hend that the vessel passing along the groove in the tentacula of the Crinoidea, 

 and probably also iu the unfiinbriated Comatula, is in these placed near the ex- 

 terior margin of the fimbriae, where it is protected by the minute plates noticed 

 before. 



I have not been able to examine the ComatuUe while alive, but the observa- 

 tions made by M. PERRON as stated by M. LAMARCK in his Animaux sans 

 Vertebres, are so satisfactory that I feel no hesitation to subjoin them in this 

 place, more especially, as that naturalist made them unprepossessed by any 

 idea of the resemblance which they bear to the Crinoidea. He notices the 

 power which the animal has of extending its mouth into a kind of proboscis, 

 which, reasoning from analogy, confirms the idea which I have before expressed 

 on the probability of a similar extension of the mouth of Pentacrinus caput 

 medusas. He also states that the animal suspends itself by its auxiliary side 

 arms from fuci or branches of polyparia, watches for its prey and detains it 

 with its spreading arms or fingers, guiding it to its mouth with its auxiliary 

 side arms. 



LAMARCK has described eight species, which will require a new specific cha- 

 racter in conformity to the generic one furnished above ; but as his descrip- 

 tions are not sufficiently detailed, to enable me to draw from them that inform- 

 ation requisite to remodel them in this manner, as the major part were procured 

 by M. PERRON and LE SUEUR, and hence exist only in the French museums, 

 which I have no opportunity of seeing, I wave entering for the present 

 further on the subject. 



I have had only an opportunity of examining a few specimens of a species 

 which occurs in Milford Haven, and which I have named 



COJVIATULA FIMBRIATA. 



Specific Character. 



A Comatular animal with an orbicular depressed body, provided with 

 numerous auxiliary side arms,* and ten finger-like arms surrounding the mouth 

 which is in the centre. The arms and tentaculge are fimbriated, and in part 

 tied together by a thin transparent membrane, bordered at its outer margin with 

 minute scales. 



