94 collinge: non-operculate land ank freshwater molluscs. 



EXPLANATION OP^ PLATES IV-VL 

 PLATE IV. 



Stirptaxis sykcsi, n. sp. 

 Strcplaxis striatiila, n. sp. 



Fig. II. 



Fig. 12. 

 Fig. 13- 

 Fig. i4. 



F'ig. 15. Ciyptosoma, sp. 



Fig. 26. 



Dorsal view of the shell. x 2. 

 Ventral view of the shell, x 2. 

 Dorsal view of the shell. x i. 

 ,, „ Ventral view of the shell, x i. 



Apopaniiarioii paiirUb^ii, n.sp. Dorsal view of the shell. x 2. 

 „ ,, ■ Ventral view of the shell, x 2. 



„ „ Alimentary canal, enlarged. 



,, „ Generative organs, enlarged. 



,, ,, Penis, much enlai'ged. 



„ „ Diagrammatic longitudinal horizontal 



section of the penis, showing the 

 form and extent of the cavity. 

 ,, „ Dart-gland and dart-sac, the latter 



opened to show the dart, enlarged. 

 „ ,, Free muscles, enlarged. 



Giiasin pcgiuiisis, Thi^ob. Generative organs, x 3. 



„ The same showing the penis, etc., in 



natuial position. The dart-gland 

 (d.gl.J has been moved slightly to 

 the left. The rcceptaculum seminis 

 and free-oviduct are not shown. 

 Terminal ducts of the generative organs, 

 enlarged. 

 Hciiiiplc'ctaJiiiiupIircysuuia, Lea, Generative organs of the Form .A. 

 ,, ,, Dart-sac opened to show the dart. 



,, „ Generative organs of the P'orm B. 



,, „ Vagina and free-oviduct dissected to 



show the internal walls. 



Hcniiplccta Iiiiinplircysiniui, Lea. Free muscles of the Form A. 



,, ,, Free muscles of the Form B. 



,, ,, Free muscles of the Form C. 



,, ,, The pallial complex, x l4- 



Aiupluilroiiiiis pciTcrsiis, L. Genera'ive organs. 



PLATE V. 



Anipliidi'oiiiiis pcrvcrsiis, L. Penis dissected to show Ihe internal 



walls and penis papilla. 



,, ,, Vvee muscles, enlarged. 



,, ,, The pallial comple.x. x i. 



Hypstiostoiiia laidlcVcCi, n. sp. Shell, x 8. 



,, ,, X'cntral view. x 8. 



Apopnnnarioiipaiiridiiii, n.sp. Right lateral view. x 1)4. 



,, ,, Dorsal view, x ij4- 



,, „ Left lateral view. x l^. 



