KONGL. SV. VET. AKABEMTENS HANDLlNGAn. BAND 26. N:0 2. 17 



Var. suhtilis Grun. (1884). — Frustule scarcely constricted. L. 0,04; B. 0,oi4 mm. Junction- 

 line slightly undulated. Strige 13 (keel) to 26 (valve) in 0,oi mm. V. in B. 0,o8 mm. — A. hariana 

 V. suUilis Grun. Franz Josephs L. D. p. 105 (53) PI. I f. 52, 53. 



Marine: Franz Josephs Land (Grun.). 



Var. striolata Grun. (1880). — Frustule rectangular, slightly constricted. L. 0,07; B. 0,023, 

 at the constriction 0,oi5 mm. Junction-line not sinuose. Strise 12 (keel) to 15 (valve) in 0,oi mm. 

 those on the keel ending in small dots. — Grun. A. D. p. 62 PI. IV f. 81. 



Brackish water: Sea of Kara (Grun.). 



8. A. kryophila Cl. (1883). — Frustule slightly constricted. L. 0,i3 to 0,i6; B. 0,043 to 

 0,045; at the constriction 0,028 to 0,03 mm. Junction-line sinuose. Strise on the keel 13 to 17 in 

 0,01 mm., ending in small puncta; strise on the valve 10 to 14 in 0,oi mm. wider than on the keel. 

 V. lanceolate, with strongly sigmoid median line. — Cl. Vega p. 477 PI. XXXV f. 11. 



Marine: Cape Wankarema! 



A. kryophila is perhaps not specifically distinct from A. Kjellmanii, the only difference being 

 that the strise on the keel are closer than those on the valve; otherwise the two forms are perfectly 

 similar. Both differ from A. paludosa in large size, more strongly silicious valves, and coarser strise. 



9. A. lata Grev. (1863), — Frustule quadrate, strongly constricted. L. 0,075; B. 0,o4, at 

 the constriction 0,0 2 5 mm. Keel broad. Junction-line uniformly arcuate, not sinuose. Strise on 

 the keel 11 to 12 in 0,oi mm. ending in small puncta. Strise on the valve of equal number, not 

 distinctly punctate. Connecting zone with numerous, longitudinal divisions. — Grev. Edinb. N. 

 Phil. J. XVIII p. 38 f. 14. — PL I f. 5. 



Marine: Balearic Islands! Queensland (Grev.). 



The above description is from specimens from the Balearic Islands. GrevilLe does not give 

 the number of strise. 



10. A. Meneghiniana Grev. (1863). — Frustule broad, quadrate. L. 0,ii5 mm. Connecting 

 zone with numerous longitudinal divisions. Junction-line uniformly arcuate, not sinuose. Strise 

 coarse 6 in 0,oi mm. — Grev. Edinb. N. Ph. J. XVIII p. 184 f. 7. 



Marine: Queensland (Grev.). 



11. A. Breblssoniana Grev. (1863). — Frustule strongly siliceous, deeply constricted, with 

 broad truncate ends. L. 0,089 to 0,13; B. 0,066 mm. Junction-line not sinuose. Keel very elevated, 

 bordered with a conspicuose hyaline margin, obsoletely striate, the strise being visible only at the 

 median line and at the junction-line. Strise of the valve 7,5 in 0,oi mm., obscurely but coarsely 

 punctate. — Grev. Edinb. N. Ph. J. XVIII p. 185 f. 8. — PI. I f. 4. 



Marine: South Pacific Ocean (Grev.), Sendai, Japan, fossil (Tbmpere)^ 



12. A. margine-punctata Cl. N. Sp. — V. in L. 0,13; B. 0,o4, at the constriction 0,oi5 mm. 

 Keel very elevated, with a row of small marginal puncta, 8 in 0,oi mm., connected with similar 

 rows of puncta at the basis of the keel. Lower part of the valve very narrow. Strise on the keel 

 19 in 0,01 mm., curved and finely punctate. — PI. I f. 3. 



Marine: Java! 



13. A. Temperei Cl. (1890). — Frustule strongly constricted. L. 0,15; B. 0,055, at the 

 constriction 0,027 mm. Junction-line obsolete, visible only near the central nodule. Keel with two 

 rows of large puncta (4 in 0,oi mm.), striate; strise 21 in 0,oi mm. V. with fine, scattered puncta. 

 Connecting zone with numerous longitudinal divisions, transversely striate; strise 20 inO,oi mm. — 

 Cl. Diatomiste I p. 2 PI. II f. 3. 



Marine: Madagascar! 



This is a very characteristic species, not closely connected with any other. The median line 

 is strongly sigmoid. 



K. Sv. Vet. Akaclemiens Handlingar. Bd 26. N:o 2. 3 



