118 MONODONTA. 



would apply to several related species equally as well as to the one 

 described. A positively recognizable description, or details of differ- 

 ences, or a figure of the species, should be rigidly required." — Tryon^ 

 in Amer. Journ. Conch., i, p. 83. 



M. ciRCUMCiNCTA A. Adams. Testa ovato-conoidea, imperforata, 

 Ifevi, nitida, crassa, ciugulis rubris, albo viridi maculatis alternanti- 

 bus picta ; anfr. convexis ; columella basi tuberculata, dente magno 

 aciito terminata ; labro duplicato, intus lirato. {A. Ad.) 



Id. of Ticao, Philippines, on stones at low ivater. (Cuming.) 



A. Ad., p. Z. S., 1851, p. 175. 



M. TUBERCULATA A. Adams. Testa ovate-conoidea, imperforata, 

 crassa, viridescenti, cingulis tuberculorum oblongorum violaceorum 

 ornata ; anfr. convexis; columella basi trituberculata, canali paral- 

 lelo instructa, dente prominente acuto terminata ; labro duplicato, 

 intus lirato. {A. Ad.) 



Habitut unknotvn. 



A. Ad., P. Z. S. 1851, p. 175. 



M. RUGULOSA A. Adams. Testa ovato-conoidea, depressa, atro- 

 fusca, fasciis latis luteo-albis irregulai'iter picta, cingulis rotundatis 

 interruptis ornata; columella basi bituberculata, canali parallelo 

 instructa, dente magno acuto terminata ; labro duplicata, intus 

 lirato. (.4. Ad.) 



Habitat unknotvn. 



A. Ad., p. Z. S., 1851, p. 175. 



M. EXIGUA A. Adams. Testa parva, conoidea, undiilicata, 

 albida fusco variegata, cingulis transversis granulosis interstitiis 

 longitudinaliter liratis ornata ; anfr. parum convexis, ultimo sub- 

 angulato ; umbilico recto, dente valido acuto terminata; labro intus 

 sulcato. (A. Ad.) 



Japan. (Siebold.) 

 A. Ad., p. Z. S., 1851, p. 176. 

 May be a Euchelus, instead of a Monodonta. 



M. spiLOTA A. Adams. Testa parva, ovato-depressa, conoidea, 

 imperforata, lievi, nitida, viridi, maculis pallidus triangularibus ; 

 columella plana, alba, canali parallelo instructa, dente obtuso 

 terminata ; labro duplicato, intus lirato. (^1. Ad.) 



Habitat unknoivn. 



