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



Strise 16 to 17 in 0,oi mm. finely lineate and, on the keel, with coarse puncta. — Kutz. Bac. p. 

 107 PI. Ill f. 63. W. Sm. B. D. I p. 44 PI. XV f. 124. V. H. Syn. p. 121 PL XXII f. 11, 12. 



Brackish water: North Sea (BohusMn! England! France! Belgium V. H.). Mediterranean 

 Sea (Peragallo). California! 



Var. intermedia Cl. — V. in L. 0,ii to 0,i5; B. 0,03; Height 0,02.') to 0,o3 mm. Striae 11 

 in 0,01 mm. 



Brackish water: New York! San Domingo (Witt Coll)! 



Var. pulchra Bail (1850). — Frustule strongly constricted. L. 0,2?; B. 0,i mm. Strise 7 

 in 0,01 mm., on the keel with large puncta, 5 to 6 in 0,oi mm. — A. pulchra Bail. Smiths. Contr. 

 II p. 38 PI. n f. 16, 18 (bad). V. H. Syn. PL XXII bis f. 1, 2, 4. 



Brackish water: Atlantic coasts of N. America! San Domingo (Witt Coll.)! 



Var. japonica Cl. — V. in the zonal view strongly constricted. L. 0,085; B. 0,02 mm. Junc- 

 tion-line bisinuose on each side of the central nodule. Strise 12 in 0,oi mm., coarsely punctate on 

 the keel. — PL I f. 2. 



Marine: Japan! 



The smaller forms of A. alata appear to graduate into A. paludosa, so that there seems to 

 be an uninterrupted series of forms from the gigantic Var. maxima to the very minute A. pal. 

 var. hyalina. The Var. japonica may be regarded as a connecting link between A. alata and A. 

 ornata. To the forms of A. alata belongs perhaps also A. biJiarensis Pant. Ill PL XLII f. 577. 



4. A. conspiciia G-rev. (1861). — V. linear-lanceolate, strongly convex. L. 0,06 to 0, 13; 

 B. 0,02 to 0,024 mm. Median line strongly sigmoid. Junction-line indistinct. StriiB 7 in 0,oi mm., 

 some of them near the median line coarser, finely lineate; lineolae about 25 in 0,oi mm. — Grev. 

 T. M. S. IX p. 86 PL X f. 16 (?). V. H. Syn. PL XXII bis f. 3. 



Brackish water: Atlantic coasts of N. America! Brazil! Sierra Leone (Gkun), Cameroon! 



5. A. ornata Bail (1852). — Frustule membranaceous, strongly constricted. L. 0,o6 7; B. 

 0,05 mm. Junction-line deeply denticulate. Strise 20 to 22 in 0,oi mm., finely punctate. — Bail- 

 Smiths. Contr. II p. 38 PL II f. 15 to 23. V. H. Syn. p. 121 PL XXII bis f. 5. A. fimhriata Castk. 

 Voy. Challenger p. 40 PL XVII f. 15 (Surirella?). 



Fresh water: Finland! Belgium (V. H.). North America (Michigan! Florida, Bail). 



6. A. crenulata Temp. (1891). — Frustule deeply constricted. L. 0,037; B. 0,03 mm. Junc- 

 tion-line sinuose. Connecting zone with several longitudinal divisions, finely striate. Strise 28 in 

 0,01 mm. V. lanceolate, with crenulated margins (denticulations 2 in 0,oi mm.), apiculate. L. 0,0*; 

 B. 0,014 mm. Median line strongly sigmoid. Basis of the keel biconstricted. Axial and central 

 areas indistinct. Keel with transverse, punctate strise, 16 in 0,oi mm. Lower part of the valve 

 with numerous, strong, transverse lines. — Temp. Diatomiste I, p. 50 PL IX f. 9, 10. 



Brackish water: New Guinea! 



7. A. Kjellmaiui Cl. (1880). — Frustule silicious, slightly constricted. L. 0,13; B. 0,04 

 mm. Junction-line undulated or not. Strise coarser on the keel than on the valve, 12 or 13 (keel) 

 to 17 (valve) in 0,oi mm. — Cl. A. D. p. 14 PL IV f. 83. 



Marine: Sea of Kara! Cape Wankarema! 



Var. glaeialis Cl. (1883). — Frustule not constricted. L. 0,07; B. 0,oi.'> mm. Strise 14 (keel) 

 to 19 (valve) in 0,oi mm. — Cl. Vega p. 477 PL XXXV f. 12. 



Marine: Cape Wankarema! 



Var. kariana Grtjn. (1880). — Frustule slightly constricted. L.0,064 to 0,07; B. 0,o36, at the 

 constriction 0,02 7 mm. Junction-line slightly sinuose. Strise 10 or 11 (keel) to 17 or 18 (valve) 

 in 0,01 mm. — A. kariana Grun. A. D. p. 61 PL IV f. 82. Franz Jo-sephs L. D. p. 53 (105). 



Marine: Franz Josephs Land (Grun.). 



