l(j p. T. CLEVE, SYNOPSIS OF THE NAVICULOII) DIATo.MS. 



StricE 16 to 17 in 0,oi mm. finely lineate and, on the keel, with coarse puncta. — KdTZ. Bae. p. 

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



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

 Sea (Peragallo). California! 



Var. intermedia Cl. — V. in L. 0,ii to 0,1.''); B. 0,0;?; Height (),02.'-> to (1,03 mm. Stritc 11 

 in 0,01 mm. 



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



Var. pulchra Bail (1850). — Frnstule strongly constricted. L. 0,27; B. 0,1 mm. Stria; 7 

 in 0,0 1 mm., on the keel Avitli large puncta, 5 to 6 in 0,0 1 mm. — A. piiJc/ira Haii,. Sniitlis. Contr. 

 11 p. 38 PI. II f. 16, 18 (bad). V. H. Syn. PI. XXII bi.s 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. (),08.^); B. 0,o2 mm. Junc- 

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

 the keel. — PI. I f. 2. 



Marine: Japan! 



The smaller forms of A. (tUiht appear to graduate into A. pdlitdnsa, so that there seems to 

 be an uninterrupted series of foi'ms from the gigantic Var. maxima to the verj^ minute A. ])al. 

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

 ornrifd. To the forms of A. alata belongs perhaps also A. hiharensis Pant. Ill PI. XLII f. 577. 



4. A. conspieiiJi GtREV. (1861). — V. linear-lanceolate, strongly convex. \i. 0,o6 to 0,13; 

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

 some of them near the median line coarser, finely lineate; lineola". about 25 in 0,01 mm. — (Irev. 

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



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



5. A. ornata Bail (1852). — Frustule meni])ranaceous, strongly constricted. L. 0,007; B. 

 0,05 Miiu. Junction-line deeply denticulate. Sti'ia; 20 to 22 in 0,oi mm., finely punctate. — Bail- 

 Smith.s. Contr. II p. 3S PI. II f. 15 to 23. V. H. Syn. p. 121 PI. XXII bis f. 5. A. fmhriata Ca^tr. 

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



Fresh water: Finlaml! 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. (Jonnecting zone witli several longitudinal divisions, finely striate. Stria; 28 in 

 0,01 mm. V. lanceolate, with crenulated margins (denticulations 2 in 0,oi mm.), apiculate. L. 0,04; 

 B. 0,0 14 mm. Median line strongly sigmoid. Basis of the keel biconstricted. Axial and central 

 areas indistinct. Keel with transverse, punctate strire, 16 in (),oi mm. Lower part of the valve 

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



Brackish water: New (xuinea! 



7. A. Kjelhnanii Cl. (1880). — Frustule silicious, slightl}- constricted. L. 0,13; B. 0,o4 

 mm. .Innction-line undu^ited or not. Stria; coarser on the keel than on the valve, 12 or 13 (keel) 

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



Marine: Sea of Kara! Cape Wankarema! 



Var. glacialis Cl. (1883). — Frustule not constricted. L. 0,07; B. 0,oi.^, mm. Striit; 1-1 (keel) 

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



Marine: ('ape Wankarema! 



Var. kariana Grt'N. (1880). — Frustule slightly cdiistricted. L.O,()r,i to 0,07; P>. l),o3r,, ai Ihe 

 constriction 0,027 mm. Junction-line slightlj'^ sinuose. Striie 10 or 11 (keel) to 17 oi' 18 (valve) 

 in 0,01 mm. — A. Icariana Grun. A. I). ]). 61 PI. IV f. H->. Franz Josephs L. I), p. 53 (105). 



Marine: Franz Josephs Land ((tRUX.). 



