5. Akera. (1) Muller. 



( 61 ) 



Tenia cula so short 

 and broad as to appear 

 wanting or replaced 

 by a fleshy rectangular 

 shield. PI. 16, fig. 1,2, 

 3, 4, 5. 



ORDER IV. PULMONACEJE. 



GENERA. 



A. Terrestrial ; shell interior ; almost all with 4 tentacular 



1. Limax. (2) Lin. 



Body elongated ; a Orifice of respiration 

 fleshy disk instead of a on the right side towards 

 mantle, anterior and co- the front, 

 vering the pulmonary ca- 

 vity only. PI. 13, fig. 18. 

 PI. 15, tig. 13. 



2. Testacella. (3) Lam. 



Mantle very small, pos- Orifice of respiration 

 terior. PI. 16, fig. 18. posterior. 



3. Parmacella. Cuv. 



Mantle membranous, Orifice of respiration 



with the edges flaccid, under the right side of 



PI. 14, fig. 9. PI. 16, fig. the middle part of the 



9. mantle. 



B. Terrestrial; shell exterior; almost all with 4 tentacula. 



4. Vitrina. Drap. He- 

 llco-Limax. Ferus. (4) 



Body protected in front Body too large to en- 

 by a sort of cuirass, and ter entirely within the 

 behind by a thin shell shell, 

 which may be partly co- 

 vered by the lobes of the 

 collar or mantle. PI. J 4, 

 fig. 12. 



(1) Their hermaphroditism, the position of their two sexes flw» *• 



J&L^Z^:l\Z b 7L e U^. ia theform ° f a **** °m*«> 



(3) The T. halwtidca lives under ground, and feeds principally on worms M 



