and on the Fossil Remains contained in them. 137 



Among those of which no recent analogue is known, 

 appears to be the terehratula, figured in Dale's History and 

 Antiquities of Harwich, &c. lab. xi. fig. 9» P- 294, and de- 

 scribed, Phil. Trans. No. 291, p. 1578. Mr, Dale describes 

 this shell as Concha longa j'ossills fasciata , and remarks that 

 he has not observed " either in Aldrovandus, Rondeletius, 

 Belonius, Gesner, Johnson, Lister, or Bonarius, any shell 

 that resembles this our fossil, unless it is one of those 

 figured by Lachmuud, p. 43, No. 6 and 7, the inward part 

 resembling our fossil." The shells figured by Lachmund 

 are undoubtedly terehrntulce, but ihey manifest no particular 

 agreement with this fossil. 



This shell appears to be figured by Lister, Histor. Con- 

 chyl. tab. 911, fig. 45, and is assumed by Gmelin as Ana- 

 mia spondylodes. The other shells, fig. 46, of the same 

 plate, referred to by Gmelin as Anomiapsiltacea, appear to 

 be mutilated specimens of the same shell. This opinion 

 is corroborated by the tint given by the accurate artists to 

 the whole of the shells contained in this plate, agreeing 

 with the dark colour of the Essex fossil ; and by the cir- 

 cumstance of their being generally found in the mutilated 

 state in which they are here figured by Lister. Besides, 

 neither of Lister's specimens at all agrees with the pellucid 

 shell, with a triangular foramen, oi Anomia psittacea, but 

 they all agree with the oval antiquated shell, with an obtuse 

 canaliculated beak, o^ Anomia spondylodes. 



In consequence of this agreement, it seems proper to 

 consider this fossil shell as forming the species Anomia 

 spondylodes. But as the channelled beak is not natural to 

 it, but is the consequence of injury ; and as this part, in its 

 natural state, is pierced with a large round foramen, a cor- 

 respondent change should be made in the description, and 

 it may be placed under the more apprupriaie genus of tere- 

 hratula, as Terehratula spondylodes, with an oval antiquated 

 shell, the beak pierced by a large round foramen. 



This shell is, in general, about an inch and a half lonj^, 

 thick, nearly oval, roughly striated transversely, and has its 

 large foramen defined by a distinct border. It appears to 

 differ from every known recent or fossil terehratula. 



Another of the prol-ably lost shells of this stratum is the 

 fossil oyster, figured Organic Reniains, &c. vol. iii. pi. xiv. 

 fig. 3, and which is then; conjectured to be the same oyster 

 as that which is described by Lamarck as Oitrea da/hnnis. 



The volute, Oroanic Remains, vol. iii. pi. v. fig. 13, is 

 another shell belonguig to this stralun), of which it is be- 

 lieved that no recent analogue has been yet lound. This 



ovale 



