BY G. I. PLAYFAIR. 



803 



f. 1-3, has indeed the same apical prolongatum of the apex, but 

 this form is ruled off from any connection with it on account of 

 the different arrangement of the plates. Cf. Schilling, I.e., p. 

 41, fig. 45. 



Peridinium geminum, n.sp. (Text-fig. 9). 



Peridinium minutum ad P. caudatum var. guildfordensem 

 valde accedens, glabrum, subglobosum; fossa transversa tenuis. 

 Epivalva crateriformis, fovea subapicali instructa; lateribus 



Text-fig.9. 

 Peridinium geminum, n. sp. 



Text-fig.8. ( x 100 °)- 



Peridin item caudatum 

 var. morsum, n. var. 

 (x 1000). 



asymmetricis, arcuatis; tabulis aequatoriis pentagonis 7; apicali- 

 bus 5 (dorsalibus 3, ventralibus 2) . Hypovalva tenuis, depressa, 

 scutelliformis quam epivalva angustior; tabulis antapicalibus 

 magnis 2, insequalibus, oblique dispositis; fossa longitudinali 

 brevi . 



Long. 20-31, lat. epiv. 18-26, lat. hypov. 16-23, crass. 20-23^. 



Guildford (70) ; Botany (17) . 



Found originally in company with P. caudatum var. guildford- 

 ense, and so named from its marked similarity to that type in 



