Irish Xatiralist. Vol XVII.] 



[Plate 4. 



cbid 



10^ 



VlTRIXA PVRKXATCA. 



A, B. C. vShell. D. Shell with animal extended. E, F, G, H. Dissections of 

 Internal Oro-ans (for references see text of paper). K. Reproductive or<ians of 

 V pellucida. J. INIaxilla. L, iNI, X. Radula Teeth 



The uiicronieter scale refers to L, ]M, X onlv. 



To face page 94. ] 



