Gen. Hardwicke on the Bos Gour of India, 231 



Filograna. Plane. Conch, p. 46 & 113. App. t. 19. 

 fig. A. B. 

 Seba. Vol. 3. p. 10. fig. 8 & 19. a, 

 Serpula Filograna. Linn. Syst. Nat. p. 1265. 



Gmel. 3741. 

 Serpula complexa. Turt. Conch. Diet. p. 153. 



Dredged up at Weymouth. 



According to the principles on which Lanriarck has founded 

 his genera, the two animals described above would form fit sub- 

 jects for two new genera. I have however thought it more pru- 

 dent to leave both for the present in Serpula, till more be known 

 of the foreign species. Serpula tuhularia * and triquetra are by- 

 Lamarck referred to two diiferent genera, on account of the tes- 

 taceous operculum of the latter. There is no other difference in 

 the animals, and I have seen the operculum with nothing more than 

 a mere film of shelly matter, so as not to appear obviously testa- 

 ceous without accurate examination. The dentate aperture affords 

 no good character ; for S. tuhularia, in its young state, is furnished 

 with a strong keel; and on this account Montagu confounded it 

 with »S'. triquetra, and has therefore quoted the synonym of Ellis 

 for the latter species ; but in the Supplement, he describes the 

 real triquetra as distinct, having found that its animal did not 

 accord with his former observation, being provided with a shelly 

 operculum. 



Art. XXTV. On the Bos Gour of India. By Major- 

 Gen. T. Hardwicke, F,R., &; L.S., S^c, 



In the Edinburgh Philosophical Journal, No. 22, for October, 

 1824, is given a very interesting account of this new species of 

 the bovine genus, from the pen of Dr. Thomas S. Trail ; and as no 

 drawing of the animal has yet been given to the public, to my 

 knowledge, I am induced to offer to the Zoological Journal, for 



* Described in Lamarck under the name of 'S. vermicular is. Tlie real ver- 

 miailariSf which has a double striated operculum, is his variety. 



