CANADIAN FOSSILS. 65 



Eeteoceinus? fimbeiatus, Billings. 

 Plate IX. Figures Sa-Sc. 



Description. — Length of the only specimen discovered, including 

 the arms, about fifteen lines ; basal plates, minute ; sub-radials, one 

 line in height ; arms, several times divided and furnished with pin- 

 nulce. At the apex of each of the basal plates there is an aperture 

 half a line in width, and another of the same size at the lower angle 

 of each first primary radial. The primary rays, so far as they have 

 been observed, consist each of three plates, the first heptagonal, the 

 second hexagonal, and the third pentagonal, — the spaces between 

 them filled with very small plates. A single joint of the column 

 remains attached to the base of the cup. It is pentagonal, with 

 slightly concave faces and rather sharp angles. 



The specimen is very imperfect, and it is with much doubt that I 

 refer it to the genus Reteocrinus. 



Explanation of Figures. Plate IX. 



Figure 3a. The only specimen discovered. 



" 36. The base, enlarged ; the unshaded pentagonal space shews the form of 



the upper joint of the column. 

 " 3c. One of the arms, with some of the pinnule attached, enlarged. 



Locality and formation. — Hudson River group, Charleton Point, 

 Anticosti. 



Syringocrinus paeado-xicus, Billings. 



Plate X. Figure 14. 



Description. — Of this crinoid no perfect specimens have been 

 collected. The fragment figured exhibits in the side exposed two 

 series of polygonal plates, so arranged that they appear to constitute 

 part of a tube, one half of which (probably composed of two other 

 series of plates,) is buried in the stone. At one extremity (the lower 

 end in the figure,) this tube is one line and and a half in diameter ; 

 but as it appears to be flattened by pressure, its thickness did not 

 probably much exceed one line when not distorted. At the other 

 end it seems to be somewhat larger, but this may be owing to the 

 separation of the plates. At this extremity also there appears to be 



