48 TERRESTRIAL AIR-BREATHING MOLLUSKS. 



Taking, therefore, the whole series of known Pulmonata Geophila, the 

 first grand division is based on the absence or presence of a jaw. Of 

 the former are the following : Testacella, 1 Daudebardia* Streptaxis* 

 Rhytida* Diplomphalus, 5 Strebeiia? 6 Glandina? Petenia? 8 fyriraxis? 9 

 Streptostyla, Ravenia? 11 Strepstostele, Cceliaxis? 19 Gonospira, 1 * Gib- 

 bus ? 16 En nea, 16 Vaginulus. " 



All the above have aculeate marginal teeth ; the lateral teeth are 

 always absent ; the centrals in some of the genera. 



The following genera have quadrate marginal teeth : Onchidium 

 Peronia, 19 Buchanania? 



The second grand division contains those genera having a jaw. In 

 this division also we find some genera with aculeate, and some with 

 quadrate, marginal teeth. 



Of the former are : Limax^- Ibycus, Parmacella, Tennentia, Mari- 

 ella? 25 Parmarion, Dendrolimaxf Phosphorax? Urocyclus? (I know 

 nothing of the position of Othelosoma, Aspidorus, and other problemati- 



1 Heyneraann, Malak. Blatt. X. PI. II. Fig. 5. 



2 Golclfuss, verh. Naturh. Vereins der preuss. Rheinl. und Westphalens, 13th year, 

 1856, PI. VI. Fig. c. ci. 



3 Heynemann, Malak. Blatt. XV. PI. IV. Fig. 2. 



* Semper, Nachr. der deut. Malak. Gesellschaft II. 102. 



6 Fischer and Crosse, Journ. de Conch., XXI. 21, PI. III. Fig. 8. 



6 Jaw and dentition unknown. 



7 See this work. 8 j aw an d dentition not actually known. 



9 Jaw and dentition not actually known; as restricted, the genus may be more correctly 

 placed near Stenogyra. 



10 Fischer and Crosse, Moll. Mex., p. 16, PI. IV. Fig. 2. 

 n Jaw and dentition not actually known. 



12 Heynemann, Nachr. mal. Gesel. I. 20, 177, Fig. 5. 



13 Jaw and dentition not actually known. 



i* Bland and Binney, Amer. Journ. Conch., V. 37, PI. XI. Fig. 1, photographed. 



1 B No doubt like the last. 



16 Heynemann, Nach. Mal., Gesel. I. 20, 177, PI. XX. Figs. 3, 4. 



" See Stolicska, Q. Journ. As. Soc. Bengal, n. s. XLII. Pt. II. p. 33-37. The name 

 Vaginulus is restricted by him to the agnathous species, while Veronicella includes those 

 furnished with a jaw. 



18 Bland and Binney, Ann. Lye. N. H. of N. Y., X. p. 340, PI. XVI. Figs. 3-5. 



is Quoy, Voy. de 1'Astrolabe, PI. XII. 



20 Jaw and lingual unknown. 



2 1 See this work. 



2 2 Heynemann, Malak. Blatt. X. 142, PL I. Fig. 3. 

 2 8 Semper, Phil. Archipell., 90. 



a* Semper, 1. c. 1, PL VI. Fig. 17. 



25 ib. 12. Ib. 9,-Pl. VI. Fig. 16. 



y Heynemann, Malak. Blatt. XV. PL I. Fig. 1. 



28 Jaw and tongue not known. 



29 Heynemann, Malak. Blatt. 1866, 70, PL XI. as Parmarion flavesceus. 



