PLATE XL 



Cyrtoceras (Meloceras) apicale, sp. nOV. 



Fig. 1 a. A nearly perfect specimen covered with the test, but showing at the 

 apex faint marks of the sutures. 1 b. Transverse section of the same. 2 a. 

 Another specimen with only the septate part preserved. 2 6. Ventral view of the 

 same, showing the horizontality of the sutures in this part of the shell. 3. 

 Longitudinal section displaying the siphuncle and the septa, the latter displaced 

 here and there. St. Doulagh's. Dublin Museum of Science and Art. (Page 33.) 



Cyrtoceras (Meloceras) arcuatoseptatum, sp. nov. 



Fig. 4. A polished specimen showing the strongly arched sutures. 5 a. 

 Another specimen with a portion of the body-chamber preserved. 5 b. Transverse 

 section showing the position of the siphuncle. Little Island. Dublin Museum of 

 Science and Art. (Page 37.) 



