10 CRINOIDEJE. 



are not, however, all of the same size, nor placed on all 

 parts equally distant from each other ; for on the body 

 they are small, and the margins of the canals appear 

 lineated with them, but on the arms and pinna? they are 

 larger and more distant. On the extreme pinna? they 

 are very small, proportionate to the length of the pinna 

 and the developement of the membrane, for their number 

 is the same on all the pinna?. Thus, as there are thirty- 

 four pinna? on each side of each of the ten bifurcations of 

 the arms, and eighty-four brown spots in each, the whole 

 ten armlets will present the great number of 57,120 of 

 these spots, which appear to be the animal's ovaries. The 

 white milky fluid, on the contrary, would seem to be 

 seminal, as minute rounded, active animalcules are seen 

 in it when a drop is highly magnified. 



The whole of the animal is of a deep rose colour, dotted 

 by these brown ovaries, and fringed with the transparent 

 cirrhi. The description here given I have carefully drawn 

 up from specimens before me, taken by myself in the Irish 

 Sea, without adding several points observed by other 

 describers, but which I have not seen. 



M. Sars says there " are found on the upper part of 

 each arm, above the proper fins, on each side, four or five 

 thinner cylindrical thread-like fins (or pinna?) of greater 

 or less length, some consisting of seven or eight, others of 

 nearly twenty calcareous joints, which are also furnished 

 with feet"" (cirrhi). M. Dujardin states that the inferior 

 or ventral surface of the arms and pinna? is provided with 

 a double range of fleshy tentacula, protected by a double 

 range of fleshy lamella?, presenting between them a furrow 

 filled with papilla? furnished with vibratile cilia, by the 

 motions of which animalcula? and microscopic vegetables 

 are conducted along the arms to the mouth, in order to 



