine: Scotland (Greg.), Balearic Islands! 



25. A. angiilaris Greg. (1855). — Frustule constricted in the middle, with broad, rostrate 

 ends. L. 0,04 to 0,o6; B. 0, 02 to 0,025 mm. Zone with about 9 divisions in 0, 01 mm., very 

 finely striate. V. with slightly concave ventral margin, arcuate, and centrally sinuose dorsal 

 margins, and capitate ends. L. 0, 042; B. 0,oo8 mm. Median line close to the ventral margin. 

 Dorsal striffi 9 to 10 in 0,oi mm. not distinctly punctate. — M. J. III p. 39 Pl. IV f. 6? A. S. 

 Atl. XXV f. 83. 



Marine: Bohuslän (Atl.), Java! Macassar Straits! 



Gregory's figure is scarcely sufficient for Identification and Grunow believed it to represent 

 a form of A. coffceiformis, but it has much coarser strise. 



. 26. A. Peragalli Cl. N. Sp. — Frustule elongated, slightly constricted in the middle, with 

 truncate ends. L. 0,o55 to 0,o65; B. 0,022 to 0, 025 mm. Zone very dissimilar on the dorsal and 

 ventral side; on the dorsal side with about 5 longitudinal costse in 0, 01 mm. connected by trans- 

 verse costse, 4 to 5 in 0, 01 mm.; on the ventral side with aboiit 12 longitudinal ribs in 0,oi mm. 

 and transversely striate, strife 24 in 0, 01 mm. V. with the median line close to the ventral 

 margin. Its strise 11 in 0,oi mm. not distinctly punctate. — Amphora sp. n.? Perag. D. de Ville- 

 franche p. 40 Pl. III f. 26 (1888). 



Marine: Mediterranean, Balearic Islands! Villefranche (Per.), Adriatie, Rovigno! 

 The figure given by Peragallo does not exactly correspond with our species, as it has 

 closer (15 in 0, 01 mm.), and distinctly punctate, strise; nevertheless I have no doubt about the 

 identity. 



27. A. czekehazensis Pant. (1889). — V. with arcuate dorsal and straight ventral margin. 

 Ends rostrate. L. 0,o6 to 0,0625; B. 0, 01 to 0, 0105 mm. Median line. closely approximate to the 

 ventral margin. Strise 20 in 0, 01 mm. not distinctly punctate, but crossed by numerous, undulating 

 blank bands. — Pant. II p. 36 Pl. I f. 6. 



Brackish water: Czekehaza, Hungary, fossil! 



28. A. intersecta A. S. (1875). — Frustule linear, with truncate ends. L. 0,i6; B. 0,04 

 mm. Zone with about 4 to 5 divisions in 0, 01 mm., striate; strise 18 in 0,oi mm. V. about 7 

 times longer than broad, with slightly arcuate dorsal margin, straight ventral margin, and capitate 

 ends. L. 0, 11 to 0,i4; B. 0,02 mm. Median line near the ventral margin. Axial area distinct on 

 the dorsal side. Dorsal side with 8 strise in 0,oi mm. Strise obscurely punctate and crossed by 

 two or three longitudinal blank bands. Ventral side narrow, with short marginal strise., about 

 11 in 0,01 mm. - Atl. XXV f. 37, 38. Pant. III Pl. XII f. 190. 



Marine: Baltjik, foss. ! Bory, Hungary, fossil! 



Var. sarmatica Pant. (1886). — Strise strongly punctate. — Pant. I p. 21 Pl. XV f. 135. 

 Marine: Dolje, Hungary fossil (Pant.). 



Var.? striata Pant. (1886), — L. 0,095; B. 0,oi5 mm. Strise 10 in 0,oi mm. composed of 4 

 distant puncta. — Pant. I p. 22 Pl. XVII f. 156. 

 Marine: Dolje, Hungary, fossil (Pant.). 



