161 

 17- L. bastata vcir. clavata Mer. [fig. u]. 



Valve strongly davate, with upper part very inflated, in other 

 respects not differing from the type species. Length o.o35-o.i29 

 mm., breadth of the valve 0.0095-0.012 mm. (average 0.0114 mm.). 



Locality: Black sea (lalta, Crimea), common, mixed with the type. 



This variety shows the characteristics of /.. hastaia developped 

 in its extreme; it is connected with the latter by ali intermediate 

 forms. The strong intlation of the upper part of the valve gives to 

 this Licmophora a very peculiar appearance. 



18. L. inflata Mer. [fìg. 12]. 



Valve narrow, davate, with the upper haif inllated, abruptly at- 

 tenuated in the middle, becoming gradually very narrow, inferior 

 apex acute, upper end attenuated, usually slightly produced, supe- 

 rior apex broad, truncate. Pseudoraphe and striae very fine. Girdle 

 face very narrow, linear cuneate, sometimes cuneate, upper angles 

 slightly rounded. Septa not profound (o.oo256 mm.), thin, rather 

 strongly bent near the superior apex of the frustule (as in L. U- 

 nuis\ septal puncta small but distinct, round. Length 0.0Ó7-0.085 

 mm., breadth of the frustule 0.007Ó-0.013 mm., breadth of the valve 

 0.0005-0.0067 mm. 



Locality : Black sea (Sebastopol), rare ! Adriatic (Pola), rare. 



This species is nearly allied to Z. debilis from which it mainly 

 differs by the broad truncate upper end of the valve which in L. 

 debilis is narrow and acute; the girdle face is also narrower and the 

 size larger and more uniform. 



19. L. inflata var. intermedia Mer. 



Valve variable as to the form, more or less attenuated towards 

 the summit, superior apex truncate, rounded, rarely acute, becoming 

 considerably but gradually narrower towards the lower end, which 

 is very narrow, acute, margins straight. Pseudoraphe and striae very 



