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Mr. Walker, who found on our shores, in a recent state, three, and 
perhaps four, of the species which have been just shown to exist, as 
fossils, in the neighbourhood of Paris. 
Miliolites Saxormn, Lam. appears to agree with the hollow oval 
worm-shell, Serpula subovalis intorta , of Mr. Walker, Testae, minut. 
rarior. PI. I. Fig. 1. Mr. Montague, who separated from the genus 
Serpula those shells of this family which are independent, or not 
attached to other bodies, and placed them under a new genus, which 
he names Vermiculum, considers this shell as V. intortum ; and very 
justly observes, agreeable to the observations which I have myself 
made on the fossil shells in the sand from the neighbourhood of Paris, 
that it is so variable in its formation, that, without great attention, 
it might be formed into several species. Testae. Brit. p. 521. 
Miliolites opposita, Lam. Plate XL Fig. 20, is undoubtedly the 
same shell as the bellied semilunar worm-shell, Serpula bicornis ven- 
tricosa of Walker, Testae, min. rar. PI. I. Fig. 2. The difference 
which exists between the representations of Lamarck and Walker, is 
very satisfactorily explained by the observations of Mr. Montague, who, 
previously to the same shell having been figured as a fossil, suggested 
such alterations in the figure given by Mr. Walker, as would make it 
agree perfectly with that of Lamarck, and names it Vermiculum 
bicorne, Testae. Brit. p. 519- Serpula bicornis umbilico perforato, 
Testae, min. rar. Plate I. Fig. 3, appears, in Mr. Montague’s opinion, 
to be no other than a mutilated specimen of the former shell. The 
recent shell was found at Sandwich and Reculver. 
Miliolites cor anguinum, Lam. Plate XI. Fig. 14, 15, and 16, 
exactly corresponds with Serpula subrotunda dorso elevalo, of Walker, 
Test. min. rar. Plate I. Fig. 4, Vermiculum subrotundum, of Montague. 
M. irigonula, the different sides of which are shown Plate XI. 
Fig. 17 , 18, and 19, is an inflated body, of an ovato- trigonal form : 
its recent analogue does not appear to be known. 
XC. JRenulina. A flat, sulcated, reniform, many-chambered shell : 
