PLATE YIIL' 



Okthocehas Soi,lasi, a. IT. Foord. 



Fig. 1 (/, Specimen sliowing the bodv-chamber and the greater part of the 

 septate portion of the shell. (Note the crescentic depression at the anterior end of 

 the body-chamber just below the margin of the aperture.) 1 b. Transverse section 

 with sinhuncle. I c. Portion of the test showing the striae, natural size. 1 d. 

 Figure of the striae (somewhat diagrammatic), enlarged to show bifurcations. 1 e. 

 Another specimen, somewhat more complete than 1 a, showing the septa where 

 the test is removed; the slight constriction near the aperture is well seen. ] /'. 

 Longitudinal section showing septation and a fragment of the siphuncle. Clane. 

 Dublin Museum of Science and Art. (Page 23.) 



Okthockuas MULTrsTKiATUM, ^-1. H. Foovd. 



Fig. '2 a. Fragment with body-chamber and a good deal of the septate part of 

 the shell. 2 h. Longitudinal section showing the septa and siphuncle. Little 

 Island. Dublin Museum of Science and Art. (P;^ge 2-i.) 



OuTHOCEliAS PEl!EI,LirTICUM, A. H. FoOvd. 



Fig. o (r Fragment of the septate part of a s|)ecimen. o /;. Transverse section 

 showing siphuncle. 3 c. Imbricating strife greatly enlarged. Little Island. 

 Museum of Queen's College, Cork. (Page 25.) 



Ol.'THOCERAS PERCOXICUM, A. H. FoOvd. 



Fig. 4 ((. Fragment showing the greater part of the body-chamber and some 

 of the septa. 4 b. Transverse section, the siphuncle not preserved. Clane. 

 Dublin Museum of Science and Art. (Page 27.) 



1 All the figures in this anil tlie following Plates represent the specimens of the natural size unless 

 tlie contrary is stated. 



