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



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

 L. 0,044 to 0,05; B. 0,oi27 mm. Zone with numerous 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 striae in 0,oi mm. Ventral side 

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



Marine: Scotland (G-reg.), Balearic Islands! 



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

 ends. L. 0,04 to 0,06; B. 0,02 to 0,025 mm. Zone with about 9 divisions in 0,oi 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 striae 9 to 10 in 0,oi mm. not distinctly punctate. — M. J. Ill p. 39 PI. IV f. 6? A. S. 

 Atl. XXV f. 83. 



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



Gregory's figure is scarcely suflicient for identification and Grunow believed it to represent 

 a form of A. coffeeiformis, but it has much coarser striae. 



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

 truncate ends. L. 0,055 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 costae in 0,oi mm. connected by trans- 

 verse costae, 4 to 5 in 0,oi mm.; on the ventral side with about 12 longitudinal ribs in 0,oi mm. 

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

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

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



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



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

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

 identity. 



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

 Ends rostrate. L. 0,o6 to 0,0625; B. 0,oi to 0,oio5 mm. Median line closely approximate to the 

 ventral margin. Striae 20 in 0,oi 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,o4 

 mm. Zone with about 4 to 5 divisions in 0,oi mm., striate; striae 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,ii to 0,i4 ; B. 0,02 mm. Median line near the ventral margin. Axial area distinct on 

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

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

 11 in 0,01 mm. — Atl. XXV f. 37, 38. Pant. Ill PL XII f. 190. 



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



Var. sarmatica Pant. (1886). — Striae 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. Striae 10 in 0,oi mm. composed of 4 

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

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



