GASTEROPODA PULMONEA. 333 



When the crescent of the aperture is higher than it is wide, a 

 disposition which always obtains when the .spire is oblong or elon- 

 gated, it constitutes the 



BuLiMus Terrestris, Brug. 

 Which requires a still further subdivision: 



BuLiMjjs, Lam. 



Margin of the aperture tumid in the adult, but without denta- 

 tions. 



Hot climates produce large and splendid species, some of which 

 are remarkable for the volume of their ova, the shell of which is of 

 a stony hardness^ and others for their left shell. 



Several moderate-sized or small species are found in France, 

 one of which, the Helix dccollata, Gm. ; Chemn., cxxvi, 1254, 

 1257, has the singular habit of successively fracturing the whorls 

 of the summit of the spire. This is the example referred to, as 

 a proof that the muscles of the animal can be detached from 

 the shellj for at a particular epoch, of all the whorls of the spire 

 originally possessed by this Bulimus, not a single one re;- 

 mains(l). 



Pupa, Lara. 



Summit of the shell very obtusej the last whorl, in the adult, 

 narrower than the others, giving it the form of an ellipsoid, or 

 sometimes almost that of a cylinder; the surrounding margin of the 

 aperture tumid and emarginated on the side next to the spire by the 

 preceding whorl. Small species, inhabiting wet places, among 

 mosses. Sec. 



Sometimes there is no dentation(2). 



(1) Add Helix ovalis, Gm. , Chemn., IX, cxix, 1020, 1021; — H. oblonga,Ih., 

 1022, 1023;— i?. trifasciata. Id., CXXXIV, 12\5;—H. dextra, lb., 1210, 1212;— /T. 

 interrupta, lb., 1213, 1214;— /T., lb., 1215;— /T., lb., 224, \2'25s—H.^perversa,ld., 

 CX and CXI, 928—937;—//. imersa, lb., 925, 926;—//". contraria, Id., CXI, 938, 

 939;— H.lxva, lb., 940 and 949;— /f. labiom, Id., CXXXIV, 1234;— //., lb., 1232; 

 H., lb., 1231;— /f. ere toea. Id., CXXXVI, 1263;— H. pudka. Id., CXXI, 1042;— 

 H. culcarea. Id., CXXXV, 1226. 



Bulla auris Malchi,L., Gm., lb., 1037, 1038, V, lb., 1041. 



Bulimus columba, Brug., Seb., Ill, Ixxi, 61; — Bui. fasciolatus, Oliv., Voy., pi. 

 xvii, f. 5. For the small species of France sec Draparnaud, Moll. terr. et fliiviat., 

 pi. iv, f. 21—32. 



(2) Bulimus lahrosus, Oliv., Voy. pi. xxxi, f. 10, A, B; — Pupa cdentula, Drap. 

 in, 28, 29; — Fupa ohtusu. Id., 43, 44; — Bui. fusus,, Brug'. 



