289 



four speciet only, and they are all fossil. Even at the conclusion 

 of his great work, in 1822, he appears not to have known any living 

 species. 



" Another species was described by Sowerby, from a specimen 

 in the British Museum, and to these may, perhaps, be added a 

 fossil species in my cabinet, which occurs in the vast shell limestone 

 formation mentioned by Humboldt, as extending to some distance 

 inland along the shores of the Mexican Gulf. 



" The character of Clavagella is — An animal inhabiting a testa- 

 ceous sheath or tube, open, but contracted anteriorly, and club- 

 shaped posteriorly ; sheath furnished with spinous tubes. Within 

 the sheath is an equivalve bivalve shell, one valve of which is im- 

 raoveably attached to the sheath, the other free, and united to the 

 other by a cartilaginous hinge. Both cover the body. The animal 

 is an inarticulate mollusque, without head or eyes ; a concealed 

 unarmed mouth ; a large mantle, with two lamelliform lobes. Ex- 

 ternal bronchial openings placed between the body and mantle on 

 each side. 



" It belongs to the division Crassipedes." 



The following candidates were elected Fellows of the So- 

 ciety : — 



R. Chambers, Esq. 



James Forsyth, Esq. 



Sir John Macneill, G. C. B. 



