. Reference and Synonymes. 



Bottle Encrinite PARKINSON'S Org. Rem. vol. 2. PL. xin. fig. 75. and 76. 



Strait Encrenite (a young undeveloped species). PARKINSON'S Org. Rent, 

 vol. 2. PL. xin. fig. 34. and 35. 



Stag Horn Encrinite (the base of A. ellipticus.) PARKINSON'S Org. Rem. 

 vol. 2. PL. xin. fig. 31. 38. 39. 



Chalk Bottles vulgar name of the quarrymen. 



Luidii Lithophylacii Britanicii,t 13. fig. 1163. and 116I 1 . 



Locality. 



The Chalk Pits of Wiltshire and Kent. 

 t jwioTq*. T/<> 



Description. 



The elliptical shape of the columnar joints has induced me to assign to this 

 animal its specific name. It is found only fossil, and always in a mutilated 

 state in beds of the chalk formation. It is a small neat species, whose column 

 was, I apprehend, in proportion longer than that of the former species. An idea 

 of its probable appearance when perfect, I have endeavoured to convey, fig. 6. 

 in the annexed plate, which representation is, however, less than the natural 

 size, having also omitted the terminations of the auxiliary side arms, of whose 

 formation I have not the slightest idea, and the tentaculated fingers as yet not 

 detected. 



The COLUMN of thisCrinoidal animal offers a new field for inquiry, since its 

 joints appear to have consisted in a much greater degree of cartilaginous mat- 

 ter and muscular integuments, especially in younger specimens. Perhaps their 

 superior and lower surfaces alone, may, during the early stages of their 

 growth, have presented a solid calcareous mass. 



The articulating surfaces at both extremities of each joint present ellip- 

 tical areas (14. to 18.) bounded by slightly raised rims surrounding an inner 

 oval, which again swells and becomes convex. In the direction of the 

 longitudinal axis are placed two narrow ridges, one on either side, in the 

 centre of which is a small round perforation, containing the alimentary canal. 

 (18). It should be remarked that the direction of the longitudinal furrows, 

 and indeed of the whole oval areas of the articulating surfaces, does not ge- 



