PLATE VII. 



Orthoceras Clanense, a. H. Foord. 



Figs. 1 a, 1 h. Specimen showing body-chamber and a considerable portion of 

 the septate part of the shell. 1 b. The lower part of 1 «. 1 c. Another specimen, 

 showing the oblique septa and the fine stride at the upper part. 1 d. Transverse 

 section of the same. 1 e. Portion of the test of the same, greatly magnified, 

 showing the imbricating character of the stride. 1/. The same, somewhat 

 diagrammatic. 1 g. Apical portion of another individual, showing the beaded 

 siphuncle of the young shell. Claue. Dublin Museum of Science and Art. 

 (Page 21.) 



