SOLARIUM. 245 



mill." The figure neither displays the trochoid shape nor the 

 elevated spire attributed to the species. If a Solarium, it is an 

 abnormal one. The type is not recorded as present in the British 

 Museum catalogue of D'Orbigny's collection. 



planorbis, Blainv. Diet. Sc. Nat. xlix.js. 411. — "Small, white, 

 nearly flat, discoid, with scarcely tuberculated spiral sulci and trans- 

 verse striae. The very open umbilicus with a row of tubercles, the 

 last of which is notched. Mouth rounded." I cannot pretend 

 to identify a species from so inadequate a definition, the original 

 of which is in the French language. 



egenum, Gould, Proc. Bod. N. H. iii. p. 84 ; in Wilkes 

 Exploring Expedition. — "T. parva, ovato-conica, exalbida, sub- 

 margaritaceaj spira anfractibus 6 convexis, liris acutis 4 cinc- 

 tis, posterioribus granulatis ; basis convexiuscula, perforata ; um- 

 bilico scalariformi, ad ambitum acuto, crenulato ; apertura cir- 

 culars, labiis fere continuis. -fL-j inch." Gould remarks that it is 

 not strictly a Solarium ; yet nearer one in aspect than a Trochus, 

 closely resembles S. dealbatum, and in size, form, and colour, re- 

 minds one of Margarita ohscura. 



BiCAMSATVM, P/til. in Kttst. ed. Chemn. Sol. p. 23, pi. 3,./. 14. 

 — " T. depressa, strigis albis et nigris alternantibus picta : an- 

 fractibus lamssimis, superius carinato-angulatis, supra carinam 

 planis, infra earn plano-declivibus ; ultimo in peripheral acute 

 carinato : umbilico late infundibuliformi, striis elevatis radiantibus 

 conccntricisque cancellato, in ambitu crenulato : apertura exacte 

 rliombea. 1-1 J Hn. Chinese seas." Judging from the figure, I 

 much doubt its being a member of this genus. 



nanum, Koclt, Zeit. Mai. 1851, teste Philippi, in Kust. Chemn. 

 Sol.pl. 4, f. 5. — "T. depresso-globosa, alba, strigis radiantibus 

 rufis picta; anfractibus rotundatis, superius angulatis, cingulis 

 elevatis subgranulatis circa 4 in anfractibus superioribus ; basi 

 lrevi ; umbilico mediocri, infundibuliformi, margine crenato, intiis 

 striis elevatis radiantibus et concentricis granulato-decussato ; 

 apertura subrhombea. 2j-3j lin. Chili?" 



Architve, Costa, Mem. Acad. Napoli, 1844. — " T. orbiculato- 

 plana, albo-fiavidula, longitudinaliter sulcata, transversim crenu- 

 lata; anfractibus supra carinatis; umbilico amplissimo, denticu- 

 lato." 7^ mill. Tarentum. It is further said to be flat and 

 angular above, with a rounded mouth, and only fine denticulations 

 at its umbilicus. Possibly a form of stramineum. 



The Trochus perspeculaius of Meuschen was a Solarium : it is 

 thus inadequately described in the 'Zoophylaceum Gronovianum ' 



