538 



EUODIA. 



Section VI. Hemidisce^e. 

 GENUS 189 EUODIA BAILEY, i860. 



Fig. 285. Euodia gibba. 



Valve arcuate, with areolate or punctate structure ; cells often 

 radiant, sometimes more or less fasciculate. Margin often furnished with 

 small pseudo-nodule, more or less developed, sometimes reduced to 

 a sub-hyaline spot. Girdle face cuneate. 



This genus is closely connected with both Eupodiscus and Coscinodiscus ; 

 the cuneate form which is common to this, and the following genus dis- 

 tinguish them from all other approximate genera. It can be further sub- 

 divided into two sub-genera : the Hemidiscus of Wailich, which possesses the 

 pseudo-nodule and a rather fine cellular structure, plainly radiating, and the true 

 Euodia, which are without a pseudo-nodule and have very coarse, more or 

 less scattered puncta. 



In the text is given (fig. 285) Euodia gibba Bail. {Hemidiscus Cuneiformis 

 Walls), which is found in the West Indies, at Ceylon, Zanzibar, &c. 



This genus includes about a dozen species, many of which require further 

 examination. 



GENUS 190. PALMERIA GREV., 1865. 



Fig. 286. Palmeria Hardmaniana . 



