CALL ON NEW MOLLUSCA. 3 



3 + 1+3 



34-23-7 i ^ 7-23^34. 



"The apparent articulation of the intermediate teeth, as described 

 above, was observed in a fragment of an odontophore which presented 

 a lateral aspect under the microscope. It is not known that this feat- 

 ure has ever been noted in any other species, although it very proba- 

 bly occurs in many which have foraminated or bullate teeth. This 

 disposition of the teeth would allow great flexion of the odontophore 

 without their displacement." 



FIG. i. Lingual dentition of Amnicola dalli, Call x 400. Beecher. 



a. Two of tlu transverse rows of the odontophore, showing- the normal position of the teeth. 

 The teeth are considered as opaque. 



Analysis: b. Outer laterals, c. First laterals, d. Intermediate teeth, e. Rachidian 

 teeth. 



FIG. 2. Intermediate teeth ( x 400), showing mode of articulation. Beecher. 



