PLATE X. 

 Agtinoorinus (Saucocrinus) semiradiatus, Hall. 



Page 370. 

 Fig. 1. In internal cast of a specimen of this species, showing the characters as described. 



RbODOCRINUS ? RECTUS, HaLL. 

 Page 368. 



Fig. 2. View of an interior cast, presenting one of the interradial areas, and two of the radial 

 series. 



Glyptaster occidentalism Hall. 



Page 369. 

 Fig. 3. Lateral view of a well preserved cast of this species. 



Glyptaster pentangularis. Hall. 



Page 369. 

 Fig. 4. An internal cast of this species, preserving the impressions of the plates. 



Melogrinus verneuili, Troost. 



Page 372. 



Fig. 5. An internal cast of this species. The constriction between the arms is not quite so deep 

 as in some examples. 



Lampterocrinus inflatus, Hall. 



Page 37-1. 



Fig. 6. Lateral view of a well preserved cast of this species, which preserves the markings of 

 the plates in an unusual degree. 



Macrostylocrinus striatus, Hall. 



Page 371. 



Fig. 7. External characters of this species, taken from a gutta-percha cast in the natural mould. 

 " 8. The internal cast of the same individual. 



Glyptocrinus nobilis. Hall. 



Page 372. 



Fig. 9. A view of the external surface as obtained from an impression in the natural mould. 

 " 10. Lateral view of an internal cast of this species. The base has been broken off. 



Glyptocrinus armosus, M' Cmesnby. 



Page 373. 



Fig. 11. Lateral view of an unusually well preserved internal cast, on which the boundaries of 

 the plates are well marked. The similarity in general form between this species and 

 G. nobilis is very remarkable, the conspicuous difference in the cast being the strong 

 elevated proboscis in the latter ; while in the former the organ occupying this position 

 curves backwards, lying close upon the summit, and is directed downwards to the 

 line of the arm-bases. 



