AKT.IO CRETACEOUS FAUFAS OF THE CAROLIN-AS STEPHENSON 23 



Type matet^l. — The type material is in the United States Na- 

 tional Museum and includes the holotype, Cat. No. 73446, and three 

 paratypes, Cat. No. 73447. 



EXPLANATION OF PLATES 



(The specimens figured in Plates 1 to 9 aro from the new Rocky Point quarries, 

 a mile northeast of Rocky Point station, Pender County, N. C, except as 

 otherwise indicated.) 



Plate 1 



Cassidulus kellunii Stephenson (p. 5) 



Fig. 1. Upper surface of the test of the type. U. S. Nat. Mus. Cat. No. 73420. 



2. Lower surface of the test of the type. 



3. Posterior surface of the test of the type. 



4. The apical system of the type, X4. 



5. Diagrammatic view of the apical system, X5, based on one of the para- 



types. 



6. The peristomal area of the type, X2+. 



Plate 2 



Cassidulus Jcellumi Stephenson (p. 5) 



Fig. 1. Anterior surface of the test of one of the paratypes. U. S. Nat. Mus. 

 Cat. No. 73421. 



2. Drawing of the surface of the right side of one of the paratypes. 



3. Lower surface of a typical specimen showing the form and arrangement 



of the plates. U. S. Nat. Mus. Cat. No. 73421. 



4. Diagrammatic representation of the right postero-lateral ambulacrum of 



the specimen shown in Figure 3, X2%. 



Plate 3 

 Cassidulus Jcellumi Stephenson (p. 5) 



Fig. 1. Upper surface of the test of a specimen having an apparently abnormal 

 growth covering the apical system. U. S. Nat. Mus, Cat. No. 73421. 

 2. The peculiar growth covering the apical system of the specimen shown 

 in Figure 1, X4, 



Cassidulus emmonsi Stephenson (p. 7) 



Fig. 3. Upper surface of the test of the type. U. S. Nat. Mus. Cat. No. 73423. 



4. Lower surface of the test of the type. 



5. Posterior surface of the test of the type ; the apparent subcorneal profile 



is due to slight crushing from above. 



6. Upper surface of a typical specimen which has not been distorted by 



crushing. U. S. Nat. Mus. Cat. No. 73424. 



7. Posterior surface of the specimen shown in Figure 6; note the even 



doming of this uncrushed specimen. 



8. Outline profile of the specimen shown in Figure 6, as viewed from the 



right side. 



