LIGUUS. 401 



Doubtful Spkciks of Acoatina. 



Liffiius Firgineu3, Montfout, Conch. Syst, II, 423, Louisiana. (A. Firgineus, 

 ,1ay, WiiKATLKY. liuUmus vcxUlum, DkKay.) Tho species is from Haiti. 



AcJmtina Inhrica, HiNNKY. Sec Fcrussacia siibcyUndrica. 



Achatina biUlala, Pfr. See Olandina. 



Achnfina trimcala, Pfr. See GJandina. 



Achatina VaintzcDieiisis, Lea. See Glandina. 



Achat ilia rosea, Desiiayes. See Olandina truncata. 



Achatina striata, DeKay, is Glandina truncata. See Terr. Moll., IV. 139. 



Achatina snbula, Pfr. See Stcnogyra. 



Achatina Tcxasiana, Pfr. See Glandina. 



AcJuifina australis. Villa, N, Am., Disp., 19. Unknown to me. 



Aclmtina pelhicida, Pfr. Sec Blaimcria. See Vol. IV. 



Achatina gracillimn, Pfr. See Stcnogyra. 



Achatina fiammigcra. Say (ed. Binney, 29) = Orthalicus undatus. 



Achatina Jlammigera, FiiiRUSSAC. See Vol. IV. 138. 



Achatina mncronata, etc. , etc., Maine, Ravenel's Cat., 1874, 44, is a typograph- 

 ical error for Achatinclla mucronata of Maui. 



Achatina , Baffin's Bay. See Morch, Am. Journ. Conch., IV. 38. 



D. GONIOGNATHA. 



Jaw in separate pieces, the upper median one usually triangular ; marginal 

 teeth quadrate. 



LIGUUS, MoNTF. 



Animal heliciform, obtuse before, long and pointed behind ; mantle subcen- 

 tral, protected by a shell ; other characters as in Orthalicus, q. v. 



Shell imperforate, solid, elongate-conic, apex acuminated, variously fas- 

 ciated; whorls 7-8, the last equalling about one third the shell's length; 

 columella constricted, distinctly truncate in adult individuals ; aperture lunate- 

 oval, subangulated ; peristome straight, acute, its margins joined by an enter- 

 ing callus. 



But very few species of this genus are known, restricted to Cuba and Haiti. 

 One of them has, however, been quoted from Guiana, and another has become 

 naturalized in our Florida Subre^ion, having been introduced into the south- 

 ern extremity of the peninsula. 



Jaw thick, arcuate, ends rapidly attenuated, pointed; composite, being in 

 numerous, separate, free, imbricated, triangular pieces, 

 with sutures inclined obliquely^to the centre of the jaw, 

 so as to leave an upper median, angular piece ; other 

 pieces are soldered together above. Cutting edge with 

 no median projection, serrated by the lower angles of " jaw of L. ftr^meu*. 

 the oblique pieces. For more detailed description see 

 below, under Orthalicus, which has a similar jaw. I am not able to give a 

 figure of the jaw of the only species found within our limits, L. fasciatus. I 



VOL. IV. 26 



