MUEEX.— Plate XXVI. 



The fi'onds are of a blackisli-brown colour, whilst the 

 remaining parts of the shell are pale gi-eenish or blueish 

 white. 



Species 114. (Mus. Cuming.) 



MuREX FESTivus. Mur. testa ohlongo-fusiformi, crassi- 

 Hsculd, transversini Uiieari-sidcatd, iuterstitiis Urisque 

 inteneiiientibus miniiti granulatis ; trivaricosd, vari- 

 cibns, incrassato-laminatis, recurvis, siiperne cristatls ; 

 fulvescente, litieis fiiscis subgeminis cingulatd ; aper- 

 turdparvd ; canali breviusctilo. 



The festive Mukex. Shell oblong-fusiform, rather 

 thick, transversely linearly-gi-ooved, gi'ooves and in- 

 tervening ridges minutely granulated ; three-varicose, 

 varices forming a recurved thickened lamina, crested 

 at the upper part ; pale fidvous browm, encu'cled with 

 fuie brown thread-like lines ; aperture small ; canal 

 rather short. 



Hinds, Mollusca,Voy.H.M.S. Sulphm-, p.9. pl.3. f.l3, 14. 



Ifab. Bay of Magdalena, California (di-edged from a sandy 

 floor at the depth of seven fathoms) ; Hinds. 



This species may be easily known by the pecidiarly re- 

 curved structui'e of the varices. 



Species 115. (Mus. Saul.) 



MuREX LAauE.\TUS. Miir. testd trigono-ovatd, utrinque 

 aUeuuatd, trausversim utuUque codatd, costis lavigatis, 

 tubercnlo magno inter varices; trivaricosd, varicibus 

 fimbriato-laminatis, quasi laqueatis ; albd, rosea tinctd ; 

 aperturd parvd, canali brevinsculo. 



The CHANNELLED MuREX. Shell triangularly ovate, at- 

 tenuated at both ends, transversely ribbed tb-ough- 

 out, ribs smooth, with a large tubercle between the 

 varices ; tlu-ee-varicose, varices tiiubriately laminated, 

 as if channelled ; white, tinged with pink ; aperture 

 small, canal rather short. 



Sowerbv, Pro. Zool. Soc, 1840. 



Hab. ? 



The varices of this shell are composed of a regidarly 

 channelled fi-iU to which I know of no similar struotm-e in 

 any other species. It has little or no affinity with the 

 Mitrex tripterus. 



Species 116. (Mus. Cuming.) 



MuREX DUBIUS. Mar. testd oblongo-ovatd, transversini 

 subt inter elevato-striatd ; anfractibus superne angulatis, 

 septifariam varicosis, varicibus squamatis, squamis so- 

 lidiusculis, ad angulmn grandibus promiuentibns, infra 

 gradatim minoribus ; albidd, nigricaute-fuscu varid; 

 labru iiitiis noduloso, canali brevisdmo. 



The doubtful Mueex. Shell oblong-ovate, transversely 

 finely elevately striated ; whorls angulated at the 

 upper part, seven-varicose, varices squamate, scales 

 rather solid, large and prominent at the angle, gra- 

 dually smaller beneath; whitish, variegated with 

 blackish brown ; lip nodidous \rithin, canal very short. 



SowERBY, Conch. Mus., f. 33. 



Mitrex acnleatus. Wood (not of Lamarck.) 



Ilab. Panama ; Cimiing. 



An abeiTant species of Murex scarcely coming within 

 the generic limit of the group. 



Species 117. (Mus. Cuming.) 



MuREX LAMINIFERUS. Mur. testd ovatd, spird angulato- 

 turritd; anfractibus veutricosis, superne angulatis, 

 octofariam varicosis, varicibus simpUcibus laminatis, 

 interstitiis costatis, quasi cancellatis ; albicante, balteo 

 angusto imico fuscescente snperne cingulatd ; canali 

 brevi. 



The laminiferous Murex. Shell ovate, spire angu- 

 larly tmTcted ; whorls ventricose, angulated roimd 

 the upper part ; eight-varicose, varices simple, lami- 

 nated, interstices ribbed, as if cancellated; whitish, 

 encircled roimd the upper part with a single narrow 

 brown belt ; canal short. 



Reeve, Pro. Zool. Soc, 1845. 



Hub. ? 



The ventricose growth of this shell is a little peculiar. 



Species 118. (Mus. Cuming.) 



Murex tetragonus. Mur. testd subrotundato-ovatd, 

 spird interduw, subpyrawidali ; franversim costatd, cos- 

 tis foraminatis, interstitiis confertim cancellatis ; qitad- 

 rifariam varicosd, varicibns soUdis, rotundatk, pone 

 cavemosis ; albd ; canali brevi, ascendente, peculiariter 

 ahrupte recurvo. 



The auADRANGULAR Murex. Shell somewhat rotim- 

 dately ovate, spii'e sometimes pjTamidal ; transversely 

 ribbed, ribs pierced with holes, interstices closely 

 cancellated ; four-varicose, varices solid, rounded, ca- 

 vernous behind ; white ; canal short, ascending, pecu- 

 liarly abruptly curved back. 



Broderip, Pro. Zool. Soc, 1832. 



Eadem. Murex breviculus, Sowcrby, Conch. Ul., f. 37. 



Hab. ? 



I cannot discover any specific difference between the 

 Murices tetragonus and breviculus; it is a species in which 

 the gi'owth is more p^Tamidal in some examples than in 

 others, but the sculpture is invaiiable the same. 



