O'Meara — Report on the Irish Diatomacece. 397 



Var. forficula, (O'iteara). ilaiine. 



Yalve elliptical, median compartment as in the tjrpical species ; 

 ■compartments at either side very much narrower ; marginal striate 

 band wide,, projecting towards the central nodule; inner margin bilu- 

 nate ; strise radiate, costate, with obscui'e moniliform striae interposed, 

 the costa) only penetrating the contiguous compartment ; length 

 •0023, breadth -0014. (Plate 33, fig. lo") 



Schmidt, Atlas der Diat., T. viii., fig. 3. — Pinnularia forficula, 

 O'Meara, Q. J. M. S., 1867, p. 117, PI. v., fig. 9. 



Arran Islands, Co. Galway. 



Var. paria. (Schmidt). lEarine. 



Yalve linear, elliptical ; median compartment narrow, inflexed at 

 the ends, slightly constricted in the middle ; compartment at either 

 side very nan-ow, bilunate ; marginal striate band broad, bilunate on 

 the inner margin; strife fine, linear, nearly parallel throughout; 

 length -0014, breadth -0008. 

 - Schmidt, Atlas der Diat., T. viii., figs. 1 and 2. 



Stomachs of Ascidians, Broadhavcn Bay, Co. Galway. 



jSfavicula coffeiformis, (Schmidt). Marine. 



Yalve small, broadly elliptical ; median compartment narrow, in- 

 flexed at the ends, slightly constricted in the middle ; compartments 

 on either side narrow ; median striate band relatively wide ; strise fine, 

 linear, slightly radiate; length '0010, breadth -0005. (Plate 33^ 



fig- IS-) . 



Schmidt, Atlas der Diat., T. viii., fig. 7. 



Arran Islands, Co. Galway. 



f f Valve constricted to the middle. 



JSfavicula eudoxia, (Schmidt). Marine. 



Yalve elliptical, slightly constricted, ends broadly rounded ; median 

 compartment narrow, inflexed at the ends, slightly constricted in the 

 middle ; compartments at either side narrow, striate ; striae linear, 

 nearly parallel and very faint ; marginal striate band narrow ; striae 

 linear, slightly convergent in the middle, slightly radiate towards 

 the ends; length -0016, breadth at the constriction -0007, greatest 

 breadth -0008. (Plate 33, fig. 19.) 



Schmidt, Atlas der Diat., T. viii., fig. 19. 



Stomachs of Ascidians, Broadhaven Bay, Co. Galway. 



2U2 



