16 EXCURSIONS IN MADEIRA 



of a fucus, was found within, and proved to be hollow. On the 

 branches were several avicula, covered with long spines, and with 

 one of the ears extremely long : the species not being described by 

 Lamarck, and not recollecting to have seen it, I have made a 

 drawing of that, and a part of the sertularia, fig. 5. AnomicB were 

 attached to these shells, and also to the sertularia ; and on a broken 

 valve was a fragment of the siliquaria echinata. The whole was of 

 an elegant, arborescent form, and extremely interesting, from the 

 combination of objects which it presented. 



