SERPULA. 443 
Serpula filograna. 
The Serpula filograna of authors (Seba, Mus. vol. i. pl. 100, 
f. 8), a common British Annelide, is still preserved in the box 
thus marked in the Linnean cabinet, and exclusively suits the 
definition of the species. The synonymy, in the main, cannot 
be pronounced incorrect, although much of it aids us little in 
determining what was meant. In the only edition of Boccon’s 
‘Museum’ I have seen, the rude sketch of Rete marinum, in 
plate 2, may pass for jfilograna; it has not, however, the 
numerals 13 appended, nor can I find anything lke it at “ 228, 
t. 7, f. 2.” Neither Ray nor Pallas has delineated it; their 
few words, however, are not at variance with its characters. 
Seba, pl. 100, f. 8, is decidedly characteristic: Plancus has also 
well figured it in his Appendix; and the engraving of T’wbipora 
ramosa in the Russian ‘ Transactions’ (1758, 1759) is satis- 
factory enough. 
Serpula qranulata, 
The Spirorbis granulata of British writers (Brit. Marine 
Conch. f. 64) alone of the contents of the Linnean cabinet 
answers to the description of this Annelide, whose presence in 
his collection has been recorded by our author. The Northern 
habitat, by greatly limiting the number of Spirorbes to be com- 
pared with the meagre definition, doubtlessly facilitated the 
recognition of the species. 
Serpula contortupltcata. 
The account of this species in the ‘Fauna Suecica’ was 
copied verbatim from that in the ‘Systema.’ As Dillwyn has 
justly observed, the most important features in the description 
of this Serpula are the terms “ semiteri, carinata”’ (keeled and 
semicylindrical, i.e. flattened below). The group of twisted 
