KHASIELLA.. 



159 



Nevill (Hand-1. i. p. 30) classes this as a variety of K. climacteric^ 

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

 distinguished, K. climacterica being distinctly keeled and depressed, 

 K. vidua angulate to rounded and generally subturbinate. 



[Fig. 57. Khasiella vidua. 



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



B. Mantle-zone removed, snowing 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 6. 



E. Shell, x 2-25. 



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



a. Jaw, x 18 ; teeth of radula, X 273.] 



