littoriniDjE. 245 



rounded. The dentition corresponds with that of the Littor- 

 inidse. 



FossARUS, Philippi. 



Si/7i. — Phasianema, Wood. Maravignia, Aradas. Megalom- 

 phalus, Brusina. 



Distr. — 43 sp., including species of the subgenera. Mediter- 

 ranean, W. America, Polj'nesia, Japan, Red Sea. Fossil, 4 sp. 

 Miocene; Europe, i^. costo^i^s, Brocchi (Ixix, 39). F. ambiguus, 

 Linn. (Ixix, 40). 



Shell perforated, sculptured ; inner lip thin ; aperture semi- 

 lunate. Operculum not spiral. 



Animal with two frontal lobes between the tentacles. 



iSAPis, H. and A. Adams. Shell umbilicated, spire elevated, 

 cancellated or with revolving ribs, columella with a small median 

 tooth (almost obsolete in F. anomala). 4 sp. West Indies, 

 Mazatlan. F. anomala^ C. B. Ad. (Ixix, 41). 



rossARiNA, Adams and Angas. Aperture circular, inner lip 

 arcuated. 2 sp. Australia. ^.pa^uZa, Ad. and Angas (Ixix, 41). 



couTHOUYiA, A. Ad., 1860. Shell ovate, profoundlj'^ and widely 

 rimate ; spire acuminate; whorls convex, decussated, with 

 impressed sutures; aperture semiovate; inner lip straight, dilated 

 in front, outer lip arcuate, simple. Japan. 3 sp. F. decussata, 

 A. Ad. 



CONRADIA, A. Ad., 1860. Shell turbinate, rimately umbilicate, 

 spire somewhat elate ; whorls convex, carinated concentricall}' ; 

 aperture round the outer margin fimbriate, inner lip without 

 teeth ; umbilicus margined by a semilunar rib. 6 sp. Japan. 

 F. cingulifera^ A. Ad. 



GOTTOiNA, A. Ad., 1863. Lirate, solid, imperforate. 2 sp. 

 Japan. F. sulcifera, A. Ad. 



ciTHNA, A. Ad., 1863. Grlobosel}^ turbinate, thin, whorls smooth, 

 umbilicus margined. 2 sp. Japan. F. globosa, A. Ad. 



FOSSARIOPSIS, Laube, 18^0. Distinguished from Fossarus by 

 the closed umbilicus and the callous expansion of the inner lip. 

 F. rugoso-carmata, Klipst. Triassic. 



TUBA, Lea. Shell conical, umbilicate ; whorls rounded, can- 

 cellated ; aperture rounded, margin not continuous above ; 

 columella thickened and reflected at the base. F. alternata^ 

 Lea (Ixix, 43). Eocene ; U. S. 



Atresius, Gabb, 1869. 



Distr. — A. liratus, Gabb. Cret. ; Cal. 



Shell elongate, spire elevated ; whorls rounded ; aperture 

 ovate, slightly produced in front, outer lip entire, thin ; colu- 

 mella not callous, imperforate ; surface marked by revolving- 

 ribs. Possibly belongs in Cerithiidse. 



