KONGL. SV. VI<:T. AKADKMIKNS IlANI)LlN(iAI<. I5ANI) 26. N:() 2. 17 



Var. suhtilis Grun. (1884). — Frustule scarcely constricted. L. 0,o4; B. 0,oi4 mm. Junction- 

 line slightly undulated. Strise 13 (keel) to 26 (valve) in 0,01 mm. V. in B. O.os mm. — A. Jcariana 

 V. snhtUis Grun. Franz Josephs L. 1). p. lOf) (53) P]. 1 f". 52, 53. 



Marine: Franz Josephs Land ((tRUN.). 



Var. striolafa Grun. (1880). — Frustule rectangular, slightly constricted. L. 0,07; M. 0,()2:j, 

 at the constriction (),oi5 mm. Junction-line not sinuose. Stria' 12 (keel) to 15 (valve) in O.di nun. 

 those on the keel ending in small dots. — Grun. A. D. p. (12 PI. IV f. 81. 



Brackish water: Sea of Kara (Grun.). 



8. A. kryophila Cl. (1883). — Frustule slightly constricted. L. 0,i.t to 0,it;; B. 0,04. -s to 

 0,04 Ti; at the constriction 0,o28 to 0,03 nun. Junction-line sinuose. Stri;c on the keel 13 to 17 in 

 0,0 1 mm., ending in small puneta; striae on the valve 10 to 14 in 0,ui mm. wider than on the keel. 

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



Marine: (Jape Wankarema! 



A. Icryopliilu is perhaps not specifically distinct from A. Kjelhiianii, the only difference being 

 that the stri{^e on the keel are closer than those on the valve; otherAA'ise the two forms are perfectly 

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



9. A. lata Grev. (18C3). — Frustule quadrate, strongly constricted. L. 0,075; B. 0,o4, at 

 the con.striction 0,o2 5 mm. Keel broad. Junction-line uniformly arcuate, not sinuose. Strite on 

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

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

 Phil. J. "XVIII p. 38 f 14. — PI. I f. 5. 



Marine: Balearic Islands! Q,ueen.sland (Grev.). 



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

 the number of strise. 



10. A. Menegliiniaiia Grev. (1863). — Fru.stule broad, tpiadrate. L. 0,n.f) mm. Connecting 

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

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



Mai'ine: Queensland (Grev.). 



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

 broad truncate ends. L. 0,08<j to 0,13; B. 0,og6 mm. Junction-line not sinuose. Keel very elevated, 

 bordered with a conspicuose hyaline mai'gin, obsoletely striate, the striae being visible only at the 

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

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



Marine: South Pacific Ocean (Grev.), Senda'i, Japan, fossil (Tempers)! 



12. A. margine-inmctata Cl. N. Sp. — V. in L. 0,i;5; B. 0,o4, at the constriction 0,oi5 mm. 

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

 rows of puneta at the basis of the keel. Lower part of the valve very narrow. Strife 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. 0,05 5, at the 

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

 rows of large puneta (4 in 0,oi ram.), striate; striae 21 in 0,oi mm. V. with fine, scattered puneta. 

 Connecting zone with numerous longitudinal divisions, transversely striate; striae 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. Akudeiiiiens naiHllinKar. Bd 20. N:o 2. 3 



