510 FOSSIL INVERTEBRATED ANIMALS. 



are to be found at Valognes ; and on one of them, whose arti- 

 culations are equal between themselves, we see a small isolated 

 appendage^, which may have served to sustain a lateral branch, 

 or which, perhaps, is a sort of bud from which a new polypus 

 might spring. 



A portion of a round stem, in the collection of M. Brog- 

 niart, and on which we find, irregularly disposed, certain little 

 round places, having radiated striae, might lead us to suspect 

 that these encrini possessed the faculty of reproducing by 

 shoots, like some other species of polypi. 



There are stems which seem to occupy a medium between 

 those which are round and those which have several corners. 

 Some have their axis pierced with a pentagonal hole ; and their 

 striae are not radiated from the centre to the circumference : 

 some are smooth, and others carry verticillated asperities on 

 each of their articulations. These last are found in the environs 

 of Besancon. 



The five-cornered stems, whose articulations have a star 

 well marked on each of their flat surfaces, present, also, many 

 varieties. Some are almost round ; others have five rounded 

 projections ; and others have very sharp angles. In all these 

 species, on some articulations, may be remarked the traces of 

 five lateral branches, which must have been attached in each 

 of the re-entering angles. We may believe that these species 

 have some relation to the encrinus called Pentacrinites briar eus, 

 which is known in the living state, and which has been found 

 in the neighbourhood of Martinique. This fossil is very com- 

 mon about Charmouth, and we have engraved a specimen from 

 that locality. 



Articulations of this sort are to be met with in the environs of 

 Valognes and of Caen; at Nevers; in Mount Jura; at Dijon, &c. 



It was believed, until recently, that these articulations were 

 to be met with only in the most ancient strata of the globe ; 

 but M. de Gerville, a clever naturalist, has found them in the 

 faluniere of Nehau, department of the Manche, which is analo- 



