KHASIELLA. 



159 



Nevill (Hand-l. i. p. 30) classes this as a variety of K. climacterica, 

 but, despite some appearance of passage, the two forms are easily 

 distino-uislied, A', climacterica being distinctly keeled and depressed, 

 K. viilua angulate to rounded and generally subturbinate. 



[Fig. 57. — Khcmella vidua. 



A. Animal, spirit-specimen, mantle-zone removed. X 3- 



B. Mautle-zone removed, showing the right and dorsal lobes. X 6. 



C. Extremity of foot. X 3-25. 



D. Mantle-zone, showing the right and dorsal lobes posterior dorsal lobe 



turned back. X G. 



E. Shell. X 2-25. 



F. Generative organs. X 3'3 and 6. 



G. Jaw. X 18 ; teeth of radula, X 273.] , 



