310 Mighels^ Catalogue of 



eastern shores, and among the islands, has procured many rare 

 species. Could the officers of the several Revenue Cutters in 

 commission in the United States be induced to imitate his 

 example, a vast amount of valuable matter would be added to 

 the natural history of this country. I would also acknowledge 

 my obligations to Dr. Ray, principal of the Insane Hospital 

 at Augusta, Dr. Milliken of Unity, and Mr. True, principal of 

 the academy at Monmouth, for many valuable species. 



I have omitted synonyms excepting in instances where it 

 was necessary to introduce them for the purpose of identifying 

 certain species. 



Several species of naked mollusca occur here, but not hav- 

 ing had opportunities to study them, so as to designate them 

 accurately, I have omitted them. 



Genus Balanus. Lam. 



B, geniculatus, Conrad. This is a pelagic shell, and is, 

 therefore, never found in place. As remarked by Dr. Gould, 

 1 have never found it in any other situation than in its 

 attachment to the valves of Pccten magellanicus. It is rare 

 in Casco Bay, but is probably plenty at Passamaquoddy and 

 the Bay of Fundy. It is much the largest of all our species of 

 Balanus ; I have one specimen two inches across the base, 

 and one and three quarters inch in height. 



B.ehurneus,QiO\i\d. Pelagic. This species is frequently found 

 attached to the backs and claws of the larger Crustacea, bits of 

 wood, &-C. in Casco Bay ; but I presume its more congenial 

 habitat is farther south, where it is more abundant and more 

 perfect. We obtain our best specimens from ships' bottoms, 

 from the West Indies. 



B. rugosus, Donovan, Montagu. This species occurs in 

 great abundance and perfection in Casco Bay. It is sometimes 

 found above low-water mark, attached to rocks, but it prefers 

 deeper water, and attains the greatest perfection when attached 

 to other shells, and sunken timbers. 



B. ovularis, Lam. Littoral. This species occurs in the 

 greatest profusion imaginable, covering rocks and wooden 



