126 



zonttiti-t:. 



epiphallus thence to the junction of the vas deferens is very long, 

 and at the junction gives off a long kale-sac. The amatorial organ 

 is long. The spermathcca consists of an oval sac at the end of a 

 thickened stem. 



Fig. 49. — MacroMamys c.rul. 



A. Portions of the mantle-zone showing shell- and dorsal lobes. X3"3. 



B. Generative organs. Xt). 



C. Jaw. Xl8. 



D. Teeth of the radiila. 



Macrochlamys. heafa, 



E. Teeth of the radula. X413. 



Jaw moderately curved, with a slight median projection. 

 Radula formula : 



35 . 1 . 10 . 1 . 10 . 1 . 35 

 or 46 . 1 . 46 



Central tooth rather short, with small blunt basal cusps ; the 

 admedian teeth on quadrate plates, blunt cusps low down on outer 

 margin ; the laterals are long, aculeate, and slightly curved, 

 becoming very short on the outer margin. 



