808 



PERIDINEAE OF NEW SOUTH WALES, 



Text-fig. 15. 

 Peridinium umbonatum var. ovale, n. var. (a) dorsal view, 

 (b) ventral view, (c, d) two hypo valves, (x 1000). 



posteriorem extensa; tabulis antapiealibus inaequalibus, oblique 

 dispositis. 



Long. 28£-32, lat. 21-28, epiv. alt. 18-22 p.. Guildford (70) ; 

 Lismore (337) . 



Practically an oval form of var. centenniale, thougb not found 

 with it. 



Peridinium intermedium mihi. (Text-fig. 16 a-e). 



Peridinium medium, maxime angulata; fossa transversa fere 

 circulata; membrana glabra. Epivalva quam hypovalva paullo 

 major, angulata, ad apicem fovea distincta instructa; foveas mar- 

 ginibus quasi spinis minutis protractis; tabulis concavis, aequa- 

 toriis 7; apicalibus pentagonis, dorsalibus 3 minoribus, ventrali- 

 bus 2 majoribus. Hypovalva rotundata; fossa longitudinali valde 

 dilatata, usque ad marginem posteriorem extensa; tabulis con- 

 cavis, antapiealibus maxime plerumque (?) inaequalibus, angustis, 

 excavatis . 



Long. 44-46£, lat, 40-42, crass 25 fx. 



Sydney Water Supply (100); Lismore (332). 



Syn. P. tabulatum var. intermedium Playf., op. cit., p. 544, 

 PI. lv., f. 15, 16. A very distinct species this, principally char- 



