STROMBUS.— Plate XVIII. 



rcddish-fawii, encircled with freckled ribands, colu- 

 mella and interior of the aperture white. 

 LIXN.EUS, Syst. Nat. (12th edit.) p. 1 209. 

 IM. Philippine Islands ; Cuming. 



As in many other instances, it is not jiossible to decide 

 whether the shell which Lamarck and others refer to the 

 Linnrean species is the correct type. The diagnoses of the 

 ' Svslema Naturae ' are often too brief to fix the identity 

 of the species, which is not unfrequently illustrated by re- 

 ference to two or more figures of different specific cha- 

 racter. S. manjiimtus, though differing so materially in 

 form, has very much the appearance of a longitudinally 

 compressed variety of S. mcc'mctm. 



Species 50. (Mus. Saul.) 



Stro.mbus lahiosus. Slromb. testa subtrigono-ovatd, basi 

 attenuald ill suhcontortd, spird acuminata, aufradibus 

 iransveraitfi creberrime sulcatis, superne obtuse angula- 

 tis, ad angidum profuse plicato-nodatia, colmiielld valde 

 catlosd, labro conspicue alato, incrassato ; fulvo-spa- 

 dlced, columella et apertura: fauce eburneis. 



The rrLL-LiPPED Strombus. Shell somewhat triangu- 

 larly ovate, attenuated and slightly twisted at the 

 base, s])ire acuminated, whorls transversely very 

 closely grooved, obtusely angled round the upper 

 part, profusely pbcately noduled at the angle, colu- 

 mella very callous, lip conspicuously winged, thick- 

 ened; fnlvous-fawi, columella ami inti-rinr of the 

 aperture ivory-white. 



Gkay, Wood Index Test. Supp. pi. 4. 

 Hab. Cagayan, Island of Mindanao, Philippines (in sandv 

 mud at the depth of twenty-five fathoms) ; Cuming. 



The detail of sculpture in this species is very similar to 

 that in S. 



Species 51. (Mus. Cuming.) 



Strombus Isabella. Stromb. testa sublrigono-ovatd, 

 spird brevi, apice acuta, aiifractibus leembus, basi sul- 

 rafis, superne rotundatis, prope apicem sidcatis et va- 

 ricosls, columelld cnllosn, labro subalato, simplici ; 

 sordide fulvo-fuscd, hnmuculatd, interdmn autem raro 

 fasciatd, columelld et aperturce fauce albis. 



The Isabella Strombus. Shell somewhat triangularly 

 ovate, spire short, sharp at the apex, whorls smooth, 

 grooved at the base, rounded at the upper part, 

 grooved and varicose near the apex, columella callous, 

 lip slightly winged, simple ; dirty fulvous brown, un- 

 spotted, sometimes, but rarely, banded, columella ami 

 interior of the aperture white. 



Lamarck, Anim. sans vert. (Deshayes' edit.) vol. ix. p. 7(»n. 

 Eadem var. Strombus tanriatus, Quoy. 



Ilab. Philippine Islands (on the reefs at low water) ; 

 Cuming. 



Notwithstanding the similarity of foi-ui between this 

 species and S. canarium, thei-e can be little doubt of their 

 being distinct. The shell is not so thick in substance, 

 and there is a marked difference in the growth of the lip, 

 the most characteristic part of the shell in Strombus. 



