KONGL. SV. VKT. AKA1)P:MIKNS HANDLINGAH. HAND 27. N:0 3. 141 



This characteristic form is hut inipcrfcctly known, as no valves in a t'avoiirahle position 

 have heen examined. It seems impossihh' to find a place for this species in any of the abov^e sub- 

 genera, the nature of the striation being entirely different, and closely similar to that of the 

 Lineolatu: of Navicula, of which section it might be an asymmetrical form. 



9. A. Nniimimni ,Ian. (l.S7(i). — Frustule sublinear, with slightly rostrate ends. L. 0,0.^; 

 B. 0,0 li mm., bordered with a narrow limbus. Zone on the dorsal side with two rows of puncta. 

 V. narrow; its dorsal side with about KJ striic in (),oi mm. Ventral side smooth with a longitu- 

 dinal line. — A. S. Atl. XXXIX f. 19. 



Marine:? 



It is impossible to decide the position of this form, which I know only from the figs, in 

 Atl. representing entire frustules. It may be akin to A. piisilla Cl. or to A. Wittstcinii. 



Amphorce placed in the other (/en era. 

 A. Digitus A. S., Finnularia anihi(jHa, Cl. 

 A. miviculacea Donk., Pinnularia Stauntonii Grun. 



Doubtful, or imperfectly known, Amphorte. 



A. acuta var. neogcna Pant. (Ill PI. XII f. 187 1893); belongs to the subgenus Oxijamphora. 



A. aniphioxys Bail. (Smiths. Contr. 1852 p. 39 PI. II f. 20 to 22) is according to Hamilton 

 Smith Hantzschia amphioxys, which appears to be beyond doubt. 



A. andesitica Pant. (Ill PI. XIII f. 205; 1893). 



A. Argus Pant. (Ill PI. XXII f. 329; 1893) seems to be akin to .1. ovalis. 



A. Beccarii. De Notaris (Exb. Crit. ital. Ser. II N:o 633) unknown to the author. 



A. hudaxjaua Pant. (Ill PI. XXIII f. 336). 



A. bullosa. FioR. Mazz. (Atti. Soc. crit. ital. 1879 p. 104. Golletonona hullosum Fior. Mazz. 

 Atti. Acad. Pont. N. Lincei 1861 PI. I fig. 1 — 5) unknown to the author, not having seen the 

 original paper. 



A. cingulata Pant. (II PL XXV f. 369; 1889) is an indeterminable fragment of some diatom. 



A. coarctatn Leud. Fortm. (D. de Ceylon PL II f. 18; 1879) impossible to identify. 



A. cristata Petit (U. de Campbell p. 18 PL IV f. 8; 1877) is unknown to me, but seems 

 to be a remarkable species, which however is too imperfectly figured and described to decide as 

 to its place in the system. 



A. eunoticeformis Grun. (A. S. Atl. XXXIX f. 5) seems to be a Navicula akin to Kav. 

 rhomhica. 



A. invidenda Pant. (Ill PL XIV f. 210; 1893). 



A. Kossuthii Pant. (Ill PL X f. 169; 1893). 



A. lutea Leud. Fortm. (D. de Ceylon PL I f. 10; 1879) an indeterminable connecting zone 

 of some diatom. 



A. vnmda A. S. (Atl. XL f. 15; 1876) no Amphora, but a frustule of a Tropidoneis, akin 

 to T. Lepidoptera. 



A. naviformis Leud. Fortm. (D. de Malaisie PL If. 6; 1892) probably Hantzschia marina. 



A. ohtccta Bail. (H. L. Smith Lens p. 77 PL II f. 12) cannot be identified. Possibly a form 

 of A. Grecillcana. 



A. obtusiuscula Grun. (A. S. Atl. XXV f. 7; 1875) seems to be a Navicula of the section 

 Fusi formes. 



A. rectangularis Greg. (T. M. S. 1857 p. 70 PL I f. 29) represents in Hamilton Smiths opi- 

 nion, in which I agree, some Stauroneis. 



A. rimosa Ehb. (Am. p. 79; 1843; M. G. V: i f. 27). 



A. Schmidtii Petit (Campbell D. p. 17 A. S. Atl. XXVII f. 51). 



