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have been able firmly to grasp even any small substance, A magni- 

 fied view of one of these terminations is given, Plate XVII. Fig. 17. 



Taking this circumstance in conjunction with that of the distance 

 at which the greater part of these bodies are placed, from that cavity 

 in which the mouth of the animal most probably existed, there seems 

 to be sufficient reason for considering these parts as answering two 

 purposes ; being supplementary to the organ of attachment, as well 

 as serving to assist in securing the prey of the animal. 



The notion of their having been serviceable to the animal in pro- 

 moting its attachment to adjoining bodies, cannot fail to be formed in 

 the minds of every one who observes the manner in which, like web- 

 bed feet, they are spread out in every direction, Plate XVII. Fig. 

 9. Besides, by this power of laying hold of different bodies with 

 these tentacula, they were probably enabled to secure themselves in 

 any particular spot, by clinging to a substance whose size and figure 

 would admit of being thus grasped^ That those also which are near 

 to the superior part of the animal, might also assist in securing its 

 prey, and in conducting it to the fauces of the animal, is rendered 

 evident by the specimen, Plate XVIII. Fig. 3, where these parts are 

 very differently disposed, from what is observable in the specimen last 

 noticed. Here all the upper processes, instead of being widely ex- 

 tended, are closely laid together, extending upwards, parallel with the 

 vertebral column, with their terminations collected round the brim 

 of the pelvis, exactly as if aiding in preventing the escape of the 

 prey. 



Proceeding now to the superior part of the animal, I must again 

 have recourse to analogy with the more perfect animals, as in the 

 encrinites, to obtain names expressive of the parts to be here de- 

 scribed. At this superior extremity, on the five sides of the vertebral 

 column, are disposed those parts which, from their use, as I have al- 

 ready done with the corresponding part in the encrinites, I shall con- 

 sider as the scapuke of the animal, Plate XVII. Fig. 15, a. This 



