12i 



ARTICLE VI. 



Description of a new genus of the family Melaniana of Lamarck. 

 By Isaac Lea. Read January 7th, 1831. 



Fabiily melaniana. 

 Genus To. 



Testa fusiformi ; basi canaliculatd ; spird elevatd; columella concavd lavique. 

 Shell fusiform ; base canaliculate; spire elevated; columella smooth and concave. 



To FusiFORMis. Plate XV. fig. 37, a, b. 



My Cabinet. 

 Cabinet of Professor Vanuxem. 

 Cabinet of Mr Say. 

 Cabinet of the Academy of Natural Sciences of Philadelphia. 

 Fusus fluvialis, Say, Journal of the A cademy of Natural Sciences 

 of Philadelphia, Vol. 5, p. 129. 

 Diam. -9, Length 2-2 inches. 



Remarks. — This very remarkable, interesting and rare shell was 

 presented to me many years since by Professor Vanuxem, by whom only 

 it has been found. Specimens were also presented by him to Mr Say 



