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hend that the vessel passing along the groove in ihe tentacula of the Crinoidea, 
and probably also in the unfimbriated Comatule, is in these placed near the ex- 
terior margin of the fimbriw, where it is protected by the minute plates noticed 
before. 
I have not been able to examine the Comatule 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 
meduse. 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 te 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 subjects. 
I have had only an opportunity of examining a few specimens of a species 
which occurs in Milford Haven, and which I have named 
COMATULA 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 tentacule are fimbriated, and in part 
tied together by a thin transparent membrane, bordered atits outer margin with 
minute scales. * 
