107 



perforata vel arete umbilicata : apertura perobliqua, circularis ; 

 columella arcuata ; labro acuto, simplici ; fauce submargaritacea. 

 Diam. f, alt. -j^ poll. Hah. Madeira. 



Has most of the characters of T. Fermoni., but is very much 

 smaller, wants the peculiar channelled shoulder of the whorls, 

 and the widely open umbilicus. 



Trochxts amcenus. Testa parvula, depressa, globoso-conica, 

 levis, nilida, fusca, punctis luteis ubique irrorata, et maculis 

 piceis cum flavidis alternantibus ad suturam et ad peripheriam 

 ornata : spira anfr. 4-5 convexis, ad suturam constrictis : basis 

 convexa, imperforata, concentrice striata : apertura sub-circu- 

 laris ; regione columellari complanata, alba; columella antice 

 dentifera; labro acuto, striate; fauce livida, margaritacea. Diam. 

 y^^, alt. y\ poll, Hab. Feejee Islands. 



A pretty shell, allied to some of the Mediterranean species, 

 like T. Lessoni. Its small size, minutely freckled surface, with 

 the articulated bands of black and yellow, may mark it. 



Trochus (Monodonta) colubrinus. Testa depressa, conico- 

 globosa, imperforata, olivacea maculis subquadratis hepaticis 

 tessellata, sulcis inequalibus minime profundis cincta: spira 

 anfr. 5, planiusculis, ultimo ad peripheriam obtuse angulato : 

 basis convexiuscula, regione centrali absque colorem : apertura 

 semi-circularis, columella acuta, antice truncata et dentem men- 

 tiente ; labro acuto, viridi ; fauce submargaritacea. Diam. |^, 

 alt. f poll. Hah. Madeira. 



This shell has the form and texture of Tr. umhilicaris. It 

 seems not to be an uncommon shell, but I find no description 

 of it. 



Trochus (Monodonta) instrtctus. Testa parva, elevata, 

 ovato-conica, arete perforata, albida et maculis dilute rufis prope 

 suturam picta : spira anfr. 5, convexiusculis, sub-imbricatis, 

 sutura profunda canaliformi sejunctis, liris acutis ubique cinctis, 

 interspatiis concinne clathratis : basis convexa : apertura oblique 

 semicircularis ; columella acuta, obliqua, in dentem terminante; 

 labro incrassato, intus sulcato, juxta columellam rugoso et emar- 

 ginato. Long, f , lat. -^^ poll. Hah. Pacific Islands. 



Trochus (Monodonta) atropurpureus. Testa parva, depressa. 



