51 



the case, and as it is expedient, for the sake of reference, that the shell 

 now described should not go forth unnamed, I have given it the piovisio- 

 nal appellation of Novaculina, a name, I believe as yet unoccupied 

 in Natural History. The only species known may appropriately be 

 called Gangetica: the following is its description. Shell oblong, with 

 truncated extremities, white, slightly violaceous internally, epidermis 

 olivaceous. 



Art. Vir. A descriptive Catalogue of the species composing the genus 

 Chilina of Gray, by G. B, Sowerby, F. L. S. 



1 . Chilina Dombeyana. Testa ovato-oblonga, anfractibus quatuor 

 ad quinque, subventricosis, postice rotundato-subangulatis, linea 

 impressu prop^ suturas ; apertura magna, longitudine spirara 

 superante, labio columellari albo, latiusculo, dente valido; 

 long. 1-5, lat. 0-8, poll. 



Syn. Auricula Dombeyana, Lam. Hist. Nat. des Anim. sans 

 Vert. vi. pt. ii. p. 140. Encycl. method, t. 459, f. 7. Conch. 

 Illustr. f. 11. 



Hab. in fluminis Peruviae ; (Baldivia, Concepgao, Santiago, 

 &c. 



Obs. This species, like others of the subgenus, varies greatly in its 

 proportions : the aperture is however always rather longer than 

 the spire : and the spire is usually rather longer in proportion to 

 the aperture than in the other species. 

 2. Chilina ampuUacea. Testa ovat^, tenui, anfractibus quatuor ad 

 quinque, ventricosis, postice rotundato-angulatis, pleruraque 

 linea inpressa prope suturas, ultimo maximo, ampullaceo ; aper- 

 tura magna, longitudine spiram multo superante ; labio colu- 

 mellari albo, angusto, dente parvo : long. 1*4, lat. 1% poll. 

 Conch. Illustr. f. 3. 



Hab. in fluminis Peruvian, (Baldivia.) 



Obs. This species appears to be less variable than the others in its 

 proportions. Some specimens have irregular rather elevated 



