KONGL, SV. VET. AKADEMIENS HANDLIN6AR. BAND 27. N:0 3. 193 



p. 439 PI. VI f. 6, 7. Achnanthes inflata Grun. A. D. p. 19. Navicula elata Leud. Fortm. D. de 

 Ceylon PL III f. 28. Achn. brevipes var. tumidula Grun. A. D. p. 19. 



Fresh water, in tropical and subtropical regions: South Tyrol (Grun.), Pompeii (Grun.), 

 Java! Australia! Tasmania! New Zealand! Tahiti! Brazil! Ecuador! Cuba (Gi-un.), Bourbon and 

 Mauritius (Ehb.). 



Var. Smithiana Grev. (1866). — Ends cuneate. Striae coarser. — Monnqrcmma Smithimui 

 Grev. T. Bot. Soc. Edinb. Vol. VIII PI. VI f. 3 to 5. 



Fresh water: Mauritius and New Hebrides (Grun.). Cameroon, Africa! 



7. A. brevipes Ag. (1824). — Linear-lanceolate, frequently slightly constricted in the 

 middle, with cuneate ends. Upper V. with somewhat excentric axial area and transverse rows of 

 coarse puncta forming irregular longitudinal rows. Lower V. with indistinct axial area. Central 

 nodule transversely dilated into a stauros, reaching to the margin. Strii3e slightly radiate. Frus- 

 tule genuflexed, stipitate. Connecting zone finely and transversely striate. 



Var. parrula Kuxz. (1844). — Elliptical. L. 0,oi to 0,02; B. 0,oo5 to 0,oo7 mm. Upper V. 

 with 12 to 18 strise in 0,oi mm. Lower V. with abovit 15 strise in 0,oi mm. — A. parvula Kutz- 

 Bac. p. 76 PI. XXI f. 5. Grun. A. D. p. 19. V. H. Syn. p. 129 PI. XXVI f. 25 to 28. A. pa- 

 chypus Mont. Ann. Sc. nat. (2) T. VIII p. 348 (accord, to Kiitz.). Ktixz. Bac. p. 76 PL XXI f. 2. 



Brackish water: Trondhjem! England! Ostend (V. H.), Calvados! Galapagos Islands! 



Var. Leudugeri Temp. a. Br0n (1889). — Broadly lanceolate with obtuse ends. L. 0,o7.5 to 

 0,095; B. 0,03 to 0,037 mm. Striae of the lower V. 6 in 0,oi mm. — Achn. Lnid. D. foss. du 

 Japon p. 9 PL IX f. 11. 



Marine: Japan, fossil (Temp. Br.). 



Var. typica Cl. — Linear with cuneate ends, frequently constricted in the middle. L. 0,0 7 

 to 0,1; B. 0,02 mm. Upper V. with slightly excentric axial area. Strise 7 to 8 in 0,oi mm. 

 coarsely punctate; puncta 7 to 8 in 0,oi mm. forming undulating longitudinal rows. Lower V. 

 with indistinct axial area. Central area a narrow fascia, reaching to the margin. Striae 7 to 9 in 

 0,01 mm. slightly radiate and coarsely punctate. — A. brevipes Ag. Syst. Alg. p. 1. Kutz. Dec. 

 N:o 77, 78 (according to Lagst.) 1833. W. Sm. B. D. II PL XXXVII f. 301. V. H. Syn. p. 129 

 PL XXVI f. 10 to 12. A. salina Kutz. Linnaea 1838 p. 72. 



Brackish water: Arctic America! Greenland! Spitsbergen! Finmark! North Sea! Baltic! 

 Caspian Sea (Grun.), Japan, fossil! Monterey and Mauritius (Grun. forma contracta A. D. p. 19). 



Var. marginata Cl. — Rhomboid-lanceolate, .subacute. L. 0,12; B. 0,0 5 mm. Upper V. with 

 excentric, linear axial area and transverse strise, 7 in 0,oi mm., composed of large quadrate alveoli. 

 Parallel to the margin and close to it, is an elevated line or keel. Connecting zone with longitu- 

 dinal rows of coarse puncta, 6 to 7 in 0,oi mm. 



Marine: Madagascar! 



Var. capensis Cl. — Narrow, linear lanceolate, tapering from the middle. L. 0,o5; B. 0,oi 

 mm. Upper V. with- very excentric axial area and 9 granulate strise in 0,oi mm. Lower V. with 



11 almost parallel striae in 0,oi mm. composed of about 13 puncta in 0,oi mm. 



Marine: Cape of Good Hope! 



Var. subcrenulata Cl. (1891). — Narrow elliptic-linear, obtuse, with crenulated margin. L. 0,04 7 ; 

 B. 0,012 mm. Upper V. with very excentric axial area and parallel strise, 8 in 0,oi mm., com- 

 posed of large puncta (7 to 8 in 0,oi mm.). Lower V. with 11 strise in 0,oi mm. Puncta 11 to 



12 in 0,01 mm. — Diatomiste I p. 50 PL IX f. 5, 6. 



Brackish water: New Guinea! 



Var. intermedia Kutz. (1833). — Linear-elliptical, with rounded ends. L. 0,o3 to O.os; B. 

 0,01 to 0,011 mm. Strise about 10 in 0,oi mm. — Achn. int. Kutz. Dec. N:o 21 (according to 

 Lagst.). Lagst. Ofvers. K. Sv. Vet.-Akad. Forh. X f. ^ a. A. subsessilis Kutz. Dec. N:o 42 (1833) 



K. Sv. Vet. Akadeiniens Handlingar. Hi 27. N:'j 3. <i5 



