EXTRA-BRITISH ASTEROIDEA. Ill 



"Dimensions. Diameter of disc 6 mm. Length of arm 20 mm. Width of 

 arm near disc 1'25 mm." 



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

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

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

 species present this appearance. 



Locality and Stratigraphiccd Position. Cretaceous, Fort Ellis, Montana. 



OPHIOGLYPHA TEXANA, Clark, 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." 



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

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



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

 Worth. 



OPHIUUA GRANULOSA, Eoetner, 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 ein 

 Furche getrennten, deutlich gekornten Seitenschildchen ; wo sich deren vier 

 beriihren liegt ein kleines, dreieckiges Schildchen dazwischen." 



x 



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. 



