290 



ZONITIDJE. 



median and admedian are almost triangular, without distinct 

 lateral cusps. The outer laterals are unicuspid at first, but soon 

 become bicuspid and towards the margin are small and narrow. 



As the animals of the Burmese forms referred to Hemiplecta, 

 with the exception of H. uter, are imperfectly known or un- 

 known, it is doubtful whether all belong to the present genus. 



[Fig. 88. Hemiplecta humphreysiana. 



A. Animal, spirit-specimen, viewed from left side. X 1*8. 



B. Ditto, ditto, viewed from the anterior and lower side. X 1'8. 

 0. Genitalia, natural size. 



D. Teeth of the radula, X 276 ; jaw, X 6. 



' Hemiplecta uter. 



E. Teeth of the radula, x 276 ; jaw, x 6.] 



