PLATE XIX. 



PENTACEROS CORONATUS, Forbes, sp. (Page 82). 



From the Loioer Challc. 



FIG. 



1. Abactinal aspect; natural size. (Coll. Brit. Mus., E. 2562.) 



a. Lateral view of arm ; natural size. 



METOPASTER PARKINSONI, Forbes, sp. (Page 31.) 

 From the Upper Chalk. 



2. Actinal aspect; natural size. (Coll. Brit. Mus., E. 5027.) 



a. Lateral view ; natural size. 



b. Ventro-lateral plate ; magnified 5 diameters, showing entrenched pedicellaria. 



c. Supero-marginal plate ; magnified 3 diameters. 



NYMPHASTER COOMBII, Forbes, sp. (Page 15.) 

 From the Upper Greensand. 



3. Actinal aspect ; natural size. (Coll. Brit. Mus., 48620.) 



