GASTEROPODA PULMOXEA, 35 



the shell; for at a particular cpocli, of all the whorls of the spire 

 originally possessed by this Bulimiis, not a single one remains*. 



Pupa, Lam* 



Have the summit of the shell very obtuse ; the last whorl, in the 

 adult, becoming again narrower than the others, giving it the form of 

 an ellipsoid, or sometimes almost that of a cylinder; the surrounding 

 margin of the apertute tumid and emarginated on the side next to 

 the spire by the preceding whorl. Small species, inhabiting wet 

 places, among mosses, &c. 



Sometimes there is no dentation |. 



More commonly there is one in that portion of the aperture 

 which is closed by the penultimate whorl J. 



It is frequently observed inside of the external edge||. 



Chondrus, Cuv. 



Have the aperture, as in the last mentioned Pup?e, indented on the 

 side next to the spine by the preceding whorl, and bordered with 

 salient laminje or teeth ; but the form is more ovoid, like that of a 

 common Bulimus. 



Some of them have teeth on the margin of the aperture §. 



Others are furnished with more deeply seated laminae^. 



Here terminates that series of terrestrial Helices, the adult shells of 

 which have a tumid margin round the aperture. 



Succinea, Drap. 



Have the shell oval, and the aperture higher than it is broad, as in 

 Bulimus, but larger in proportion, and the margin of the aperture 



* Add Helix ovalis, Gm., Chemn., IX. cxix, 1020, 1021 ; — H. oblonga, lb., 

 1022, 1023 ;— ff. trifasciafa, Id., CXXXIV, 1215 ;— Jff. dexira, lb., 1210, 1212 ;— 

 H. inferrupfa, lb., 1213, 1214; — H., lb., 1215 -,—11., lb., 1224, 1225; — /f. per- 

 versa, Id., CX and CXI, 928 — 937 ; //. inverse, lb., 925, 926 ; — H. confraria, Id., 

 CXI, 938, 939; — H. heva, lb., 940 and 949.— i/. lahiosa, Id., CXXXIV, 1234 ; — 

 H., lb., 1232 ,—H., lb.. 1231 ; H. cretacea. Id., CXXXVI, 1263;— i7. pudica, Id., 

 CXXI, 1042 ;— ff. calcirca. Id., CXXXY, 1226. 



Bulla auris Malcha, L., Gra., Tb., 1037, 103S, V, lb., 1041. 



Bidimus cohtmba, Brug., Seb., Ill, Ixxi, 61 ; — Bui. fasciolatus, Oliv., Voy., pi. 

 xvii, f. 5. Fortlie small species of France, see Draparnaud, Moll. terr. etfluviat., 

 pi. iv, f. 21 — 32. 



f Bulimus labrosus, Oliv., Voy. pi. xxxi, f. 10, A, B ; — Pupa edentula, Drap. Ill, 

 23, 29 ; — Pupa obtusa, Id., 43, 44 ; — Bul.fusus, Brug. 



X Turbo uva, L., Martini, IV, cliii, 1439 ; — Turbo muscorum, L. {Papa marginata, 

 Drap., Ill, 36, 37, 38); — Pupa muscorum, Drap., III. IG, 21 . {Vertigo cylindrica, 

 Feruss. ); — Pupa umbilicata, Drap. Ill, 39, 40 ; — P. doliulum, lb., 41, 42. 



II Eel. vertigo, Gm., {Pupa vertigo, Drap., Ill, 34, 35) i—^Pupa antivertigo, lb., 

 3 2, 33; — Pupa pygmcea, lb., 30, 31 ; — Bulimus ovularis, Oliv., Voy., XVII, 12, 

 a, b. 



§ Bulimm zebra, Ol., XVII, 10 : — Pupa tridens, Drap., Ill, 57; — Pupa variabilis, 

 lb., 55, 56. 



\\ Bulimus avenaceus, Brug., (Pupa avena) Drap., III., 47,48; — P. secale, Jh., 

 49, 50 ; — P. frumentum, lb., 51, 52 ; — Bulimus similis, Brug. ; — P. cinerea, Drap., 

 lb., 53, 54 ; — P. polyodon, IV, 1, 2 : — Helix quatridens,(Pupa quadr., Drap.) lb. 3. 



D 2 



