98 CLASS ANNULATA. 



colourless blood. The Class of Annulose animals has 

 been separated into three Orders, namely, Annidata 

 sedentaria, which are fixed to other substances ; Annu- 

 lata a}itennata, possessing antennae, or feelers ; and 

 Anmdata apoda, without projecting members answering 

 as feet, serving solely to attach the animal to rocks, 

 stones, &c. 



ORDER ANNULATA SEDENTARIA, 



(Sedentary Annulose Animals.) 



The creatures which form this order are generally 

 found attached to rocks, shells, &c. and are usually of 

 small size. The engraving represents a variety of spe- 

 cies of these animals. Of the genus Serpula there are 

 many species, but as it is in general merely the shell 

 that is found in collections, they are but ill defined; some 

 of the species are found in almost all climates. The 

 animal of the Serpula has great power of contracting 

 its body, but it never leaves its shell or tube ; this tube 

 is gradually lengthened by the inhabitant, who always 

 occupies the most recently-formed portion of it ; its 

 operculum, the lid with which it closes the opening of 

 its tube, is very prettily formed ; it is something like the 

 mouth-piece of a trumpet, but of course not perforated, 

 and it closes the opening with great accuracy. 



The Magnificent Amphitrite, 

 ( Amphitrite maynijica.) 



This beautiful species is perhaps the largest of the 

 whole tribe as yet discovered. It is found in various 

 parts of the coast of Jamaica, adhering to, or rather 



