JIUREX.— Plate IV. 



stained in places with ruddy spots ; canal rather elon- 

 gated, sometimes shorter, recurved. 



Valenciennes, Kiener, Icon. Coq. viv. p. 49. pi. 41. f. 1. 



Hal. Gulf of Mexico. 



This very interesting shell, of which a worn stunted ex- 

 ample is represented in the ' Conchological Illustrations,' 

 fig. 30, under the erroneous title of Murex tm'binatm, was, 

 I believe, originally distinguished by Mr. Sowerby by the 

 name of Murex fidvesceiM ; no description, however, ap- 

 peared, and as the name was subsequently cancelled from 

 the catalogue, I am obliged to yield to M. Valenciennes 

 the honom- of having first introduced the species. 



The frond-Ukc spines of the Murex spinicostata are of a 

 sharp simjale structm'c, exhibiting no indication of being 

 foliated ; but ai-e singularly characterised in being armed 

 with a small prickle on each side at about one-third of 

 their entu-e length from the top. Tliis character can, how- 

 ever, only be recognised in such specimens as have the 

 spines well developed. 



Species 19. (Mus. Taylor.) 



Murex eufus. Mur. testa trigono-ovatd, mhfimformi, 

 spird mediocri ; mifradibm transversim leviter Uratis, 

 et granoso-striatis, inter varices tuberculatis ; trifariam 

 varicosis, varidbus, unisenatimfrondosis,frondisplano- 

 rmnpressis, regtdaribus, elegantissime foliatis ; rufo- 

 fuscd; aperturd parvd rotundatd, sub-impressd. 



The bed Murex. Shell triangidarly ovate, somewhat 

 fusiform, spu'e middling ; whorls transversely ridged 

 and gTanosely striated, tuberculated between the va- 

 rices ; three-varicose, varices siu'raounted by a single 

 row of flatly compressed, regular, very elegantly foli- 



ated fronds ; reddish-brown ; aperture small, rounded, 



somewhat impressed. 

 Lamarck, Anim. sans vert. (Deshayes' edit.), vol. ix. p. 574. 

 Hab. Indian Seas. 



This species is chiefly distinguished by its three single 

 rows of elegant leaf-like fronds, some of which seem to be 

 coated internally ^vith one or more pecidiai- laminse of ena- 

 mel. There is a very delicate small white variety of this 

 shell with a pink apex. 



Species 20. (Mus. Cuming.) 



Murex palmiferus. Mur. testd fusiformi-oblongd, spird 

 subekmgatd, acuminato-turritd ; anfractibus tranwersim 

 Uratis et striatis, tuberculis duobus prominentibm inter 

 varices armatis ; trifariam varicosd, varicibns subin- 

 crassatis, uniseriatim frondosis, frondis bi'evibus, sub- 

 compressis, sape lateralite.r Jimbriato-conuexis ; roseo- 

 fuscescente aid albidd; canali brevmsculo, recurvo ; la- 

 bro externa denticulato. 



The branch-bearing Murex. Shell fusiformly oblong, 

 spire rather elongated, acuminately tm-reted ; whorls 

 transversely ridged and striated, armed between the 

 varices with two prominent tubercles ; three-varicose, 

 varices somewhat thic|i;ened, furnished with a single 

 row of short rather compressed fronds, often fimbriately 

 connected at the side ; pinkish brown or white ; canal 

 rather short, recurved ; outer Up denticulated. 



Sowerby, Pro. Zool. Soc, 1840. 



Hab. North Australia. 



This species may be recognised by its short compressed 



fronds, which range for the most part so closely side by 



side as often apparently to form a connected leaf-Eke friU. 



