596 



IX. RADIATA. 



This extensive class of animals has yet received but little attention in Massa- 

 chusetts ; comprehending- as it does, creatures of not much use to man, and for 

 the most part inhabiting" places out of the reach of eommon observation. In re- 

 spect to some of them, also, it seems not yet to be agreed, whether they ought to 

 be regarded as animals or plants. Through the assistance of Dr. Gould, I am 

 able to mention a few genera and species. But I hope the deficiency of the list 

 will lead those naturalists who are favourably situated for examining these an- 

 imals, to enlarge and perfect it. 



Similar remarks might be made in respect to our Annelides ; a much less nu- 

 merous class of animals. A few of these indeed, such as the leceh (Hirudo) and 

 earth worm, (Lumbricus,) are very common and well known ; but in general they 

 possess but little interest or importance. 



I. ECHINODERMATA. 



Aaterias spinosus. Sea-Star. Cape Cod. &c. 

 Echinus granulatus. Cape Cod, Boston Harbor. &c. 

 Scutella pentaphora. Cape Cod. 

 trifaria. 



II. INTESTINA. 



Filaria — various species. 



Tricocephalus Do. 



Ascaris Do. 



Taenia, inhabiting man, the cat, rabbit, &c. 



Ill ACALEPHA. 

 Medusa — one or two species on the coast. 



IV. POLYPI. 



Actinia — one species, Nahant. 

 Madrepora — several species. 



Spongia fluviatilis, L. In ponds. Leverett, Chesterfield, &c. and 

 at least two other species at Chelsea and Charlestown. 



V. INFUSORIA. 



Vibrio aceti. 



And many other genera and species in the various kinds of infu- 

 sions of vegetable and animal substances. 



