PLATE XXI. 

 Aphkleceras MUTABiLE, F. M'Coy, sp. 



Fig. 1 a. Lateral view of an imperfect specimen. 1 h. Peripheral view of the 

 same, showing the lines of growth. Somewhat reduced in size. Kiidare 

 (probably Clane). British Museum (No. C. 134). (Page 65.) 



Fig. 2 a. Transverse section of whorl of another specimen, showing position 

 of siphuncle. 2 b. Part of inner whorl of the same, showing fine longitudinal 

 lines. 2 c. Part of initial whorl of the same. Clane. Dublin Museum of Science 

 and Art. (Page 65.) 



Fig. 3. Polished section, showing the septa and siphuncle. Clane. Dublin 

 Museum of Science and Art. (Page 65.) 



Apheleceras hibernicum, a. H. Foord and G. G. Grick, sp. 



Fig. 4 a. Lateral aspect of a nearly perfect specimen (figured ' Geological 

 Magazine,' loc. cit.). 4 5. Peripheral aspect of the same. 4 c, 4cZ. Details of the 

 ornamentation somewhat enlarged : 4 c, that of the periphery ; 4 d, that of part 

 of the inner whorl at the bend near the apex. St. Doulagh's. British Museum. 

 (Page 68.) 



Fig. 5. Lateral view of a nearly perfect specimen, with the ornamentation 

 completely preserved. St. Doulagh's. Dublin Museum of Science and Art. 

 (Page 68.) 



Fig. 6. Fragment of another individual, polished to show the septation. 

 St. Doulagh's. Dublin Museum of Science and Art. (Page 68.) 



Fig. 7 a. Fragment of the body-chamber of a large individual, with a con- 

 siderable part of the test, well preserved and showing fine lines of growth, which 

 become coarser near the aperture (top of figure). 7 h. Lower extremity of the 

 same, showing the position of the siphuncle. St. Doulagh's. British Museum. 

 (Page 68.) 



Vbstinautilus CARiNiPERus, /. de G. Sowerhy, sp. ; var. magnicameratus, var. nov. 



Fig. 8. Peripheral view of a distorted specimen, showing the wide septation 

 (cf. Plate XXIII, fig. 2). Limerick (exact locality unknown, probably near the 

 city). Dublin Museum of Science and Art. (Page 84.) 



