Gen. Hardwicke on the Bos Gour of India. 5?31 



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

 fig.A.B. 

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

 Serpula Filograua. Liiin. Syst. Nat. p. 12C5. 



Gmel. 3741. 

 Serpula coinplexa. Turt. Conch. Diet. p. 153. 

 Dredged up at Weymouth. 



According to the principles on which L:innarck 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 tubularia * and triquetra are by 

 Lamarck referred to two different 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 ajjpear obviously testa- 

 ceous without accurate examination. The dentate aperture affords 

 no good character ; for .S*. fuhularia, in its yf'uiig state, is furnished 

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

 with iS'. 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. XXIV. On the Bos Gour of India. Bt/ Major- 

 Gen. T. Hardwicki!:, F.R., 4- 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 Iwvine 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. vermicularis. T.'ie real ver- 

 uicularis, which has a double striated oiJCMculum, is his variety. 



