PLATE XLVI. 



Gltphioceras (s.-g. Beteichoceeas) difficile, sp. nov. 



Fig. 1 a. Lateral view of the niucli eroded and distorted type siiecimen, which is entirely septate. 

 1 6. Peripheral view, showing that one half of the shell has been shifted sideways across the other. 

 1 c. Sutnre-lines, well shown also in 1 a. Lisuakerry. Dublin Museum of Science and Art 

 (Geological Survey Collection). (Page 171.) 



Gltphioceras (s.-g. Beteichoceeas) sdbquadeatum, sp. nov. 



Fig. 2 a. Lateral view of a distorted specimen. 2 6. Peripheral view of the same, showing 

 truncation. 2 c. Suture-liues. Little Island. Mr. Joseph "Wright's Collection. (Page 172.) 



Gltphioceras (s.-g. Beteichoceeas) sPH.a:EOiDALE? F. M'Coi/, sp. 



Fig. 3 a. Lateral view of a somewhat distorted specimen. 3 6. Front view of the same. KilmaUock. 

 Dublin Museum of Science and Art (" Griffith Collection"). (Page 173.) 



Fig. 5 a. Lateral view of a younger undistorted individual, supposed to belong to this species, 

 showing the ornaments of the test. 5 b. Front view of the same. The left-hand sigmoid line at the 

 bottom of fig. 5 a is only a fracture. Ballynacarriga. Dublin Museum of Scienc<' and Art (Geological 

 Survey Collectiou— No. 255). (Page 173.) 



Gltphioceeas (s.-g. Beyeichoceeas) Beowni? F. M'Coy, sp. 



Fig. 4 a. Peripheral view of a distorted specimen. 4 b. Lateral view of the same, showing the very 

 large umbilicus. 4 c. Suture-lines, in which the peripheral lobe is not preserved. (The septate part 

 of the specimen is filled with crystalline calcite, the deposition of which appears to have destroyed the 

 inner whorls.) County of Limerick. Dublin Museum of Science and Art (" Griffith Collection "). 

 (Page 175.) 



Peeicvclus Leesoni, G. C. Crick, sp. 



Fig. 6 a. Front view of the type specimen. 6 b. Lateral view of the same. (5 c. Suture-line of 

 the same, imperfect. Gleubane East. Dublin INIuseum of Science and Art (Geological Survey 

 Collection). (Page 153.) 



