1S4: MR. C. EEID AXD ME. J. GEOTES OX THE [vol. Ixxvii^ 



Var. EHYTiDOC.iEPA iiov. Cellulie spirales emiiientias iDsecjuales 

 et angulatas praetendentes. (PI. IV, fig. 3.) 



\a.Y. MixoE nov. Oogonium cuiii coniormatione formie typicae 

 simili sed minus, diametro c. 7-jO-S.jO^<. (PI. IV, fig. 2.) 



The fruits varv in colour from light Yellowish to dark pui-plish- 

 brown. When fully developed the spiral cells are convex ; they 

 are often much swollen at the apex, which is often a lighter brown, 

 and the constriction at the neck is verv marked. The form of the 

 fruit differs from that of any living Charophyte, in that the breadth 

 is often greater than the length. It may be conjectured that the 

 plant belonged to a genus akin to Xitellopsis. 



If not identical with C. medicagi)inlal:^i'OYig\\mYi, as suggested 

 by J. W. Salter {oj). cif.), there is uo doubt that C. Wrigliiii is yery 

 closely allied to that species. The size of the fruits of the former 

 given by W. Ph. Schimper, in his ' Traite de Paleontologie Veo-e- 

 tale ■ yoi. i (1869) p. 221 (1100-1150 /i), is somewhat greater than 

 that of the Hordle plant. AVe have not had sufficient opportunity 

 of examining the remains from the Paris Basin to form an opinion 

 as to their identity. 



The var. minor of C. JJ^rigliiii bears about the same proportion 

 in size to the type as the var. minor of C. medicaginula. The 

 form rliijiidocarpa may be merely an abnormality ; but we haye 

 seen similar specimens from the Lower Headon Beds of the Isle 

 of Wight. 



In the Basement (Seed) -Bed a number of the oospores are 

 preserved within the oogonia ; but, being yery thin -shelled and 

 brittle, they are difficult to handle. We have, however, been able 

 to get out three specimens nearly entire, and from this rather 

 meagre material the aboye description is drawn. A nearly globose 

 oospore from the Limestone-Band, filled with the m.atrix, probably 

 also belongs to this species. This is shown in PL IV, fig. 11. 



C. IVriglifii is the commonest Charophyte in the Hordle Beds, 

 sometimes occurrino- in o-reat numbers. It was obtained fi'om the 

 Mammal-Bed, the Basement (Seed) -Bed, the Limestone-Band. 

 the Rodent-Bed. and the Mineway. 



2. CllAEA CJELATA, Sp. UOY. (PL IV, figS. 4-6.) 



Oogonium fere globosum, diametro c. 9-50^; celluls> spirales 

 labissimae (c. 150-175 /^i) cum ordine tuberculorum rotundato-coni- 

 corum. apice turgescente, circa septem conyolutiones exhibentes : 

 foramen basilare angustum, ore paulo dilato. 



Var. BicixcTA. Cellulae spirales ordine tuberculorum irregulariter 

 duplicato. (PL IV, figs. 7 & 8.) 



Var. BAG' CAT A. Oogonium subglobosum quam idem formse 

 typicae minus, diametro c. 850 ; tuberculi magni humiles rotundati ; 

 foramen basilare latius. (PL IV, figs. 9 &-10.) 



In shape the fruit of this species resembles that of C. JVrighfii, 

 but it is less flattened at the extremities. In some cases, as in 

 those figured, the tubercles are particularly well-marked; in the 



