220 BERMUDA. 



organs for seizing their prey, they destroy many 

 fishes and crustaceans. 



The animals of this order, which are found around 

 the shores of Bermuda, naturally arrange themselves 

 under three divisions, which are as follows : — 



1. Naked Cephalopoda ; no shell, either internal 

 or external. 2. Monothalamous testaceous Cepha- 

 lopoda: the shell unilocular, entirely external. 

 3. Polythalamous testaceous Cephalopoda: the shell 

 multilocular, subinternal. 



I. Cephalopoda Sepiaria : — 



The Sepiaria are marine animals, some of which 

 creep along the bottom, and others swim at large. 

 They are all destitute of shell. 



In the first division we meet with the two following 

 genera around our shores : — 



1. Genus Octopus (the Polypes). — Body fleshy, 

 obtuse beneath, and contained in a sac, which is 

 destitute of wings ; no internal dorsal bone, or only 

 a very small one ; mouth terminal, surrounded with 

 eight simple, elongated arms, furnished with sessile 

 cups. 



The only species known here is the Octopus 

 octopodia. Body rounded, smooth, mantle con- 

 nected with the head behind ; suckers sessile, in a 

 single row i arms six times as long as the body. 



