O'Meara — Bejwrf on the Irish Biatomacecc . 269 



I have had considerable difficiilty iu identifying this species ; in 

 some respects it agxees with the description of Eupodiscus sparsus, 

 Grreg., Q,. J. M. S., 1856, p. 81, PI. i., fig. 47. But as it more nearly 

 resembles specimens frequently to be met "udth in the Richmond 

 deposit, ■u'hich Ealfs seems to hare had in view when he named the 

 species, I have adopted his specific designation. 



Ealfs, in Pritch., p. 834. 



Salt ditch near "VTexford. Sea-weeds, Ballybrack, Co. Dublin. 



Actinocyclus crassus, (^m. Sm.) ilarine. 



Striae monilif onn ; principal rays strongly marked when viewed by 

 a low power; arrangement of puncta somewhat confused; border 

 narrow, punctate, puncta decussate ; submarginal nodule small ; dia- 

 meter -0020. 



Ealfs, in Pritch., p. 83.3. — Eupodiscus crassus, 'Wm. Sm., B.D., 

 Yol. i., p. 24, PI. iv., fig. 41. 



Sea-weeds, Ballybrack. Stomachs of Pectens, Dalkey Sound, 

 Malahide, Howth, Co. Dublin. Stomachs of Ascidians, Co. Clare. 



Actinocyclus fulvui, ("Wm. Sm.) Marine. 



Striffi moniliform, close, subradiate ; border broad ; striation indis- 

 tiact ; submarginal nodule small. Diameter about '0025. 



Ealfs, in Pritch., p. 835. — Eupodiscus fulvus, "Wm. Sm., B.D., 

 Yol. i., p. 24, PL iv., fig. 40. 



Stomachs of Pectens, Dalkey Sound, Co. DubKn. Stomachs of 

 Ascidians, Eoundstone Bay, Co Galway. 



Genus XII. Eupodiscus, Ehr. 

 Yalyes having horn-like processes springing from the surface. 



JEtipodisciis argics, (Ehr.) Marine. 



Disk large, areolate ; areoles irregular, somewhat angular, radiately 

 disposed ; processes three or four, submarginal. Diameter from -0065 

 to -0120. (PL 27, fig. 3.) 



Wm. Sm., B.D., Yol. i., p. 24, PL iv., fig. 39. Ealfs, in Pritch., 

 p. 843, Pis. vi., fig: 2, and xi:, figs; 41, 42: Heiberg, De Danske 

 Diat., p: 37: Eab. EL Eui\, sect, i., p. 319. — Tripodiscus argus, 

 Kiitz. Bac, p. 136, T. i., fig. 6. 



Dublin Bay. 



2 M2 



