44 Genitalia and Lingual 



13. The vaginal prostate. 

 13a. flagellum to same. 



13b. accessory gland to same. 



13c. accessory duct to same. 



13d. same as last with globular organ. 



14. The dart sac. 



15. The flagellum. 



16. The duct of the genital bladder. 



In the figures of dentition it will be understood that the general inten- 

 tion is to give («) one central tooth with its adjoining lateral, and (b) one 

 or two marginal teeth. The numbers of the teeth refer to their position in 

 counting from the median line of the membrane. This arrangement gives 

 as good an idea of the characters of the dentition as my space will allow. 



Plate I. 

 Tig. 



I. Bulimulus Lobbi, Rve. Dentitiou; a. lateral teeth : b, extreme marginal teeth. 

 II. Bulimulus Altoperuvianns, Rve. Genitalia. 



III. Bulimus foveolatus, live, a, central and lateral teeth: b, extreme marginals. 



IV. Dentition of II. 6, extreme marginals. 



V. Bulimulus rhodolarynx, Rve. b, marginals — first and extreme. 

 VI. Jaw oil. 



VII. Bulimulus primularis, Rve. 6, extreme marginal tooth. 

 VIII. Bulimulus Peruvianus, Brug. 



Plate II. 

 Fig. 



I. Pallifera Wetherbyi. Jaw. 

 II. Same; dentition, «. central and lateral teeth : 6, marginal teeth. 



III. Cylindrella brevis, Pfr. Genitalia. 



IV. Zonites scnlptilis, Bland. Dentition; b, extreme marginals. 

 V. Bulimus auris-sileni. Born. Genitalia. 



VI. Helix nucleola, Rang. Genitalia. 

 VII. Cylindrella sanguinea. Pfr. Genitalia. 



VIII. Strophia iostoma, Pfr. Dentition ; a, central and lateral teeth : b, marginal tooth : 

 c, extreme marginal tooth. 

 IX. Helix discolor, Fer. Genitalia. 



Plate III. 

 Fig. 



Lingual dentition of Liguus virgineus, Lin. 



A. From the least developed end of the membrane. The central tooth with the two 



lateral teeth and three marginal teeth. 



B. From near the centre of the membrane. 



C. From near the anterior end of the membrane; portions of two adjacent rows of 



teeth. 



D. From still nearer the anterior end of the membrane. 



E. Marginals from the same end ot the membrane as the last. 



F. Extreme marginal in profile. 



G. Extreme marginals. 



