EXPLANATION OF PLATES, VOL, 28. 219 



FIGURES PAGE 



8, 9. Nesopupa cocosensis Dall. Cocos Island. 8, 



terminal genitalia. 9, radula 207 



10, 11. Lyropupa perlonga Pse. Nuuanu, Oahu. 10, 



genitalia (ovotestis omitted). 11, radula 205 



12, 13. Nesopupa newcomhi Pfr. Kalihi, Oahu. 



12, radula. 13, genitalia 206 



Drawn by H. B. B. 



Plate 29. 



ap, appendicular arm of penis (penial caecum in pi. 5, fig. 8). ap' or 

 apg, penial appendix, be, spermathecal sac. eg, cl, atrium, dh, herma- 

 phroditic duct, ep, epiphallua. ep^, epiphallar arm of penis, ga, albu- 

 men gland, gh, ovotestis. ol, free oviduct, ov, uterus, pd, spermathecal 

 stalk, pf, carrefour. pr, prostate, re, rp, penial retractor, rs, sperma- 

 thecal sac. ut, uterus, va, vagina, vd, vas deferens. 



FIGURES PAGE 



1. Vallonia costata Miill. Genitalia after Steen- 



berg (1917) 195 



2. Pyramidula rupestris Drap, Genitalia after 



Watson (1920) 198 



3-5. Pleurodiscus halmei P. & M. After Watson 

 (1920). 3, genitalia. 4, penis and ac- 

 cessories. 5, spermatozoon 198 



6. Acanthinula aculeata Miill. Genitalia after 



Steenberg (1917) 196 



Plate 30. 



All figures after Steenberg (1925). Labels 

 as in plate 29. 



1. Pupilla nniscorum L. Genitalia 199 



2. 2a. Orcula dolium Drap. 2, genitalia. 2a, base 



of spermoviduct with cul-de-sac (C SO) .. 201 



3. Modicella avenacea Brug. Genitalia. 4, 



stomach 202 



5, 6. Sandahlia cylindrica Mich. 5, genitalia. 



6, carrefour 202 



7. Orcula dolium Drap. Jaw 201 



8. Pupilla muscorum L. Jaw 199 



Plate 31. 



All figures after Steenberg (1925). Labels 

 as in plate 29. 

 1. Ahida secale Drap. Genitalia 202 



