Jaw and Lingual Dentition of Pulmonata. 195 



EXPLANATION OF THE PLATES. 



Fig. 



1. Bulimulus pallldior, Sowb. 



2. Helix aspera, V6r. 



3. Helix spinosa, I.ea. 



4. Limax montanus, Ing. 



5. Helix arrosa, Gld. 



Plate XII. 

 Genitalia of:— 

 FIO. 

 C. Helix septemvolva, Say. 



7. Ariolitnax Hemphllll. 



8. Helix crlspata, Fer. 



9. Ariollmax Anderson i, J. Q 



Coop. 



r. d. vas deferens. 



f. flagellant. 



e. epididymis, 



ov. oviduct. 



v. vagina. 



or. external orifice, 



pr. prostate. 



Plate XIII. 



Fig. 



A. Genitalia of Helix rufloincta, New. 

 d.s. Dart sac? 



B. Zonites cerinoideus, Anth. Central, lateral and marginal teeth of the lingual mem- 



brane. 



C. Genitalia of Amphibulima Kawsonis, Bl. 

 p. The retractor muscle of the penis sac. 



D. CoBoillanella Gundlachi, Pfr. Jaw. 



E. Orthalicus undatus, Brug. var. 

 Central, lateral and marginal teeth. 



F. Genitalia of II. Jamaicensis, Chemn. 

 e. The long epididymis. 



G. Same as D; enlarged still more to show the nature of the ribs. 

 H. Central, lateral and marginal teeth of same. 



I. Same. Transition and marginal teeth. 

 J. Strophia incana, Binn. Central, lateral, transition and marginal tectli. 

 K. Same of Helix Carpenteriana, Bl. 



Plate XIV. 



Fig. Lingual Dentition of:— 



A. Helix fringiila, Pfr. See also pi. xv, flg. A. 



B. Helix Jamaicensis, Ch. 



C. Helix Studeriana, Fer. 



D. Achatinella venusta, Mighels. 



E. Amphibulima Itawsonis, Bl. 



F. Glandina truncate, Say. 



Central and first-lateral tooth and part of the latter still more enlarged. 



G. Transition and marginal teeth of Achatinella textilis, Fer. 

 H. An inner marginal tooth of Achatinella obesa, Newc. 



