GASTEROPODA PKCTIN'IBRANCIIIATA. 59 



A small species, the '/Y. >c!in< //-wr///'//?, L. ; Adans., 

 XII, 1 ; List., 642, 3:j, :>l. with a brown shell spotted with 



: y abundant on tin- o,ast of France*. 



I'M \-i \\' i ^ /. 



An oblong or ipointed slu-11, similar to that of several Hulimi and 

 Lvi! .-rture also higher than it i> widr. and furnished 



with a -tr. njj operculum ; base of the columrlhi sensibly flattened, 

 but no umhilu 



ibit the Indian Oivan. ami an- much Anight for by col- 

 lecton <>n account of the beauty of their colours. The animal is 

 provided with two long tentacula, with eyes placed on two tubercles 

 at their external base, and with double lips that are emarginated and 

 fringed, as well as the wings, each of which has three filaments f. 



AMPULLARIA, Lam. 



A round, ventricose shell, with a short spire, as in most of the He- 

 lices ; the aperture higher than it is wide, and provided with an oper- 

 eulum ; the columella umbilicated. 



inhabit the fresh or brackish waters of hot countries. The 

 animal has long tentacula, and eyes placed on pedicles at their base. 

 In the roof of the respiratory cavity, by the side of a branchial comb, 

 according to the observations of Messrs. Quoy and Gaymard, is a 

 large pouch, without an issue, that is filled with air, and which may 

 usidered as a natatory bladder J. 



The LANISTVE, Montf., are AmpullaricO, with a large, spiral, con- 

 voluted umbilicus. 



HELICINA, Lam.\\ 



Judging by the shell, the Helicinae are Ampullarice in which the 

 mnrcrin of t lie aperture is reflected^. 



\Vhrn this reflected margin is trenchant, they are the Ampul/ina?, 

 Blainv. ; and when it is in an obtuse ridge, the Otygirc?, Say. 



* Add, 7Vr/iiM labeo, Adnns., Seneg., XII, List., 68, 443; Troth. Pharaomus, 

 List., 637, 25 ; Tr. rusticus, Chemn., V, clxx, 1645, 46; TV. niyerrimus, Ib. 47 ; 

 7V. fiyii^tius, Id., clxxi, 1663, 4; TV. riridjtlus, Ib. 1677; TV. carntus, Ib. 

 1682; TV !'<.rn., \'I, ID, 20; Tr. asper, Chemn., Ib., ol\\i, 1582; Tr. 



rift-inns, Knurr.. IX-1., I, x, 7; Tr.gran,' \..'\\. . ,4 55; TV. 



croeu' .11, 12; Turbo atrafux, ('!icuin., V, clxxvi. 1754 55; 



iii, 177, , ^c. 



f /; i/y/iis, Chemn., IX, cxx, 1035, 1036 ; Helix solida, Born., XIII, 



18, 19. 



J llflix r/my)w' -t., 130 ; Bulimus vrrnu, Brag., List., 125, 26. 



Ainpinl.i r.iri.i.''.', Oliv., Vny. CM Tnni., pi. xxxi, f. 7, copied Blainv., Mnlac., 

 xxxiv. 



|| Montfort has changed the nauir //.//, i./.- 1 >: ['i'mimlta, but it has not been 

 adopted, arid cnn only be quoted as a -ynonymp. 



t The Hcl itriaf,-, Blainv., Malac., xx\ 



