PLATE XXVIII. 



Ophiotitanos tenuis, n. sp. (Page 104.) 



From the Lamer Chalk. 

 Pig. 



1. Abactinal aspect of type specimen; natural size. (Coll. Brit. Mus., E. 5056.) 

 a. Abactinal aspect of a segment of disc and two arms ; magnified 8 diameters 



(.slightly restored). 



2. Actinal aspect of another example ; natural size. (Coll. Brit. Mus., E. 5057.) 

 a. Actinal aspect of a segment of disc and two arms; magnified 8 diameters 



(slightly restored). 



Ophiotitanos l.kvis, n. sp. (Page 105.) 

 From the Lower Chalk. 



3. Abactinal aspect ; natural size. (Coll. Brit. Mus., E. 5053.) 



a. Abactinal aspect of a segment of disc and two arms; magnified 8 diameters 



(slightly restored). 

 •1. Abactinal aspect of another small example. (Coll. Brit. Mus., E. 5058.) 

 a. Abactinal aspect of a segment of disc and one arm ; magnified 10 diameters 



(slightly restored). 



Ophiotitanos magnus, n. sp. (Page 106.) 

 From the Lower Chalk. 



5. Actinal aspect of type specimen ; natural size. (Coll. Brit. Mus., E. 5060.) 

 a. Actinal aspect of portion of arm; magnified 4 diameters (slightly restored). 



Amphitjra cretacea, n. sp. (Page 107.) 

 From the Lower Chalk. 



6. Actinal aspect of type specimen; natural size. (Coll. Brit. Mus., E. 5059.) 



a. Actinal aspect of a segment of disc and two arms; magnified 10 diameters 

 (slightly restored). 



