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3 LI 
) €" 
(gat) 
XXX. Some Account of the Spiral Tubes or Ligaments in the Genus 
Terebratula of Lamarck, as observed in several Species of Fossil 
Shells. By Mr. James Sowerby, F.L.S. 
Read December 6, 1814; and February 7, 1815. 
I wave the honour of submitting to the Linnean Society a sketch, 
showing the general construction with the extraordinary spiral 
and perhaps originally cartilaginous tubes of a certain division of 
the genus Anomia of Linnæus, or Terebratula of Lamarck, ‘The 
Anomia striata of Martyn is represented at Fig. 2. (Tas. XXVIII), 
having its triangular aperture between the beaks, which is charac- 
teristic of the division. In this species the side of the spiral tube 
is of a darker colour than the crystallized carbonate of lime which 
fills the shell, the whole being limestone. It is probable that 
these peculiar constructions may give characters to new genera, 
of which many species are found in England, France, Ireland, 
and even in New Holland, imbedded in limestone, flint, chert, 
or sandstone. In a specimen brought from New Holland by 
Mr. Brown, one only of the spiral tubes is to be seen ; and it was 
not known positively that the shell ought to have two, until, a 
short time since, I discovered in my collection a complete speci- 
men, from which Fig. 1. is taken. | 
Fig. 1. 
