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



jns (baltica var.?) mediterranea Grun. A. D. p. 66. Amphiprora {Flagiotr.\ medii. Grun. in V. H. 

 Syn. PL XXn f. 14. 



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



Var. scaligera Grun. (1880). — Frnstule scarcely constricted. L. 0,i to 0,i3; B. 0,02 5 to 0,o'4 5 

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

 {baltica var.?) scaligera Grun. A. D. p. 66, PL 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 

 Grbv. (Edinb. N. Ph. J. XYIII 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 asymmetrioal. 

 L. 0,4; 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 striae forming several longitudinal rows. 



19. T. Zebra Cl. (1892). — 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. Strise 

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

 p. 75 PL 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 ram. Longitudinal band very obscure. Strise 16 to 19 in 0,oi mm. 

 somewhat more distant in the middle, punctate. — Plagiot. 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,o32 mm. The broader side of the valve with a very broad band. Central area 

 small, but distinct. Transverse strise 14, longitudinal 17 in 0,oi mm. — PL III f. 1, 2. 



Marine: Sumbava (Kinker ColL)! 



22. T. lata Cl. N. Sp. — V. not constricted. L. 0,135; Height 0,035 mm. On the broader 

 side of the valve there is a band inter upted in the middle. Transverse striee 18 in 0,oi mm. 

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



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



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

 in the middle. L. 0,o8 to 0,09; B. 0,02 to 0,028 ram. V. strongly inequilateral, without distinct 

 wing. Transverse strise 21 to 24 in 0,oi mm. — Amphipr. recta Greg. T. M. S. Vol. V. p. 76 

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

 bis f. 9, 10. 



Marine: Firth of Tay! 



Var.? subplicata Grun. (1880). — L. 0,05i; B. 0,oi8 mm. Wing obscure. Transverse strise 

 17 in 0,01 mm. — Amphipr. plicata v. subplicata Grun. A. D. p. 65 PL V f. 88. 

 Brackish water: Sea of Kara (Grun.). 



24. T. conserta Lewis. (1861). — Frustule membranaceous, rectangular, with rounded 

 angles, slightly constricted in the middle. L. 0,08 to 0,io; B. 0,034 to O.04 mm. V. lanceolate 

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

 Philad. 1861, PL I f. 5, 



