Fossils of the Calciferous Sa?idrocJc. 



347 



CRIN0DIDEJ2. 

 Fig. 1— -m — n. 



A fragment of a crinoidal column, two lines in diameter, 

 composed of thin joints, of which there are six in two lines. The 

 joints vary slightly iu thickness alternately, and the edges of the 

 thicker ones project a little, so that the column is not smooth, but 

 annulated. The central canal is obscurely pentagonal, or nearly 

 circular. See Fig, 1 — m, n. 



Locality and formation. — Mingan Island, Calciferous Sandrock, 



Collectors. — Sir W. E. Logan, J. Richardson. 



TTV 



Fig. 1. 



a Lingula Lyelli. 



b Transverse section of L. Lyelli. 



c Young specimen of L. Lyelli. 



d Transverse section. 



e—f Lingula Mantelli. 



g Orthis grandceva, ventral valve. 



h Inside of same. 



i Side view. 



k — o Crinoidal columns. 



Fig. l—o. 



A Column two lines in diameter, composed of large and 

 small joints, the former thin and widely projecting as in that 

 portion of the Glyptocrinus ramulosus, which is next to the cup- 

 I think that this is the column of a species of Glyptocrinus. See 

 Fig. l-<>. 



Locality and formation. — Mingan Islands, Calciferous Sand- 

 rock. 



Collectors. — Sir W. E. Logan, J. Richardson. 



Fig. 1— k, I. 



A smooth circular column, three lines in diameter, composed 

 of thin equal joints, of which there are ten in three lines. The 

 central canal is trilobed. See Fig. 1 — 7e, I. 



