^2 



EXPLANATIONS. 



Cirrhipeda class," said Lucy ; " the forms of 

 the shells are remarkable : and those that live 

 on Madrepores I shall search for immediately ; 

 but what a number of new genera are taken 

 from the single one of Lepas r 



^' Since the time of Linnaeus," replied Mr. 

 Elliot, " many more observations have been 

 made upon the shells that he had examined ; 

 many new shells, both genera and species, have 

 been found; and there is little doubt that, if 

 Linnaeus had now been living, he would have 

 found his own genera inadequate, and would 

 have established new ones. I fear you will 

 have to regret the opposite extreme, and com- 

 plain of the multiplicity of new genera, and new 

 names. Our object is to become familiar with 

 the shells, and by knowing the Linnaean name, 

 and that bestowed by Lamarck, two authorities 

 very generally cited, you may understand what 

 species is alluded to by modern conchologists. 

 The names of Brugruieres, Leach, Gray, and 

 Sowerby will often occur among many others. 



" For example : let us take the plate of a 

 remarkable multivalve; you find that it is named 

 Scapellum rulgare^ and that it is so called by 

 Leach. Below, you find ' PolUcepes scapellum^ 

 Lamarck;' and on referring to our comparative 

 lists we find that the shell was a Lepas, (Z. 

 scapellum of Linnaeus.)" 



