28 r. T. CLEVE, SYNOPSIS OF THE NAVICULOID DIATOMS. 



j)is (halt tea var.'^) mediterranca Grun. A. I), p. 66. Amph'qrrora (Plagiotr.^ niedit. Grun. in V. H. 

 Syn. PI. XXII f. 14. 



Marine: Mediterranean Sea (Grun.), Adriatic (Grun.), Samoa (Grun.), Connecticut, Morris Creek! 



Var. scaligcra Grun. (1880). — Frustule scarcely constricted. L. 0,i to 0,1.3; B. 0,025 to 0,045 

 mm. The longitudinal band with coarse, transverse ribs. Striic 17 to 18 in 0,oi mm. — Flayiotr. 

 (baltica var.?) scaligera Grun. A. D. p. 66, PI. V f. 90. 



Marine: Finmark! 



The longitudinal band in this species appears to be subject to great variation. In the type 

 it is always scarcely perceptible; in the varieties, it forms a broad band. — Amphiprora? superba 

 Grev. (Edinb. N. Ph. J. XVIII p. 39 f. 17, 1863) represents probably a large form akin to T. vitrea. 



18. T. seriata Cl. (1892). — V. in the zonal-view linear, with straight dorsal margin, cur- 

 ved only at the ends, not constricted in the middle, very elevated and distinctly asymmetrical. 

 L. 0,^ ; Height 0,o4 mm. Transverse strise 12 in 0,oi mm. crossed by several, blank, longitudinal 

 bands. — Cl. Diatomiste I p. 75 PL XII f. 2 to 4. 



Marine: Connecticut! Colon! Jamaica! 



This species, evidently akin to T. elegans, is remarkable for its large size and the peculiar 

 striation; the striir forming several longitudinal rows. 



19. T. Zebra Cl. (1S92). — V. strongly asymmetrical, lanceolate. L. 0,i8; B. 0,03 mm. 

 Central area indistinct. There is a broad, marginal band on the broader side of the value. Strite 

 5 to 6 in 0,01 mm. inequidistant, finely punctate, puncta 21 in 0,oi mm. — [Cl. Diatomiste I 

 p. 75 PI. XII f. 1. 



Brackish water: Newark, N. Jers. fossil from the Champlain epoch ! Brazil, S:t Vincent! 



20. T. samoensis Grev. (1880). — Frustule strongly constricted in the middle. V. in length 

 0,095 to 0,12; B. 0,023 to 0,027 mm. Longitudinal band very obscure. Stripe. 16 to 19 in 0,oi mm. 

 somewhat more distant in the middle, punctate. — Flof/iot. samoensis Grun. A. D. p. 67. 



Marine: Samoa (Grun.), West Indies (Grun.). 



21. T. Kinkeriana Cl. N. Sp. — V. strongly asymmetrical, not constricted in the middle. 

 L. 0,2; Height 0,032 mm. The broader .side of the valve with a very broad band. Central area 

 small, but distinct. Transverse .strite 14, longitudinal 17 in 0,oi mm. — PI. Ill f. 1, 2. 



Marine: Sumbava (Kinker Coll.)! 



22. T. lata Cl. N. Sp. — V. not constricted. L. (),\^h; Height 0,035 mm. On the broader 

 side of the valve there is a band interupted in the middle. Transverse striffi 18 in 0,oi mm. 

 punctate; puncta, about 23 in 0,oi mm., forming undulating, longitudinal rows. — PI. Ill f. 3, 4. 



Marine: Java, Rembang Bay (Deby Coll.)! 



23. T. recta Gre(^. (1857). — Frustule rectangular, with rounded angles, slightly constricted 

 in the middle. L. 0,08 to 0,09; B. 0,o2 to 0,c)28 mm. V. strongly inequilateral, without distinct 

 wing. Transver.se strite 21 to 24 in 0,oi mm. — Ampliipr. reeta Greg. T. M. S. Vol. V. p. 76 

 PI. I f. 40. Flagiotr. recta Grun. Cl. M. D. N:o 310. Amphoropsis recta Grun. V. H. Syn. PI. XXII 

 bis f. 9, 10. 



Marine: Firth of Tay! 



Var.? suhplicata Grun. (1880). — L. 0,o5i; B. 0,oi8 mm. Wing obscure. Transver.se strije 

 17 in 0,01 mm. — Avqihipr. jdicata v. suhplicata Grun. A. D. p. 65 PI. V f. 88. 

 Brackish water: Sea of Kara (Grun.). 



24. T. conserta Lem'IS. (1861). — Frustule membranaceous, rectangular, with rounded 

 angles, slightly constricted in the middle. L. 0,08 to 0,10; B. 0,o34 to 0.o4 mm. V. lanceolate 

 Keel with a number of coarse, radiate ribs. — Amphipr. conserta Lewis. Proceed. Ac. Nat. Sc. of 

 Philad. 1861, PI. I f. 5. 



