442 EXPLANATION OF PLATES OF VOL. IH. 



XXV. Patula alternata. 

 XXVI. Cumberlandiana. 



XXVL a. strigosa. 



XXVn. Triodopsis tridentata. 

 XXVin. fallax. 



XXIX. Fig. 1. Zonites viridulus. 

 Fig. 2. indentatus. 

 Fig. 3. arboreus. 

 Fig. 4. cellarius. 



XXIX. a. There are two plates of this. That engraved by Delarue is as fol- 

 lows : — 

 Fig. 1. Triodopsis loricata. 

 Fig. 2. Zonites capsella. 

 Fig. 3. Ottonis (= arboreus). 



Fig. 4. Microphysa inerustata. 

 The other, engraved by Duthie, has 

 Fig. 1. Zonites capsella. 

 Fig. 2. Microphysa vortex. Other figures as in the Delarue plate. 



XXX. Fig. 1. Patula perspectiva. 

 Fig. 2. striatella. 

 Fig. 3. Zonites limatulus. 

 Fig. 4. internus. 



XXXI. Zonites fuliginosus. 

 XXXII. Itevigatus. 



XXXIII. subplanus. 



XXXIV. inornatus. 

 XXXV. ligerus. 



XXXVI. intertextus. 



XXXVII. Fig. 1.- Zonites suppressus. 

 Fig. 2. lasmodon. 



Fig. 3,4. gularis. 



XXXVIII. Polygyra scptemvolva. The outer figures are var. volroxis. 

 XXXIX. Fig. 1. Polygyra septemvolva, var. volvoxis. 

 Fig. 2. Troostiana. 



Fig. 3. pustula. 



Fig. 4. fastigans. 



XL. Fig. 1. Left hand, Polygyra auriculata. 

 Right hand, auriforrais. 



Fig. 2. Polygyra auriformis. 

 XL. a, Fig. 1. Polygyra leporina. 



Fig. 2. Stenotrema maxillatum. N, B. The enlarged view of the 

 aperture is misplaced with Fig. 3 on the plate engraved by 

 Delarue. It is correctly placed on that engraved by Duthie, 

 there being two plates of XL. a. 

 Fig. 3. Stenotrema germanum. 

 Fig. 4. Polygyra vultuosa. 

 XLI. Stenotrema monodon. The upper transverse line represents the variety 

 FRiiTERNA, the two Central transverse lines the var. Leah. 



