^EW GENUS OF ENCRINITE9. 353 



in number, each formed at its base of a thick pentagonal plate, 

 which is concave and irregular on the inner side, convex, and 

 externally forming a thick, nipple-like tubercle, the margins 

 of which, flattened at their junction with the three other si- 

 milar pieces, are united in a compact manner. On the upper 

 portion of the first piece, which has two angles, each arm be- 

 comes dichotomous; there are therefore eight arms, which 

 are thick, strong, conical, almost twice as long as the foot, 

 rounded and tuberculated on their mesial portion, and as it 

 were festooned on their outer margins, alternate, and com- 

 pressed at their extremity, composed of calcareous pieces, 

 which are thick, and twenty-five in number, each piece bear- 

 ing alternately right and left, a conical ramule, which is elon- 

 gated, much compressed, rugose externally, somewhat concave 

 internally, and formed of many quadrangular pieces joined 

 together. 



Internal parts. — The cavity which occupies the whole ex- 

 tent of the foot or body, no doubt contained the viscera.^ — 

 Mouth (as well as the anus) protected by four moveable, an- 

 gular, stony pieces, which close the opening at the will of the 

 animal ; it opens into a vestibule, which is dilated in the up- 

 per portion of the body, separated by some ciliated and irre- 

 gular excrescences at the base of the arm from a large ftmnel, 

 formed of four deep grooves, each dividing into two ; these 

 are continued, though less distinctly, throughout the whole 

 extent of the inner side of the arm. 



Colouring. — The general tint of the dried animal is green- 

 ish, almost black on the body, and paler on the arms and root. 



Dimensions. — The specimen described measured eight cen- 

 timetres (three inches and two lines English measure) in total 

 length : the foot is 10 J lines ; height of the root, 4f lines ; 

 diameter of root at the base, 8;^ lines ; diameter of the foot, 

 6^ lines. 



' As the animal came into our possession in a dried state, it was impos- 

 sible to study the conformation of these parts. 



