1866.] MR. H. ADAMS ON SHELLS FROM CENTRAL AFRICA. 3/5 



Helicina diversicolor, mihi. M.C. 



H. testa globoso-turbinata, obsolete subcarinata, solida, superne 

 subconica, inferne depresso-convexiuscula, basi albida, gradatim 

 anfractu penultimo violaceo tincta, postquam violacea, denique 

 rubida, apice albido, sub lente transverse plicato-rugosa, an- 

 fractu ultimo pluribus lineis spiralibus obsoletis ; spira obtusa; 

 anfractibus quinque, planato-convexiusculis ; apertura obliqua, 

 lunata ; peristomate incrassato, modice refiexo, albo, ad colu- 

 mellam angulo prominente. 

 Diam. maj. 0-23, min. 0*20, alt. 0'20 unc. 



Hab. Pine Mountain, Ipswich, Queensland {Masters') ; Pine 

 Mountain, Lismore, Upper Richmond River (on leaves and trunks 

 of trees) (Macgillivray). 



A somewhat variable shell in colour : it frequently has a dead and 

 chalky instead of a porcellanous appearance ; and the red and violet 

 of the spire are sometimes greenish, or bluish, or wanting altogether. 

 The throat is occasionally reddish or yellowish instead of white. 

 Queensland specimens are not in general so brightly coloured as 

 Richmond River ones. 



Pupina pineticola, mihi. M.C. 



P. testa ovata, nitidissima, polita, solidiuscula, hyalina ; spira 

 obtusa ; anfractibus quinque, ultimo maximo, plusculum quam 

 dimidium testa cequante, proximo latitudine cequali, cceteris 

 celeriter decrescentibus ; apertura modice obliqua, fere orbicu- 

 lari ; peristomate albo, crasso reflexoque, canalibus duobus 

 interrupto, canali superiore externoque angusto, intus plica con- 

 cava prominente alba formato, canali altero ad medium oris 

 externe aperto et columellam separante ; operculo corneo, pauci- 

 spirali. 



Long. 20, diam. 0'12, apert. 0-09 unc. 



Hab. Pine Mountain, Lismore, Upper Richmond River (on the 

 ground, burrowing in dry weather) (Macgillivray). 



6. List of the Shells collected by Samuel White Baker, Esq., 

 during his recent Explorations in Central Africa. By 

 Henry Adams, F.L.S. 



1. LlMICOLARIA TENEBRICA, Reeve. 



2. Planorbis, sp. ? 



This species was also brought by Capt. Speke from the Victoria 

 N'yanza and White Nile, but I have not been able to ascertain 

 whether it has been described. 



3. VlVIPARA XJNICOLOR, Oliv. 



