PLATE XL. 



Peeicyclus Bailti, G. C. Crick. 



Fig. 1 a. Lateral view of the type specimen in which the inner whorls are concealed in the matrix. 

 16. Front view of the same, showing the ribbing. St. Doulagh's. British Museum (No. C. 298). 

 (Page 147.) 



Fio-. 2 a. Lateral view of a smaller specimen in which the inner whorls are all exposed to view. 

 From a drawing by the author. 2 b. Front view of the same. St. Doulagh's. Woodwardian Museum, 

 Cambridge (No. 439). (Page 147.) 



Fig. 3. Suture-line from a specimen formei-ly in the author's possession ; reproduced from Mr. 

 Crick's figure in the ' Ann. Mag. Nat. Hist.,' ser. 7, vol. iii, 1899, p. 439, fig. 7. St. Doulagh's. 

 (Page 147.) 



Peeicyclus eotulifoemis, G. C. Crick. 



Fig. 4 a. Lateral view of the type specimen, with eroded fragments of the test adhering to the 

 cast. 4 b. Front view of the same, showing two constrictions. St. Doulagh's. Dublin Museum of 

 Science and Art. (Page 148.) 



Fig. 5. Lateral view of a specimen, showing the inner whorls, with nodes. From a drawing by the 

 author. St. Doulagh's. Woodwardian Museum, Cambridge (No. 411). (Page 148.) 



Fig. G. Peripheral view of a somewhat thicker individual than 4 a, showing the characteristic 

 constrictions very strongly marked upon the cast. St. Doulagh's. Dublin Museiim of Science and 

 Art. (Page 148.) 



Fig. 7. Suture-line of an imperfect individual. From a drawing by the author. Gleubane. 

 Dublin Museum of Science and Art (G-eological Survey Collection — No. 716 C). (Page 148.) 



