VE RTA GUS. 



Plate IV. 



Species 16. (Fig. a, b.) 



Vertagus articulatus. J'er. testa pyramidali, tiu-rila, 

 fidoa, f/isco macula id ; aiifractibiis nnmerosis, jjluiui- 

 latis, sitpcrne subaugulatis, ad suturam tuberculatis, 

 medio costis iiKPqiialibi/s moniliferis angulatis cinctis, 

 ultimo dorso ad medium clevato; apertiirdubliqud, labro 

 ad, spirant elevato, columelld antice laminald, cauali 

 valde retrurso. 



The articulated Vi.htagus. Shell pyramidal, tur- 

 I'eted, light-browu, spotted with dark ; whorls nume- 

 rous, rather flat, slightly angulated above, tubercu- 

 lated at the suture, girt in the middle with beaded 

 angular ribs, the back of the last elevated in the 

 centre ; aperture oblique, outer lip raised at the spire, 

 columella laminated in front, canal bent strongly back- 

 wards. 



A. Adams and Reeve. 



Hab. East Indian Archipelago. 



Species 17. (Fig- ", b.) 



A^ERTAGUs BiTUBERCULATL's. Fev. testd pupafumi, al- 

 bidd, tennissiine striatd ; anfractilms superne tnbercidis 

 magnis dupU'catis armatis, infra eostd moniliferd cinctis 

 (ultimo tribus); aperturdobliqiid, columelld obscure niii- 

 pliculd, ad marginem laminald, caiiali valde retrorso. 



The bituberculated Vertagus. Shell pupiform, 

 whitish, very finely striated ; whorls armed above 

 with large doubled tubercles, girt beneath with a 

 beaded rib ; ajierture oblicpie, columella obscurely 

 uniplicate, laminated at the margin, canal strongly 

 recurved. 



Sowerby. 



Hab. Australia. 



The large double tubercles on the upper part of the 



whorls in this shell serve to distinguish it from all others 



of the group to which it belongs. 



Species 18. (Mus. Cuming.) 



Vertagus Cumingii. Ver. tesld ventricosd, l(evi, solidd, 

 albidd, maculis strigisque incequalibns rubro nigrescen- 

 libus pictd ; aiifractibas panlo converts, superioribus 

 tuberculatis el cancellalis ; aperturd ovali, columelld 

 postice uiiiplicatd, labro expaiiso, arcnato, margine 

 crenulato, canali valde retrorso. 



Cuming's Vertagus. Shell ventricose, smooth, solid, 

 white, painted with unequal blackish-red spots and 



stripes; whorls slightly convex, the upper one tuber- 

 culated and cancellated ; aperture oval, columella with 

 one plait at the back, outer lip expanded, curved, 

 with crenulated margin, canal strongly recurved. 



A. Adams. 



Hab. Torres Straits. 



Although this species belongs to the same group with 

 V. aluco and V. Sowerbii, the differences will be perceived 

 at a "lance. 



Species 19. (Mus. Cuming.) 



Vertagus vulgaris. Ver. testa ventricosd, solidd, pal- 

 lide fulvd ; anfractibus longitudinaliter pUcatis, plicis 

 validis, magnis, incisis, infra subevaiiidis, ultimo an- 

 fractu subdepresso ; aperturd obliqud, angustd, labia 

 interna crasso, calloso, columelld uniplicato, canali 

 breviusculo, leoiter retrorso. 



The common Vertagus. Shell ventricose, solid, pale- 

 fawn ; whorls longitudinally plaited, plaits strong, 

 large, incised, partly disappearing beneath, last whorl 

 rather depressed ; aperture oblique, narrow, inner lip 

 thick, callous, columella with a plait, canal rather 

 short, slightly recurved. 



Schumacher. 



Ceritldnm Vertagus, Linnfeus. 



Hid}. Moluccas and Philippines. 



Species 20. (Mus. Cuming.) 



VEKTiGUS PULCHER. Ver. testd pyramidall, solidd, pal- 

 lida, ad suluram perelevatim nodulosd, inter Modulus 

 nigra maculatd, omnino minuti: granosd el cancellald ; 

 aperturd brevi, labia interna uniplicato, antice lami- 

 nato, labro arcuata, canali abrupte ad dorsum, rejlexo. 



The beautiful Vertagus. Shell pyramidal, solid, 

 pale, with strongly raised nodules at the suture, 

 spotted with black between the nodules, all over mi- 

 nutely granulated and cancellated ; aperture short, 

 inner lip one-plaited, laminated in front, outer lip 

 arched, canal abruptly turned up to the back. 



A. Ada.ms. 



Hab. N. Australia. 



A very beautiful shell, resendjiiiig /'. obrliscus. It is 

 minutely cancellated in every part, and a black spot be- 

 tween each of the nodules. 



March. 186S 



