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



p. 439 Pl. VI f. 6, 7. Achnanihes infläta GtRUN. A. D. p. 19. Navicula elata Leud. Foutm. D. de 

 Ceylon Pl. III f. 28. Achn. hrevipes var. himidula Gexjn. A. D. p. 19. 



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

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

 Mauritius (Ehb.). 



Var. Smifhiana Grev. (1866). — Ends cuneate. Strise coarser. — ■ Monogramma Smithiana, 

 Grev. t. Bot. Soc. Edinb. Vol. VIII Pl. VI f. 3 to 5. 



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



7. A. brevipes As. (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 

 nodiile transversely dilated into a staiiros, reaching to the margin. Strige slightly radiate. Frus- 

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



Var. parvula KtJTZ. (1844). — Elliptical. L. 0,oi to 0,02; B. 0,00.5 to 0,oo7 mm. Upper V. 

 with 12 to 18 strise in 0, 01 mm. Lower V. with about 15 strise in 0, 01 mm. — A. iMrviila KtJTZ- 

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

 chypus MoNT. Ann. Se. nat. (2) T. VIII p. 348 (accord. to Klitz.). KtJTZ. Bac. p. 76 Pl. XXI f. 2. 



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



Var. Leuduc/eri Temp. a. Brun (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. Leud. 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. O, o 7 

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

 coar.^iely punctate; puncta 7 to 8 in 0, 01 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 As. Syst. Alg. p. 1. Kutz. Dec. 

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

 Pl. XXVI f. 10 to 12. A. salina Kutz. Linneea 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. marcjinata Cl. — Rhomboid-lanceolate, subacute. L. 0,12; B. O, o 5 mm. Upper V. with 

 excentric, linear axial area and transverse strise, 7 in 0,oi mm., composed of 1 arge 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, 01 mm. 



Marine: Madagascar! 



Var. capensis Cl. — Narrow, linear lanceolate, tapering from the middle. L. 0,05; B. 0,oi 

 mm. Upper V. with very excentric axial area and 9 granulate strise in 0, 01 mm. Lower V. with 



11 almost parallel striee in 0, 01 mm. composed of about 13 puncta in 0, 01 mm. 



Marine: Cape of Good Hope! 



Var. siihcrenulata Cl. (1891). — Narrow elliptic-linear, obtuse, with crenulated margin. L. 0,047; 

 B. 0,ni2 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. infermedia Kutz. (1833). — Linear-elliptical, with rounded ends. L. 0,03 to 0,or>; B. 

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

 Lag,st.). Lägst. Öfvers. K. Sv. Vet.-Akad. Förh. X f. 2 a. A. subsessiUs KiJTZ. Dec. N:o 42 (1833) 



K. Sv. Vet. Akddcmiens Handlingar. Bd 27. N;o 3. 25 



