152 CANTHARIDUS. 



suture in a conspicuous manner ; granules rounded, subol^solete ; 

 apex acute, aperture obliquely quadrate, smooth, nacreous, of a 

 rosy silver hue, with one conspicuous angular groove in the 

 middle ; columella rounded, truncate below, not tuberculate ; base 

 convexly rounded, subumbilicate, elegantly Urate, the lir?e being 

 granular and alternating lai-ge and small, tessellate and radiately 

 striate. Alt. 18, diam. 14 mill. 



The young are distinctly umbilicate. Many specimens have be- 

 tween the larger lir^ smaller ones on the whorls of the spire. The 

 species differs especially from all previously described in the roundly 

 convex base, and non-tuberculose columella. It conies very near to 

 T. zebrides Ad. which is common at Moreton Bay, and with which it 

 has been previously confounded {Tenison- Woods). 



Moreton Bay. 



J. E. Tenison-Woods, in Proc. Linn. Soc. N. S. W. iv, p. 109 

 (1880). 



Thalotia zebuensis a. Adams. Testa elevato-conoidea, per- 

 forata, atro-fusca, fasciis longitudinalibus ornata, transversim sul- 

 cata ; anfr. planulatis, ultimo rotundato, basi convexa ; labio sub- 

 recto, antice reflexo, dilatato ; apertura subcirculari, intus alba ; 

 labro intus lievi, atro-marginato. (J. Ad.) 



San Nicholas, Id. of Zebu, in sandy mud, 6 fms. {Cuming.) 



A. Ad. in P. Z. S. 1851, p. 172. 



Thalotia strigata A. Adams. Testa turrita-conica, perforate, 

 albida, fasciis latis rufo-fuscis radiata ; anfr. in medio angulatis, 

 porcis transversis subgranulosus, interstitiis longitudinaliter striatis 

 ornata, basi convexa, concentrice porcata ; umbilico aperto ; aper- 

 tura subrotundata; columella subflexuosa, basi truncata ; labro 

 intus lirato, margine crenulato. {A. Ad.) 



Swan Point, N. Australia {Drlng). 



A. Adams, P. Z. S. 1851, p. 173. 



Thalotia zebrides A. Adams. Testa turrito-conica, subjDer- 

 forata, virescenti, lineis atropurpureis longitudinalibus ornata, 

 porcis transversis confertis sculpta ; longitudinaliter striata, basi 

 convexa ; umbilico subobtecto ; columella sinuata, callo terminata ; 

 labro intus lirato, margine atro-purpureo articulato. {A. Ad.) 



Habitat unknoivn. 



A. Adams in P. Z. S. 1851, p. 173. 



Thalotia suturalis A. Adams. Testa conica, subperforata, 

 virescenti, lineis purpureis longitudinalibus undulatis ornata ; trans- 



