23 



plico-striatis ; ad penpheriam angulatd tricarinatu, carind medid 

 prominente, majore, creniferd ; cingv/o et carinis maculis rvfis 

 subquadratis ornatis ; umbilico patiilo, creniilis parvis albis cincto. 

 Alt. 6, diam. 14 lin. 

 Hab. Ceylon ; north-vvest coast of Australia. 

 Cab. Curaing and Hiuds. 



Possesses the general contour of S. perspectivum, but is thinner ; 

 the \vhorls are slightly tumid, and fumished ahove with a flat smootli 

 girdle, ornamented with somewhat distant rufous spots. The most 

 prominent keel is characteristically covered vvith small tubercnlar 

 crenulations. When placed on its base the apex is rauch inclined, 

 and the general direction obliąue. The umbilicus is £omewhat less 

 patulous than in S. perspectivum, and neatly encircled with numerous 

 white and smaller crenations. The umbilical space is destitute of 

 ribs, folds, or keels, bearing aloue the marks of the striae of growth 

 and a thin horny epidermis. 



4. SoLARiuM QUADRicEPs. Sol. tcstd orbiculūto-discoided ; an- 

 fractibus guadriseriatim cingulatis ; cinguUs tuberculis gnadratis, 

 planulatis, approximatis instructis, inferiore majore, et cum supe- 

 riore rufo picto ; ad basiii tumidd, ared mediand radiativi plicatd ; 

 umbilico patulo, crenis magnis f uscis cincto; ared umbilicali l<evi. 

 Alt. 5, diam. 11 lin. 



Hab. Bav of Panama ; in five fathoms, among mud. 



Cab. Belcher. 



Very closely allied to S. granulatum, from which it will be found 

 to difFer in the character and relative proportion of the granular gir- 

 dles. A single and perhaps rather small specimen was alone obtained, 

 ■vv'hich is soraewhat more discoid than the above species ; four girdles 

 traverse each whorl, of \vhich the inferior is the largest, and the 

 tubercles closely set, liattened, and obliąuely sąuare ; the umbilicus 

 is rather more expanded, and the marginai tubercles are of a similar 

 size, but coloured of a reddish brown. S. ąuadriceps is an American 

 shell, and S. granulatum an Asiatic. 



5. SoLARiUM ASPERUM. Sol. tcstd discoided ; spira retusd; anfrac- 

 tibus superne planulatis, inferne rotundatis, vbigiie cingulis parvis 

 numerosis instructis ; cingulis tuberculis parvis asperatis ; umbilico 

 valde patulo ; ared angustd, Icevi. Alt. 1^, diam. 4į lin. 



Hab. Straits of Macassar ; in eleven fathoms, coarse sand. 



Cab. Belcher. 



A single dead specimen only was obtained, destitute of colour and 

 choked \vith sand. It is remarkable from its rounded base and its 

 very expanded umbilicus, which is proportionately larger than in any 

 other species. In S. perspectivum the umbilicus is equal to a third 

 of the diameter, but in the present species it is two-fifths. 



6. SoLARiuM DORSUosuM. Sol. tcstd conoided, Itevigatd, solidd, 

 fuscd, albo confuse nebulosd; anf r actibus planulatis, spiraliter seri- 

 atim sulcatis, spirce leviter striatis ; ad peripheriam suleis geminis 

 instructd; basi sulcatd, verstis centrum subtuberculatd ; umbilico 



