TurrilitCS COStatllS. LAMABK. 



Fig. 2. Apertural view of a specimen. Pages 22 and 23 



a. Apex. 

 a f . Spire. 



b. ( 



c. < Sutures. 



d. ( 



g. Aperture, 



Bacilli tes ancepS- LAMAKK. 



Fig. 1. View of the internal shell. Page 22 



a. Aperture. 



b. Septa. 



c. Sutures. 



PLATE I. 



GASTEROPODA. 



Triton COlTUgatuS. LAMARK. 



Fig. 23. Longitudinal section of a specimen. The upper part of the 



spire has been partitioned on many times successively. Page 23 



Fascioloria tulipa. 



Fig. 14. Apertural view of a specimen. Dextral. Page 23 



a. Posterior canal. 



b. Anterior canal. 

 d. Labrum. 



