xili. FOSSILS OF THE PERIOD. 331 



Pholadomya aequalia. Sow. K. C. Wotton-Basset. 

 insequalis. n. s. Phil. P. R. Shotover. 



rustica. n. s. Phil. K. C. Wotton-Basset. P.R. Shotover. 

 Pholas coinpressa. Sow. K. C. Shotover. 

 Tancredia tumida. P. R. Shotover, Hartwell. 



Thracia depressa. Sow. K. C. 1., m., u. Culham, HartweU, Shotover. P. R. Brill. 

 Trigonia gibbosa. Sow. P. R. Shotover, Brill, Swindon. 



incurva. Sow. P. R. Brill, Swindon. 

 Xylophaga. P. R. Shotover. 



v , > 



Few of these species are really very characteristic of this upper 

 stage of the oolites. Trigonia gibbosa and Cardium dissimile mark 

 the Portland rock, while Astarte Hartwellensis and Cardium 

 striatulum belong to the upper part of the Kimmeridge clay. In 

 this upper part at Wheatley the railway-cutting disclosed sand- 

 stone beds with fossils, some of them also found in the Portland 

 rock above. 



GASTEKOPODA. 



Alaria. sp. P. R. Shotover. 



Buccinum naticoideum. Sow. P. R. Brill, Swindon. 



Cerithium concavum. Sow. P. R. Tisbury, Wilts. 



Portlandicum. Sow, P. R. Swindon, Shotover. 

 Chemnitzia gigantea. Leym. K. C. Wotton-Basset. 



Heddingtonensis. Sow. K. C. Wotton-Basset. 

 inflata. n. s. Phil. Shotover. 

 Littorina muricata. Sow. K. C. Wotton-Basset. 



paucisulcata. n. s. Phil. Shotover. 

 Natica elegans. Sow. P.R. Shotover. 

 Neritoma sinuosa. Sow. P. R. Swindon, Brill. 

 Phasianella striata. Sow. K. C. Wotton-Basset. 

 Pleurotomaria depressa. K. C. Shotover. 



,, reticulata. Sow. K. C. Shotover, Swindon. 



rugata. JBenett. P. R. Swindon, Shotover. 



In this scanty list of gasteropoda some species are marked in 

 Kimmeridge clay which are more frequent in the subjacent oolites. 

 They mostly occur in the lower part of the clay at Wotton-Basset, 

 where they were collected for the National Geological Survey. 



CEPHALOPODA. 



Ammonites biplex. Sow. K. C. Nuneham. P. R. Swindon. 

 decipiens. Sow. K. C. Shotover. 



Eumelus. D'Orb. K. C. Shotover. 

 giganteus. Sow. P. R. Swindon. 

 gigas. Ziet. P. R. Aylesbury. 



Hector. D'Orb. K. C. u. Wheatley Cutting. P. R. Shotover. 

 pectinatus. n. s. P. R. Shotover. 

 rotundus. Sow. K. C; Aylesbury. 



