EXTRA-BRITISH ASTEROIDEA. Ill 



" Dimensions. — Diameter of disc 6 mm. Leng-th of arm 20 mm. Width of 

 arm near disc L25 mm." 



Remarks. — The figures given and dimensions of this species appear to me to 

 indicate that it closely resembles Ophiotitanos Isevis. The upper arm-plates are 

 described as hexagonal, and the more proximal upper arm-plates of the British 

 species present this appearance. 



Locality and Stratigraphical Position. — Cretaceous, Fort Ellis, Montana. 



OpmoGLYrHA texana, Glarl; 1892. 'Bull. U.S. Geol. Survey,' no. 97, p. 30. 



" Determinative Characters. — Disc round ; composition indistinct. Arms long, 

 with wedge-shaped under arm-plates about as wide as long; upper arm-plates 

 about twice as wide as long. 



" Dimensions. — Diameter of disc 15 mm. Length of arm 50 mm. Width of 

 arm at disc 2 mm." 



Bemads. — It is difficult to identify this with a British species, but the illus- 

 trations appear to indicate that it is somewhat similar to Amphhira cretacea. 



Locality and Stratigraphical Position. — Cretaceous, six miles north of Fort 

 Worth. 



OriiiuitA granulosa, Uoemer, 1841. 'Die Verstein. norddeutsch. Kreidegeb.,' p. 



28, pi. vi, fig. 22. 



This species is described as follows : 



" Die Arme sind walsenformig und bestehen aus gewolbten, seitlich durch em 

 Furche getrennten, deutlich gekornten Seitenschildchen ; wo sich deren vier 

 beruhren liegt ein kleines, dreieckiges Schildchen dazwischen." 



Remarks. — The small fragment of the arm figured shows it to be a portion 

 of the distal extremity — quite possibly the distal extremity of some species of 

 Ophiotitanos. 



Locality and Stratigraphical Position. — Lower Chalk, Lindener Berg, near 

 Hanover. 



