552 MB. E. A. SMITH OK MARINE SHELLS 



61. LiTTORINA MELANACME, Sp. nOV. PI. XXX. fig. 21. 



Testa ovata, ventricosa, ad apicem acuta et nigrescens, albida vel cseruleo- 

 albida lineis tenuibus fuscis radiantibus nuraerosis irregulariter picta ; 

 anfractus 6 convex!, striis spiralibus paucis sculpt! ; anfr. iilt!mus !nfra 

 suturam et prsecipue versus labrumaHquanto depressus, ad peripheriam 

 iDconsp!cue obtuse angulatus, str!!s transvers!s c!rciter 20 (pauc!s ad 

 bas!m quam cfEterse majoribus) ornatua ; apertura subsem!c!rculans, 

 !ntus saturate fusca, fasc!a lutea basal! ornata ; labrum margine luteo 

 fusco lineato ; columella obliqua, fere rectibnearis, leviter excavata, 

 fusca. Long. 9^ mill., diam. 5. 

 Hub. San Christoval, Solomon Islands. 



This species is allied to L. JVovcB-Zealandice of Eeeve, and differs 

 only in the following particulars: it is smaller, not quite so 

 globose iu form, of a bluish- wliite tinge, and with a dark apex ; 

 the longitudinal lines are cut across by the spiral striae, and thus 

 have a dotted ajipearance. In L. JVovce-Zealandits the apes is pale, 

 the ground-colour is opaque wliite, and the reddish lineations are 

 vei'y faint, and the spiral strisB are rather finer than in the present 

 species. The aperture of the latter is much darker in colour, the 

 edge of the outer lip is pale and dotted with short brown lines, 

 and the columella is brown and not so broadly excavated as that 

 of Eeeve's shell. 



62. RiSELLEA TANTILLA, Gould. — Trocbus tantillus, Gould, Proe. 

 Boston Sot: Nat. Hist, 1849, vol. ii!. p. 118; Otia Conchol. p. 69. 



Hab. Bonham Island, Marshall group (Brazier); Sandwich Islands 

 (Gould). 



This species appears to vary very much in height. It was ori- 

 ginally described as possessing a depressed spire ; but usually it 

 is shortly conical. The angulation of the whorls is very faint in 

 some examples and situated about the middle of the whorls. The 

 shells from the Marshall Islands are small, with the spire much 

 elevated, the radiating flexuous brown lines being wanting, and 

 the base is furnished with five instead of two spiral lirations 

 as described by Grould. The interior of the aperture is not pearly 

 as in the Trochidee ; and yet the operculum truly appertains to that 

 family, being concentric and raultispiral ; and although therefore 

 differing from that of Bisella, the shell itself appears to suggest 

 the propriety of its being located with that genus rather than 

 with the Trochidse. 



63. Planaxis virgatus, Smiili, Annals Sf Mag. Nat. Hist. 1872, 

 vol. !x. p. 44. 



Hab. San Christoval, Solomon Islands (Brazier). 



