PURPURA. 



Plate XI. 



Species 52. (Mus. Cuming.) 



Purpura musiva. Furp. testa subfusifonni-ovatd, medio 

 angidntd, transvershn sMiliter striata, seriatim tuber- 

 culatd, tuherculis ad angulmn prominentihus, lahro 

 intm dentiadato ; alhidd, tubereulorum seriebtis alter- 

 natim aterrimis et rufo-fuscis, apertura fauce caru- 

 lesceiite. 



rHE MOSAIC Purpura. Shell somewhat fusiformly ovate, 

 angulated in the middle, transversely finely striated, 

 encircled with rows of tubercles, which ai'e prominent 

 on the angle, lip denticulated ivithiu ; whitish, rows 

 of tubercles alternately jet black and reddish brown, 

 interior of the apertiu'e blueish. 



Kiexer, Icon. Coq. vivantes, p. 38. pi. ix. f. 22. 



Hall. Island of Ticao, Philippines (on the reefs) ; Cuming. 



An interesting species, which may be easily recognized 

 by the alternating colom- of the tubercles, those on the 

 angle being reddish or light ehesnut brown, and of a more 

 prominent structm'e than those next in order, which are 

 black. 



Species 53. (Mus. Cmning.) 



Purpura trigona. Purp. testa ovatd, crussiuscnld, medio 

 gihbosd, utritique attenuatd, spird brevi ; aiifractibua 

 superne angulatis, trattsversim suleatis et liratis ; aper- 

 turd suhelofKjatd ; caruled et albd, fusco irregulariter 

 strigatd, columella et apertura faace lutescerde-albis. 



Ihe triangular Purpura. Shell ovate, rather thick, 

 gibbous, attenuated at both ends, spii-e short ; whorls 

 angulated round the upper part, transversely grooved 

 and ridged ; aperture somewhat elongated ; blue and 

 white, irregularly streaked with reddish brown, colu- 

 mella and interior of the apertm-e yellowish-wliite. 



Bab. Chuia and Jlalacca (under stones at low water). 



Chiefly distinguished by its stout triangular form. 



Species 5i. (Mus. Cuming.) 



Purpura rustica. Purp. testd ovatd, spird aadd, frans- 

 versim liratd et atriatd, liris plus minusve tuberculatis, 

 longitudinaliter subobscure pUcatd, lahro intus denti- 

 culato et sulcato ; longitudinaliter fusco strigatd, iii- 

 terstitiis plumbeis, liris interdum pallidefavescentibns, 

 tuberculis semper coccineo-nijis ; columella et aperturee 

 fauce auraidio-luteis. 



The rustic Purpura. Shell o\ate, spire shai-p, trans- 

 versely ridged and striated, ridges more or less tuber- 

 culated, longitudinally streaked with brown, interstices 



lead-colour, ridges sometimes tinged with pale yellow, 

 tubercles always deep scarlet-red ; columella and in- 

 terior of the aperture orange-yellow. 



Lamarck, Anim. sans vert. vol. x. p. 83. 



Bhb. Island of Luzon, Philippines (under stones at low 

 water); Cuming. 



M. Kiener, whose natural acuteness of perception seems 

 somewhat inferior to that of his predecessor Lamarck, has 

 figured an example of this species for an immature variety 

 of the P. u/idata; it is, however, constantly distinct. 



The Purpura rustica is uniformly smaller than the P. 

 imdata, and throughout all its variations of form between 

 the little tuberculated example represented by Kiener 

 (PL 3i. f. 81 c), and the nearly smooth specimen figured 

 in the accompanying plate, is forcibly characterized by the 

 scarlet-red colom'ing of the ridges on the tubercles. 



Species 55. (Mus. Cuming.) 



Purpura tujiulosa. Pmp. testd ovatd, snbventricosd, 

 spird breviusculd, anfractibus quadriseriatim tubercu- 

 latis, tuherculis rotundatis, imnidis, lavigatis, inter- 

 stitiis subtiliter sulcatis ; albidd, tuberculis nigricante- 

 fuscis, columelld et apertures fauce favicanfibus. 



The tumulous Purpura. Shell ovate, somewhat ven- 

 tricose, spire rather short, whorls encircled with four 

 rows of smooth round swollen tubercles, interstices 

 finely grooved ; whitish, tubercles blackish-brown, 

 columella and interior of the apertiu'e yellowish. 



Hab. Zanzibar (on the reefs). 



Easily distinguished by its prominent smooth rounded 

 tubercles, which have a curious swollen appearance. 



Species 56. (Mus. Cuming.) 



Purpura speciosa. Purp. testd ovatd, spird brevissimd ; 

 anfractibus mtperne depressis, triseriatim tuberculatis, 

 tuberculis timcronatis, acutis : albidd, quadris parvis 

 castaneo-fuscis undique tessellatd, zonk albidis inter 

 titberculos, columelld et apertura fauce auraidio-luteis. 



The beautiful Purpura. Shell ovate, spire veiy short ; 

 whorls depressed round the upper part, encircled with 

 three rows of shai-p-pointed tubercles ; whitish, tessel- 

 lated throughout with small chesnut-brown squares, 

 with white zones between the tubercles, columella 

 and interior of the apertm-e orange-yellow. 



Valenciennes, Zool. Humboldt's Voyage. 

 Purpura centiquadra, Duclos. 



Hab. Acapidco ; Humboldt. 



September, 18-10. 



