818 PERIDINEAE OF NEW SOUTH WALES. 



Var. major, n. var. (Text- fig. 18 c, d) . 



Forma duplo major, ovalis vel ovata; membrana erasse scro- 

 biculata. A latere visa lineari-elliptica, haud curvata, apicibus 

 rotundatis . 



Long. 48-52, lat. 36-38 p.. Botany (109) . 



A much rarer form almost double in length to the usual speci- 

 mens commonly found here. Such ,as I noted were linear- 

 elliptic in side view, not curved, with rounded ends. Membrane 

 coarsely scrobiculate on the inside. 



EXPLANATION OF PLATES XLI.-XLIII. 



All figures x 660, unless otherwise specified; (a) dorsal view, (b) vent- 

 ral view, (c) epivalve, fdj hypovalve. 



Plate xli. 

 Fig. 1. — Peridinium striolatum, n. sp. 



Fig. 2. — ,, ,, var. rugosum, n. var., (r) hypovalve. 



Fig. 3. — ,, Willeiv&v. botanicum, n. var., (d, e) two types 



of hypovalve. 

 Fig. 4. — Peridinium australe mihi, from Brisbane. 



Plate xlii. 

 Fig. 1. — Peridinium striolatum var. truncatmn, n. var., dorsal view. 

 Fig. 2. — ,, ,, ,, another specimen, 



ventral view. 



Fig. 3. — Peridinium ,, var. rugosum, n. var., (6) hypovalve. 



Fig. 4. — ,, ,, var. acuminatum, n. var. 



Fig. 5. — ,, ,, var. auburnense, n. var. 



Fig. 6. — ,, ,, ,, another specimen, ventral view. 



Fig. 7. — ,, ,, ,, scalariform markings, greatly 



enlarged. 

 Fig. 8. — Peridinium australe mihi, from Sydney; (b) epivalve, (<r) usual 



hypovalve, (d) unusual hypovalve with intercalated plates. 

 Fig. 9. — Peridinium zonal um mihi, rare form of hypovalve with 



intercalated plates. 



Plate xliii. 

 Fig. 1. — Peridinium granulosum mibi, from Sydney, (r) hypovalve 



(x 500). 

 Fig. 2. — Peridinium ,, from Brisbane, (c) hypovalve. 



Fig. 3.— ,, zonatum mihi, (d) hypovalve (x 500). 

 Fig. 4. — ,, hieroglyphicum var. ovatum, n. var., dorsal view. 

 Fig. 5. — ,, ,, ,, another form, ventral view. 



Fig. 6. — ,, ,, var. rotundum, n. var. 



