326 JOURNAL OF CONCHOLOGY, VOL. tO, NO. II, JULY, 19O3. 



Fam. BuccinidiV. Sub-fam. Ebiirniiia;. 

 Macron H. & A. Ad., 1858. 



'Operculum unguiculate, not purpuroid, nucleus apical. Shell solid, 

 oblong, roughish, chalky-white, with a thick olive or black epidermis; 

 spire elevated, whorls deeply channelled at the sutures, columella 

 rugulose, white, a callus more or less developed at the upper part, 

 outer lip thin, toothed near the base, this so-called tooth being at the 

 junction of the revolving spiral groove on the last whorl, just above the 

 base.' 



In Tryon,' five species alone are admitted of this genus; exclusive 

 of AT. ceihiops Reeve, erroneously referred to Purpura. The follow- 

 ing is, therefore, a corrected list: — 



4. M. livida H. & A. Ad. 

 V M. commoda H. & A. Ad. 



1. M. keUettii A. Ad. 



2. J/, (zthiops Reeve. 



3. M. -ivrightii H. Ad. 

 (including M. stereoglypta Sow.) 



I. Macron kellettii. 



'Fseudoliva kellettii K. Adams, Proc. Zool. Soc, 1853, p. 185. 



,, „ Sowb., "Thes. Conch." {PseudoIiva),^\. 116, f. 12. 



Macron kellettii K. Adams, "Gen. Recent Mollusca," vol. i, p. 132. 

 P. testa ovata, solida, snbperforata, epidermide fusco-villosa tecta; spira 

 promitiula, anfractilnis rotundatis, suttira canaliculata, anfractu ultimo 

 transversim sulcatd, sulcis postice evaiiidis, antice valde disti/ictis, unica 

 profunda^ in dente sulcata, ad labruni, terniinata; apertura ovali, 

 columella postice callosa, antice Jlexuosa, product a, labro postice inflexo, 

 antice sinuato-dentato. 



Hab., ? 



'I am indebted for this species to Professor Edward Forbes, who, 

 although himself describing the shells collected during the voyage of 

 the Herald and Pandora, insisted upon my describing the species 

 when he heard I was preparing a monograph of the genus' (Arthur 

 Adams). 



This fine and still rare species comes from the Gulf of California, 

 when in good condition it is always completely covered with a dark, 

 thick epidermis, the shell itself being white. 'ihe surface is spirally 

 encircled with grooves, those towards the base being the most pro- 

 nounced, especially in one instance, the upper ones being very 

 obscure — the rounded sutural canaliculation is also noteworthy. A 

 fine example longitudinally measures nearly 3 inches." 



1 Tryon, "Man. Conch.," vol. 3, p. 214. 



2 The specimen in Coll. Dennison, a very fine one, with operculum, was sold at Stevens' 

 Auction Rooms on 24th April, 7865, on the first of the six days' sale, being numbered lot no. It 

 realized £5 55. odi, and is now in the Liverpool Museujn. 



