EXPLANATION TO ARTICLE IV. THIS VOLUME. 



In the second number of this volume, I have described 

 a Crustacean, under the new genus Brongnartia. A few 

 years later the figure of a Serolis (Leach,) was given in Dr. 

 Buckland's volume of the Bridgewater Treatise ; though 

 much smaller in size, every one must be struck with the 

 close resemblance of the two. At the time my article on 

 this animal was published, there was nothing but a de- 

 scription of the genus Serolis that I could have access to, 

 and in all the works containing it, it was described as be- 

 ing destitute of Palpi to the mandibles. In the Brmgnar- 

 tiuj these organs are strikingly palpigerous, a distinguish- 

 ing character, which must remove it, not only from the 

 genus Serolis, but also from the order to which that animal 

 belongs. 



JAMES EIGHTS. 



