MELVILL : GENERA PSEUDOLIVA AND MACRON. 32() 



there are many points of similitude between this heavy, thickly 

 shouldered species and the more elegant M. kellettli. 



4- Macron livida. 



Pseiidoliva livida A. Ad., Proc. Zool. Soc, 1854, p. 136. 

 '/*. testa ovali, cinerascetite, livida, spira obtusa, apice erosa, anfradibus 

 3-4, convexiiisciilis, transversim crebre striatis, aafradu ultimo antice 

 obliqiie-sulcato, sulco unico valde impresso ; apertura ovali, columella 

 alba, postice callo spirali instruda, antice oblique plicata, canali brevi, 

 aperta, labro 7nargine antice unidentato, intus Urate. 

 Hab., West Coast of Africa. Mus. Cuming. 



'Most like P. sepimenta Le Guill, but the callous spiral ridge is less 

 prominent, the inner lip is without the dark mark, the columella is less 

 produced anteriorly, the spire is obtuse and eroded, and the whorls 

 are rounded.' (A. A.) 



The locality as given above by Adams is entirely erroneous ; it is 

 the most common of the genus, and not rare off the Californian coast. 

 My examples, four in number, average 22 mm. in length. It is 

 entirely covered with a thick, swarthy epidermis, the whorls being 

 roundly channelled at the sutures. The mouth and columella, the 

 latter possessing a callus at the upper part, are shining white. Oc- 

 casionally the mouth is stained with reddish-brown. The operculum 

 is unguiculate, 



5. Macron commoda. 

 Pseiidoliva commoda H. & A. Ad., Proc. Zool. Soc, 1863, p. 430. 

 'P. testa ovato-fusformi, epidermide fusca velutina incrassafa obteda ; 

 spira aperturam cequaiite, anfradibus 5, cotivexiusculis, transversim 

 obsolete liratis, ultimo elongato antice sulco profunda spirali, in denteni 

 brevem desinente instrudo, sulcis tribus spiralibus ad basim ornato, 

 regione umbilicari impresso, lira valida spirali circumcindo ; apertura 

 ovata, intus fusca, labio albo, crasso, convexo, superne callo instrudo, 

 inferne subtortuoso ; labro intus lirato, margine acuto, intus albo. 



Hab., ? (Coll. Tyler). 



'This curious shell belongs to the same group to which P. kellettii 

 A. Ad., belongs, and to which the name Macron has been given by 

 the authors.' (H. & A. Ad.) 



I can obtain no more information as to this shell. 



* -X- * -K- * 



EXCLUDED SPECIES. 

 Pseuodoliva australis Sowb., Conch. 111. 



„ „ Sowb., "Thes. Conch.," vol. 3, pi. 216, f. 7-8. 



Eburna (Zemira) australis Adams, "Gen. Recent Moll.," 1858, vol. i, 

 p. 132- 



