ZIZYPHINUS.— Plate III. 



Species 19. (Mus. Cuming.) 



ZlZYPHlNCS ARMILLATUS. Zizi/pli. testi tmnido-conicd, 

 tenuiculd, versus apicem acuta, anfraclibus plauo-con- 

 rexis, nndique grano-Uratis, yranis creberrimis, cre- 

 natis ; Jlavescenie, aureo-rufescente pallide lentiginosd. 



The .jewelled Zizyphinus. Shell tumidly conical, 

 rather thin, sharp towards the apex, whorls flatly 

 convex, strongly grain-ridged throughout, grains very 

 close, crenated ; yellowish, faintly fi'eckled with golden- 

 red. 



Trochus armillatus, Wood, Ind. Test. Suppl. pi. 9. f. 5. 



llab. Tasmania. 



An exquisitely jewelled shell, freckled with light golden- 

 red, allied to the smaller Australian Z. splendidus. 



Species 20. (Mus. Cuming.) 



ZizyPHiNUs bicinCtULATUS. Zizyph. testa late depresse 

 conoided, anfraclibus concavo-declivibus, delude tu- 

 mido-rotundatis, spiraliler liratis, Uris duabus hasali- 

 bii.i valde prominentibus, omnibus dense plicaio-crena- 

 tis ; flaveseente, aiireo-rufo et albo prof use lentiginosd. 



The two-gikt Zizyphinus. Shell broadly depressly 

 conoid, whorls concavely sloping round the upper 

 part, then tumidly rounded, spirally ridged, two of 

 the basal ridges very prominent, all densely plicately 

 crenated; yellowish, profusely freckled with golden- 

 red and white. 



Trocliiis bicliigulatus, Lamarck, Anim. sans vert. vol. ix. 



p. 147. 



Trochus vinctus, Philippi. 

 ffab. Kaine's Island, Torres Straits ; Ince. 



Beautifully sculptured and freckled, the shell being 

 conically depressed with two of the ridges towards the 

 basal margin developed into conspicuous cords. 



Species 21. (Fig. a, b, Mus. Cuming.) 



Zizyphinus zonamestus. Zizijpli. testa umbilicatd, 

 acute conicd, tiunc depressd, nunc pyramidall, ad basin 

 acutanguld, anfraclibus concavo-declivibus, minute 

 subobsolete grano-liratis, inlerslitiis oblique subtilissinie 

 crenalatis ; Uris olivaceo-luteis, interslitiis ustulato- 

 brmmeis. 



The neatly-zoned Zizyphinus. Shell umbilicated, 

 conical, sometimes depressed, sometimes pyramidal, 

 sharjily angled at the base, whorls concavely sloping, 

 minutely rather obsoletely grain-ridged ; interstices 

 obliquely very finely crenulated, ridges olive-yellow, 

 interstices biu-nt-brown. 



Adams, Pro. Zool. Soc. 1S51, p. Ifi6. 



Hab. Honduras ; Dyson. 



In this species the ridges of fine granules are of a pecu- 

 liar olive-yellow colour, while the interstices, minutely 

 obliquely crenulated, are a rich burnt sienna. 



